Merge branch 'ds-v0.9.2-rocm' into 'main'

Ds v0.9.2 rocm

See merge request dcutoolkit/deeplearing/deepspeed!2

deepspeed/autotuning/utils.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 import re
 import collections.abc
@@ -176,6 +179,7 @@ def fetch_hostfile(hostfile_path):
 
 
 def validate_ds_config(config: dict):
+
     def is_False(config: dict, key):
         if config is None:
             return False
@@ -189,9 +193,7 @@ def validate_ds_config(config: dict):
     if stage == 1:
         return True
     elif stage == 2:
-        if is_False(config_zero,
-                    "cpu_offload") and is_False(config_zero,
-                                                "cpu_offload_params"):
+        if is_False(config_zero, "cpu_offload") and is_False(config_zero, "cpu_offload_params"):
             return False
     elif stage == 3:
         offload_devices = ["cpu", "nvme"]
@@ -289,14 +291,13 @@ def get_all_configs(tuning_space: dict, ignore_keys=None):
     Args:
         tuning_space (dict): the tuning space where tunable parameters are lists of values.
     """
+
     def gen_combinations(d: dict):
         keys, values = d.keys(), d.values()
         for v in values:
             if not isinstance(v, list):
                 v = [v]
-        values_choices = (gen_combinations(v) if isinstance(v,
-                                                            dict) else get_list(v)
-                          for v in values)
+        values_choices = (gen_combinations(v) if isinstance(v, dict) else get_list(v) for v in values)
         for comb in itertools.product(*values_choices):
             yield dict(zip(keys, comb))
 

deepspeed/checkpoint/__init__.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 from .reshape_meg_2d import reshape_meg_2d_parallel
 
 from .deepspeed_checkpoint import DeepSpeedCheckpoint
 
-from .utils import (get_layer_ckpt_name_for_rank,
-                    get_model_ckpt_name_for_rank,
-                    get_zero_ckpt_name_for_rank)
+from .utils import (get_layer_ckpt_name_for_rank, get_model_ckpt_name_for_rank, get_zero_ckpt_name_for_rank)
 
 from .reshape_utils import (merge_state)
 

deepspeed/checkpoint/constants.py

-'''Copyright The Microsoft DeepSpeed Team'''
-'''
-    Various symbolic constants used for model checkpointing
-'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+"""
+Various symbolic constants used for model checkpointing
+"""
 
 #########################################
 # Optimizer checkpoint keys
@@ -24,6 +27,8 @@ FP32_WEIGHT_KEY = "fp32"
 PARAM = 'param'
 PARAM_SHAPES = 'param_shapes'
 BUFFER_NAMES = 'buffer_names'
+FROZEN_PARAM_SHAPES = 'frozen_param_shapes'
+FROZEN_PARAM_FRAGMENTS = 'frozen_param_fragments'
 
 #########################################
 # Checkpoint naming constants

deepspeed/checkpoint/deepspeed_checkpoint.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 import os
 from typing import Dict
 import torch
 
 from .reshape_3d_utils import model_3d_desc
-from .reshape_utils import (basic_folder_validation,
-                            merge_state,
-                            partition_data,
-                            get_files,
-                            get_files_with_prefix)
+from .reshape_utils import (basic_folder_validation, merge_state, partition_data, get_files, get_files_with_prefix)
 
 from .constants import (MODEL_FILE_PREFIX, LAYER_FILE_PREFIX)
 
@@ -24,19 +23,15 @@ CHECKPOINT_INFO_KEY = 'checkpoint_info'
 ITERATION_KEY = 'iteration'
 
 SEQUENTIAL_LAYERS = [
-    'input_layernorm.weight',
-    'input_layernorm.bias',
-    'self_attention.dense.bias',
-    'post_attention_layernorm.weight',
-    'post_attention_layernorm.bias',
-    'mlp.dense_4h_to_h.bias',
-    'position_embeddings.weight'
+    'input_layernorm.weight', 'input_layernorm.bias', 'self_attention.dense.bias', 'post_attention_layernorm.weight',
+    'post_attention_layernorm.bias', 'mlp.dense_4h_to_h.bias', 'position_embeddings.weight'
 ]
 
 LAYER_CONCAT_DIM = {'self_attention.dense.weight': 1, 'mlp.dense_4h_to_h.weight': 1}
 
 
 class DeepSpeedCheckpoint(object):
+
     def __init__(self, dir, tp_degree=None, pp_degree=None, dp_degree=None):
         self.dir = dir
         self._validate_folder(dir)
@@ -50,33 +45,24 @@ class DeepSpeedCheckpoint(object):
         self.layer_keys = self._get_layer_keys()
         self.layer_count = len(self.layer_keys)
 
-        self.tp_degree = self.zero_checkpoint.get_src_tp_degree(
-        ) if tp_degree is None else tp_degree
-        self.pp_degree = self.zero_checkpoint.get_src_pp_degree(
-        ) if pp_degree is None else pp_degree
-        self.dp_degree = self.zero_checkpoint.get_src_dp_degree(
-        ) if dp_degree is None else dp_degree
+        self.tp_degree = self.zero_checkpoint.get_src_tp_degree() if tp_degree is None else tp_degree
+        self.pp_degree = self.zero_checkpoint.get_src_pp_degree() if pp_degree is None else pp_degree
+        self.dp_degree = self.zero_checkpoint.get_src_dp_degree() if dp_degree is None else dp_degree
 
-        self.original_world_size = self.zero_checkpoint.get_src_tp_degree(
-        ) * self.zero_checkpoint.get_src_pp_degree(
+        self.original_world_size = self.zero_checkpoint.get_src_tp_degree() * self.zero_checkpoint.get_src_pp_degree(
         ) * self.zero_checkpoint.get_src_dp_degree()
         self.world_size = self.tp_degree * self.pp_degree * self.dp_degree
 
         self.old_2d_map = meg_2d_parallel_map(self.zero_checkpoint.get_src_pp_degree(),
                                               self.zero_checkpoint.get_src_tp_degree())
         self.old_2d_map.simple_init()
-        self.new_2d_map = reshape_meg_2d_parallel(
-            old_pp_degree=self.zero_checkpoint.get_src_pp_degree(),
+        self.new_2d_map = reshape_meg_2d_parallel(old_pp_degree=self.zero_checkpoint.get_src_pp_degree(),
                                                   old_tp_degree=self.zero_checkpoint.get_src_tp_degree(),
                                                   new_pp_degree=self.pp_degree,
                                                   new_tp_degree=self.tp_degree)
 
-        if self.is_change_pp_degree() or self.is_change_tp_degree(
-        ) or self.is_change_dp_degree():
-            self.zero_checkpoint.reshape(
-                model_3d_desc(self.pp_degree,
-                              self.tp_degree,
-                              self.dp_degree))
+        if self.is_change_pp_degree() or self.is_change_tp_degree() or self.is_change_dp_degree():
+            self.zero_checkpoint.reshape(model_3d_desc(self.pp_degree, self.tp_degree, self.dp_degree))
 
         self.global_state = {}
 
@@ -84,8 +70,7 @@ class DeepSpeedCheckpoint(object):
         self.pp_to_transformer_map = self._build_pp_transformer_map()
         self.transformer_file_map = self._build_transformer_file_map()
         self.tp_to_embedding_map = self._build_tp_other_layer_map(EMBEDDING_LAYER_INDEX)
-        self.tp_to_final_norm_map = self._build_tp_other_layer_map(
-            FINAL_LAYER_NORM_INDEX)
+        self.tp_to_final_norm_map = self._build_tp_other_layer_map(FINAL_LAYER_NORM_INDEX)
         self._build_global_state()
 
     def is_change_tp_degree(self):
@@ -131,9 +116,7 @@ class DeepSpeedCheckpoint(object):
                                                        keys_to_ignore=[PARAM_SHAPES])
 
     def get_zero_files(self, pp_index, tp_index, dp_index) -> list:
-        return self.zero_checkpoint.get_files_for_rank(pp_index=pp_index,
-                                                       tp_index=tp_index,
-                                                       dp_index=dp_index)
+        return self.zero_checkpoint.get_files_for_rank(pp_index=pp_index, tp_index=tp_index, dp_index=dp_index)
 
     def get_embedding_layer_id(self):
         return self.layer_keys[EMBEDDING_LAYER_INDEX]
@@ -150,11 +133,7 @@ class DeepSpeedCheckpoint(object):
 
     def get_embedding_state(self, tp_index: int) -> Dict:
         assert tp_index in self.tp_to_embedding_map.keys()
-        sd_list = [
-            torch.load(fname,
-                       map_location=torch.device('cpu'))
-            for fname in self.tp_to_embedding_map[tp_index]
-        ]
+        sd_list = [torch.load(fname, map_location=torch.device('cpu')) for fname in self.tp_to_embedding_map[tp_index]]
         sd = self._merge_state_dicts(sd_list)
         return sd
 
@@ -179,10 +158,7 @@ class DeepSpeedCheckpoint(object):
         assert tp_index < self.tp_degree
         assert pp_index < self.pp_degree
         fname_list = self.get_2d_parallel_files(tp_index=tp_index, pp_index=pp_index)
-        sd_list = [
-            torch.load(fname,
-                       map_location=torch.device('cpu')) for fname in fname_list
-        ]
+        sd_list = [torch.load(fname, map_location=torch.device('cpu')) for fname in fname_list]
 
         merged_sd = None
         for sd in sd_list:
@@ -198,10 +174,7 @@ class DeepSpeedCheckpoint(object):
         assert pp_index < self.pp_degree
         t_list = []
         for fname_list in self.transformer_file_map[(tp_index, pp_index)]:
-            sd_list = [
-                torch.load(fname,
-                           map_location=torch.device('cpu')) for fname in fname_list
-            ]
+            sd_list = [torch.load(fname, map_location=torch.device('cpu')) for fname in fname_list]
             sd = self._merge_state_dicts(sd_list)
             t_list.append(sd)
         return t_list
@@ -212,8 +185,7 @@ class DeepSpeedCheckpoint(object):
 
     def get_final_norm_state(self, tp_index: int) -> Dict:
         assert tp_index in self.tp_to_final_norm_map.keys()
-        sd = torch.load(self.tp_to_final_norm_map[tp_index][0],
-                        map_location=torch.device('cpu'))
+        sd = torch.load(self.tp_to_final_norm_map[tp_index][0], map_location=torch.device('cpu'))
         return sd
 
     def get_final_norm_files(self, tp_index: int) -> list:
@@ -222,8 +194,7 @@ class DeepSpeedCheckpoint(object):
 
     def _build_tp_other_layer_map(self, layer_index: int):
         assert layer_index < len(self.layer_files)
-        layer_files = get_files_with_prefix(self.layer_files,
-                                            self.layer_keys[layer_index])
+        layer_files = get_files_with_prefix(self.layer_files, self.layer_keys[layer_index])
         layer_file_partitions = partition_data(layer_files, self.tp_degree)
         data_map = {i: flist for i, flist in enumerate(layer_file_partitions)}
         return data_map
@@ -238,11 +209,7 @@ class DeepSpeedCheckpoint(object):
         data_map = {}
         transformer_layers = self.layer_keys[1:-1]
         layers_per_pp = len(transformer_layers) // self.pp_degree
-        data_map = {
-            i: transformer_layers[i * layers_per_pp:(i + 1) * layers_per_pp]
-            for i in range(0,
-                           self.pp_degree)
-        }
+        data_map = {i: transformer_layers[i * layers_per_pp:(i + 1) * layers_per_pp] for i in range(0, self.pp_degree)}
         return data_map
 
     def _dump_mapping(self, data_map, map_tag=None):
@@ -308,10 +275,8 @@ class DeepSpeedCheckpoint(object):
 
         file_list = get_files(dir)
 
-        for file_prefix in [
-                MODEL_FILE_PREFIX,
-                LAYER_FILE_PREFIX,
-                f'{LAYER_FILE_PREFIX}01'
-        ]:
+        for file_prefix in [MODEL_FILE_PREFIX, LAYER_FILE_PREFIX, f'{LAYER_FILE_PREFIX}01']:
             ckpt_files = get_files_with_prefix(file_list, file_prefix)
-            assert len(ckpt_files) > 0, f'{dir} seems a bogus DeepSpeed checkpoint folder: Cannot find {file_prefix}* files in there.'
+            assert len(
+                ckpt_files
+            ) > 0, f'{dir} seems a bogus DeepSpeed checkpoint folder: Cannot find {file_prefix}* files in there.'

deepspeed/checkpoint/reshape_3d_utils.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
 
-from .reshape_utils import (get_files,
-                            get_files_with_prefix,
-                            partition_data,
-                            get_zero_files)
+# DeepSpeed Team
+
+from .reshape_utils import (get_files, get_files_with_prefix, partition_data, get_zero_files)
 
 from .constants import (MODEL_FILE_PREFIX, LAYER_FILE_PREFIX)
 
@@ -15,6 +15,7 @@ DP_DIM = 'DP'
 
 
 class model_3d_desc(object):
+
     def __init__(self, pp_degree=1, tp_degree=1, dp_degree=1):
         self.pp_degree = pp_degree
         self.tp_degree = tp_degree
@@ -33,8 +34,7 @@ class model_3d_desc(object):
                                            src_2d_size=self.pp_degree * self.tp_degree,
                                            dp_degree=self.dp_degree)
 
-        return unflatten_dp_dimension(meg_2d_map=flat_3d_map,
-                                      dp_degree=target_3d_desc.dp_degree)
+        return unflatten_dp_dimension(meg_2d_map=flat_3d_map, dp_degree=target_3d_desc.dp_degree)
 
     def get_desc(self):
         return f'{PP_DIM},{TP_DIM},{DP_DIM} = ({self.pp_degree}, {self.tp_degree}, {self.dp_degree})'
@@ -45,14 +45,11 @@ class model_3d_desc(object):
     def is_valid(self, pp_index, tp_index, dp_index):
         err_msg = []
         valid = True
-        for index, degree, dim_name in [
-            (pp_index, self.pp_degree, PP_DIM),
-            (tp_index, self.tp_degree, TP_DIM),
+        for index, degree, dim_name in [(pp_index, self.pp_degree, PP_DIM), (tp_index, self.tp_degree, TP_DIM),
                                         (dp_index, self.dp_degree, DP_DIM)]:
             if index >= degree:
                 valid = False
-                err_msg.append(
-                    f'{dim_name} indexing error: index {index} >= degree {degree}')
+                err_msg.append(f'{dim_name} indexing error: index {index} >= degree {degree}')
 
         return valid, err_msg
 
@@ -60,18 +57,15 @@ class model_3d_desc(object):
         err_msg = []
         if target_3d_desc.pp_degree > self.pp_degree:
             err_msg.append(
-                f'Expansion reshape not supported - {PP_DIM}: {self.pp_degree} ---> {target_3d_desc.pp_degree}'
-            )
+                f'Expansion reshape not supported - {PP_DIM}: {self.pp_degree} ---> {target_3d_desc.pp_degree}')
 
         if target_3d_desc.tp_degree > self.tp_degree:
             err_msg.append(
-                f'Expansion reshape not supported - {TP_DIM}: {self.tp_degree} ---> {target_3d_desc.tp_degree}'
-            )
+                f'Expansion reshape not supported - {TP_DIM}: {self.tp_degree} ---> {target_3d_desc.tp_degree}')
 
         if target_3d_desc.dp_degree > self.dp_degree:
             err_msg.append(
-                f'Expansion reshape not supported - {DP_DIM}: {self.dp_degree} ---> {target_3d_desc.dp_degree}'
-            )
+                f'Expansion reshape not supported - {DP_DIM}: {self.dp_degree} ---> {target_3d_desc.dp_degree}')
 
         return len(err_msg) == 0, err_msg
 
@@ -106,10 +100,7 @@ def flatten_dp_dimension(meg_2d_map, src_2d_size, dp_degree):
 def unflatten_dp_dimension(meg_2d_map, dp_degree):
     pp_degree = meg_2d_map.pp_degree
     tp_degree = meg_2d_map.tp_degree
-    meg_2d_map_list = [
-        meg_2d_parallel_map(pp_degree=pp_degree,
-                            tp_degree=tp_degree) for _ in range(dp_degree)
-    ]
+    meg_2d_map_list = [meg_2d_parallel_map(pp_degree=pp_degree, tp_degree=tp_degree) for _ in range(dp_degree)]
     for pp_index in range(pp_degree):
         for tp_index in range(tp_degree):
             flat_dp_indices = meg_2d_map.get_data(pp_index, tp_index)

deepspeed/checkpoint/reshape_meg_2d.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 from .reshape_utils import partition_data
 
 
 class meg_2d_parallel_map(object):
+
     def __init__(self, pp_degree, tp_degree):
         self.pp_degree = pp_degree
         self.tp_degree = tp_degree
@@ -11,8 +15,7 @@ class meg_2d_parallel_map(object):
 
     def simple_init(self):
         self.map = {
-            self._make_key(i // self.tp_degree,
-                           i % self.tp_degree): [i]
+            self._make_key(i // self.tp_degree, i % self.tp_degree): [i]
             for i in range(self.pp_degree * self.tp_degree)
         }
 
@@ -74,11 +77,7 @@ def _reshape_pp_dimension(old_2d_map, new_pp_degree):
     return new_2d_map
 
 
-def reshape_meg_2d_parallel(old_pp_degree,
-                            old_tp_degree,
-                            new_pp_degree,
-                            new_tp_degree,
-                            verbose=False):
+def reshape_meg_2d_parallel(old_pp_degree, old_tp_degree, new_pp_degree, new_tp_degree, verbose=False):
     assert new_pp_degree <= old_pp_degree
     assert new_tp_degree <= old_tp_degree
 
@@ -137,8 +136,7 @@ def get_mpu_ranks(tp_size=1, pp_size=1, dp_size=1, virtual_pp_size=None):
 
     tensor_model_parallel_size = min(tp_size, world_size)
     pipeline_model_parallel_size = min(pp_size, world_size)
-    data_parallel_size = world_size // (tensor_model_parallel_size *
-                                        pipeline_model_parallel_size)
+    data_parallel_size = world_size // (tensor_model_parallel_size * pipeline_model_parallel_size)
 
     num_tensor_model_parallel_groups = world_size // tensor_model_parallel_size
     num_pipeline_model_parallel_groups = world_size // pipeline_model_parallel_size
@@ -158,10 +156,7 @@ def get_mpu_ranks(tp_size=1, pp_size=1, dp_size=1, virtual_pp_size=None):
     # Build the model-parallel groups.
     all_pp_group_ranks = []
     for i in range(data_parallel_size):
-        ranks = [
-            data_parallel_group_ranks[i]
-            for data_parallel_group_ranks in all_dp_group_ranks
-        ]
+        ranks = [data_parallel_group_ranks[i] for data_parallel_group_ranks in all_dp_group_ranks]
         all_pp_group_ranks.append(list(ranks))
 
     print(f"PP", all_pp_group_ranks)
@@ -169,8 +164,7 @@ def get_mpu_ranks(tp_size=1, pp_size=1, dp_size=1, virtual_pp_size=None):
     # Build the tensor model-parallel groups.
     all_tp_group_ranks = []
     for i in range(num_tensor_model_parallel_groups):
-        ranks = range(i * tensor_model_parallel_size,
-                      (i + 1) * tensor_model_parallel_size)
+        ranks = range(i * tensor_model_parallel_size, (i + 1) * tensor_model_parallel_size)
         all_tp_group_ranks.append(list(ranks))
 
     print(f"TP", all_tp_group_ranks)

deepspeed/checkpoint/reshape_utils.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 import os
 import torch
@@ -49,11 +52,7 @@ def partition_data(data_list, num_partitions):
     num_elems = len(data_list)
     assert num_elems % num_partitions == 0
     partition_size = num_elems // num_partitions
-    partitions_list = [
-        data_list[i:i + partition_size] for i in range(0,
-                                                       num_elems,
-                                                       partition_size)
-    ]
+    partitions_list = [data_list[i:i + partition_size] for i in range(0, num_elems, partition_size)]
     return partitions_list
 
 
@@ -76,9 +75,7 @@ def merge_state_dict(dict_a, dict_b, key_list):
 def merge_state_list(list_a, list_b, key_list):
     if len(list_a) != len(list_b):
         print(f'{_key_list_to_string(key_list)}')
-        raise ValueError(
-            f'Cannot merge lists of different lengths, a = {len(list_a)} b = {len(list_b)}'
-        )
+        raise ValueError(f'Cannot merge lists of different lengths, a = {len(list_a)} b = {len(list_b)}')
 
     return [merge_state(a, b, key_list) for a, b in zip(list_a, list_b)]
 
@@ -87,8 +84,7 @@ def merge_state(state_a, state_b, key_list=[]):
     if type(state_a) != type(state_b):
         key_list_string = _key_list_to_string(key_list)
         print(f'key_list = {key_list_string}')
-        raise ValueError(
-            f'Cannot merge two states of types {type(state_a)} and type {type(state_b)}')
+        raise ValueError(f'Cannot merge two states of types {type(state_a)} and type {type(state_b)}')
 
     if type(state_a) in (dict, OrderedDict):
         return merge_state_dict(state_a, state_b, key_list)

deepspeed/checkpoint/universal_checkpoint.py

-"""
-Copyright 2022 The Microsoft DeepSpeed Team
-"""
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+
 import os
 import torch
 import types
-from .constants import (FP32_WEIGHT_KEY,
-                        PARAM,
-                        VOCAB_DIVISIBILITY_PADDING_TENSOR,
-                        CAT_DIM)
+from .constants import (FP32_WEIGHT_KEY, PARAM, VOCAB_DIVISIBILITY_PADDING_TENSOR, CAT_DIM)
 
 
 def load_hp_checkpoint_state(self, folder, tp_rank, tp_world_size):
@@ -44,9 +43,7 @@ def load_hp_checkpoint_state(self, folder, tp_rank, tp_world_size):
         # the converter to universal currently strips the original padding completely so the saved
         # weight is padding-free and we just need to add new padding depending on the target TP
         # degree
-        vocab_divisibility_padding_tensor = ckpt_dict.get(
-            VOCAB_DIVISIBILITY_PADDING_TENSOR,
-            None)
+        vocab_divisibility_padding_tensor = ckpt_dict.get(VOCAB_DIVISIBILITY_PADDING_TENSOR, None)
         if vocab_divisibility_padding_tensor is not None:
             # In the absence of data passed from the user wrt new padded vocab specific to tp degree
             # we can again derive that data by reverse engineering the target shapes like so:
@@ -56,13 +53,7 @@ def load_hp_checkpoint_state(self, folder, tp_rank, tp_world_size):
                 padding_size = padded_target_vocab_size - full_hp_param.shape[0]
                 # Implement the following concat in efficient way using pad
                 #full_hp_param = torch.cat((full_hp_param, padding_tensor), 0)
-                full_hp_param = torch.nn.functional.pad(full_hp_param,
-                                                        (0,
-                                                         0,
-                                                         0,
-                                                         padding_size),
-                                                        "constant",
-                                                        0)
+                full_hp_param = torch.nn.functional.pad(full_hp_param, (0, 0, 0, padding_size), "constant", 0)
                 full_hp_param[:-padding_size, :] = vocab_divisibility_padding_tensor
             else:
                 # Need to shrink or keep the same
@@ -76,8 +67,7 @@ def load_hp_checkpoint_state(self, folder, tp_rank, tp_world_size):
 
         assert full_param_numel == tp_world_size * tp_slice_numel, \
             f'Loading {ckpt_file} full param numel {full_param_numel} != tensor slice numel {tp_slice_numel} * tp_world_size {tp_world_size}'
-        dst_tensor = hp_mapping.hp_fragment if key == FP32_WEIGHT_KEY else hp_mapping.get_optim_state_fragment(
-            key)
+        dst_tensor = hp_mapping.hp_fragment if key == FP32_WEIGHT_KEY else hp_mapping.get_optim_state_fragment(key)
 
         #        print(f"{full_hp_param.shape=} {full_param_numel=} {folder=}")
         #        print(f"{dst_tensor.shape=} {dst_tensor.numel()=}{folder=}")
@@ -90,9 +80,7 @@ def load_hp_checkpoint_state(self, folder, tp_rank, tp_world_size):
         tp_hp_slice = tp_hp_slice.flatten()
 
         lp_frag_address = hp_mapping.lp_fragment_address
-        tp_hp_fragment = tp_hp_slice.narrow(0,
-                                            lp_frag_address.start,
-                                            lp_frag_address.numel)
+        tp_hp_fragment = tp_hp_slice.narrow(0, lp_frag_address.start, lp_frag_address.numel)
         assert dst_tensor.numel() == lp_frag_address.numel, \
             f'Load checkpoint {key} dst_tensor numel {dst_tensor.numel()} != src numel {lp_frag_address.numel}'
 
@@ -104,5 +92,4 @@ def load_hp_checkpoint_state(self, folder, tp_rank, tp_world_size):
 
 def enable_universal_checkpoint(param_list):
     for param in param_list:
-        param.load_hp_checkpoint_state = types.MethodType(load_hp_checkpoint_state,
-                                                          param)
+        param.load_hp_checkpoint_state = types.MethodType(load_hp_checkpoint_state, param)

deepspeed/checkpoint/utils.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 import os
-from .constants import (MODEL_FILE_PREFIX,
-                        MODEL_FILE_SUFFIX,
-                        OPTIM_FILE_SUFFIX,
-                        ZERO_FILE_PREFIX)
+from .constants import (MODEL_FILE_PREFIX, MODEL_FILE_SUFFIX, OPTIM_FILE_SUFFIX, ZERO_FILE_PREFIX)
 
 
 def get_model_ckpt_name_for_rank(base_folder, mp_rank_str):

deepspeed/checkpoint/zero_checkpoint.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 import torch
 
-from .constants import (BASE_OPTIMIZER_STATE,
-                        GROUP_PADDINGS,
-                        OPTIMIZER_STATE_DICT,
-                        PARTITION_COUNT)
+from .constants import (BASE_OPTIMIZER_STATE, GROUP_PADDINGS, OPTIMIZER_STATE_DICT, PARTITION_COUNT)
 
 from .reshape_utils import (basic_folder_validation, get_zero_files, merge_state)
 
@@ -15,6 +15,7 @@ GROUP_STATE_KEY = 'state'
 
 
 class ZeROCheckpoint(object):
+
     def __init__(self, dir):
         basic_folder_validation(dir)
         self.dir = dir
@@ -49,12 +50,7 @@ class ZeROCheckpoint(object):
         file_idx_list = self.get_file_indices_for_rank(pp_index, tp_index, dp_index)
         return [self.file_list[idx] for idx in file_idx_list]
 
-    def get_state_for_rank(self,
-                           pp_index,
-                           tp_index,
-                           dp_index,
-                           keys_to_ignore=[],
-                           strip_tensor_paddings=True):
+    def get_state_for_rank(self, pp_index, tp_index, dp_index, keys_to_ignore=[], strip_tensor_paddings=True):
         state_file_list = self.get_files_for_rank(pp_index, tp_index, dp_index)
         merged_sd = None
         for state_file in state_file_list:
@@ -111,10 +107,7 @@ class ZeROCheckpoint(object):
             for state_name, state_value in group_state.items():
                 if torch.is_tensor(state_value):
                     raw_length = state_value.numel() - group_paddings[key]
-                    group_state[state_name] = torch.narrow(state_value,
-                                                           0,
-                                                           0,
-                                                           raw_length).clone()
+                    group_state[state_name] = torch.narrow(state_value, 0, 0, raw_length).clone()
 
     def _clear_group_paddings(self, sd):
         group_paddings = self._get_optimizer_state(sd, GROUP_PADDINGS)
@@ -144,5 +137,4 @@ class ZeROCheckpoint(object):
         partition_counts = self._get_optimizer_state(sd, PARTITION_COUNT)
         if partition_counts:
             num_groups = len(partition_counts)
-            sd[OPTIMIZER_STATE_DICT][PARTITION_COUNT] = [self.target_3d.dp_degree
-                                                         ] * num_groups
+            sd[OPTIMIZER_STATE_DICT][PARTITION_COUNT] = [self.target_3d.dp_degree] * num_groups

deepspeed/comm/__init__.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
 
-import torch
-from .utils import *
-from deepspeed import utils
-
-supported_torch_version = False
-
-# See more details at: https://github.com/pytorch/pytorch/pull/48767
-# The PG API in torch versions lesser than 1.8 are different so it is
-# non-trivial to support both in the same API. We will just use the
-# DS comm. backend in deepspeed/comm/comm.py if torch version if 1.8+.
-
-if older_torch():
-    # Add custom deepspeed torch comm functions here since we can't import deepspeed.comm
-    # NOTE: We can't call torch.distributed directly here. Current hack is to import functions before calling them.
-    supported_torch_version = False
-    from torch.distributed import *
-
-    def get_world_group():
-        return group.WORLD
+# DeepSpeed Team
 
-    def get_global_rank(group, group_rank):
-        if hasattr(torch.distributed.distributed_c10d, "get_global_rank"):
-            from torch.distributed.distributed_c10d import get_global_rank as _get_global_rank
-        else:
-            from torch.distributed.distributed_c10d import _get_global_rank
-        return _get_global_rank(group, group_rank)
-
-    def allgather_fn(output_tensor, input_tensor, group=None, async_op=False):
-        from torch.distributed import all_gather, get_world_size
-        from torch import chunk
-        output_tensors = list(chunk(output_tensor, get_world_size(group)))
-        return all_gather(output_tensors, input_tensor, group=group, async_op=async_op)
-
-    def reduce_scatter_fn(output_tensor, input_tensor, group=None, async_op=False):
-        from torch.distributed import reduce_scatter, get_world_size
-        from torch import chunk
-        input_tensor_lst = list(chunk(input_tensor, get_world_size(group)))
-        return reduce_scatter(output_tensor, input_tensor_lst, group=group)
-
-    def configure(deepspeed_config=None,
-                  enabled=None,
-                  prof_all=None,
-                  prof_ops=None,
-                  verbose=None):
-        utils.logger.warn(
-            "Communication logging is not supported in torch versions older than 1.8")
-
-else:
-    supported_torch_version = True
-    from .comm import *
+from .utils import *
+from .comm import *

deepspeed/comm/backend.py

-'''Copyright The Microsoft DeepSpeed Team'''
-''' DeepSpeed Communication Backend.
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+"""
+DeepSpeed Communication Backend.
 
 In the future, directly use NCCL/MPI/Gloo/etc without requiring torch.distributed. Simply wrap torch.distributed for now.
 
@@ -8,18 +12,18 @@ In the future, directly use NCCL/MPI/Gloo/etc without requiring torch.distribute
  - MPI -- [EXPERIMENTAL]
  - RCCL -- [EXPERIMENTAL]
  - GLOO -- [EXPERIMENTAL]
-
 # DS backend wrapper for torch.distributed [DEFAULT]
  - T-NCCL -- [DEFAULT]
  - T-GLOO
  - T-MPI
-'''
-''' Backend is the base class
+
+# Backend is the base class
      -- NcclBackend, MpiBackend, and TorchBackend are the main subclasses. TorchBackend is the only officially supported backend for now.
-'''
+"""
 
 
 class Backend(object):
+
     def __init__(self, name='backend', rank=0, size=1):
         self.name = name
         # The world size and rank of the world process group

deepspeed/comm/comm.py

-"""
-    Copyright 2021 The Microsoft DeepSpeed Team
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
 
+# DeepSpeed Team
+"""
     DeepSpeed Communication Package: deepspeed.comm
-
     deepspeed.comm
         -- import and use deepspeeed.ops.comm
         -- use torch.distributed directly if both this package and torch.distributed use the same NCCL version
         -- use custom collectives
             -- can either use torch.dist or ds.ops.comm?
-
         Note: the old 1-bit compressed allreduce variants that resided in deepspeed.runtime.comm will be moved here as well.
-
     deepspeed.comm API
         -- must be kept fully compatible (same signatures) as torch.dist API to ensure backward/cross-framework compatibility.
         -- e.g. if a client code used
             from deepspeed import comm as dist
-
             instead of
             import torch.distributed as dist
-
             The code should work without breaking any of the public torch.distributed functionality
-
     Future:
         -- deepspeed groups API should be brought into ds.comm
 """
@@ -63,10 +59,6 @@ timer_summary = {}
 
 comms_logger = CommsLogger()
 
-# Ensure we don't warn about base collectives more than once
-has_warned_all_gather = False
-has_warned_reduce_scatter = False
-
 # Maintain objects of all initialized ds backends and assign them using the API functions in this file
 nccl_backend = None
 mpi_backend = None
@@ -110,11 +102,12 @@ def configure(
 
 # Logging wrapper for timing ops
 def timed_op(func):
+
     def log_wrapper(*args, **kwargs):
         # Add enabled flag so that overhead to each comm op is two if conditions at most
         if comms_logger.enabled:
-            if ('prof' in kwargs and kwargs['prof']) or comms_logger.prof_all or (
-                    'log_name' in kwargs
+            if ('prof' in kwargs
+                    and kwargs['prof']) or comms_logger.prof_all or ('log_name' in kwargs
                                                                      and kwargs['log_name'] in comms_logger.prof_ops):
                 # Need func args for their defaults
                 func_args = get_default_args(func)
@@ -133,8 +126,7 @@ def timed_op(func):
                 if cdb.using_mpi:
                     cdb.barrier()
                 if ('prof' in kwargs and kwargs['prof']) or comms_logger.prof_all or (
-                        'log_name' in kwargs
-                        and kwargs['log_name'] in comms_logger.prof_ops):
+                        'log_name' in kwargs and kwargs['log_name'] in comms_logger.prof_ops):
                     log_name = get_debug_log_name(func_args, comms_logger.debug)
                     raw_name = func.__name__
                     timers(log_name).stop()
@@ -182,7 +174,8 @@ def destroy_process_group(group=None):
 
 def new_group(ranks):
     global cdb
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
     return cdb.new_group(ranks)
 
 
@@ -196,14 +189,12 @@ def is_available() -> bool:
     return True
 
 
-def set_backend(backend):
+def set_backend(backend_name):
     if not use_ds_backend:
         utils.logger.error(
             "DeepSpeed communication backend is required. Please use deepspeed.comm.init_distributed(backend, use_deepspeed=True) to use this functionality"
         )
-        raise RuntimeError(
-            'Error: Custom DeepSpeed backend called without initializing DeepSpeed distributed.'
-        )
+        raise RuntimeError('Error: Custom DeepSpeed backend called without initializing DeepSpeed distributed.')
 
     global cdb
     global nccl_backend
@@ -221,13 +212,7 @@ def set_backend(backend):
 
 
 @timed_op
-def broadcast(tensor,
-              src,
-              group=None,
-              async_op=False,
-              prof=False,
-              log_name='broadcast',
-              debug=get_caller_func()):
+def broadcast(tensor, src, group=None, async_op=False, prof=False, log_name='broadcast', debug=get_caller_func()):
     global cdb
     return cdb.broadcast(tensor=tensor, src=src, group=group, async_op=async_op)
 
@@ -241,17 +226,14 @@ def all_gather(tensor_list,
                log_name='all_gather',
                debug=get_caller_func()):
     global cdb
-    return cdb.all_gather(tensor_list=tensor_list,
-                          tensor=tensor,
-                          group=group,
-                          async_op=async_op)
+    return cdb.all_gather(tensor_list=tensor_list, tensor=tensor, group=group, async_op=async_op)
 
 
-def has_reduce_scatter_base():
+def has_reduce_scatter_tensor():
     global cdb
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
-    assert cdb.has_reduce_scatter_base is not None, 'has_reduce_scatter_base is not yet defined'
-    return cdb.has_reduce_scatter_base
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    return cdb.has_reduce_scatter_tensor()
 
 
 def reduce_scatter_fn(output_tensor,
@@ -262,10 +244,10 @@ def reduce_scatter_fn(output_tensor,
                       prof=False,
                       debug=get_caller_func()):
     global cdb
-    global has_warned_reduce_scatter
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
-    if cdb.has_reduce_scatter_base:
-        return reduce_scatter_base(output_tensor,
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    if cdb.has_reduce_scatter_tensor():
+        return reduce_scatter_tensor(output_tensor,
                                      tensor,
                                      op=op,
                                      group=group,
@@ -273,12 +255,10 @@ def reduce_scatter_fn(output_tensor,
                                      prof=prof,
                                      debug=debug)
     else:
-        if not has_warned_reduce_scatter:
-            utils.logger.warning(
-                "unable to find torch.distributed._reduce_scatter_base. will fall back to "
+        if get_rank() == 0:
+            utils.logger.warning_once("unable to find torch.distributed.reduce_scatter_tensor. will fall back to "
                                       "torch.distributed.all_gather which will result in suboptimal performance. "
                                       "please consider upgrading your pytorch installation.")
-            has_warned_reduce_scatter = True
         input_tensor_lst = list(torch.chunk(tensor, cdb.get_world_size(group)))
         return reduce_scatter(output_tensor,
                               input_tensor_lst,
@@ -290,16 +270,16 @@ def reduce_scatter_fn(output_tensor,
 
 
 @timed_op
-def reduce_scatter_base(output_tensor,
+def reduce_scatter_tensor(output_tensor,
                           tensor,
                           op=ReduceOp.SUM,
                           group=None,
                           async_op=False,
                           prof=False,
-                        log_name='reduce_scatter_base',
+                          log_name='reduce_scatter_tensor',
                           debug=get_caller_func()):
     global cdb
-    return cdb.reduce_scatter_base(output_tensor=output_tensor,
+    return cdb.reduce_scatter_tensor(output_tensor=output_tensor,
                                      input_tensor=tensor,
                                      op=op,
                                      group=group,
@@ -307,54 +287,37 @@ def reduce_scatter_base(output_tensor,
 
 
 @timed_op
-def all_gather_base(output_tensor,
+def all_gather_into_tensor(output_tensor,
                            tensor,
                            group=None,
                            async_op=False,
                            prof=False,
-                    log_name='all_gather_base',
+                           log_name='all_gather_into_tensor',
                            debug=get_caller_func()):
     global cdb
-    return cdb.all_gather_base(output_tensor=output_tensor,
-                               input_tensor=tensor,
-                               group=group,
-                               async_op=async_op)
+    return cdb.all_gather_into_tensor(output_tensor=output_tensor, input_tensor=tensor, group=group, async_op=async_op)
 
 
-def has_allgather_base():
+def has_all_gather_into_tensor():
     global cdb
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
-    assert cdb.has_allgather_base is not None, 'has_allgather_base is not yet defined'
-    return cdb.has_allgather_base
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    return cdb.has_all_gather_into_tensor()
 
 
-def allgather_fn(output_tensor,
-                 input_tensor,
-                 group=None,
-                 async_op=False,
-                 debug=get_caller_func()):
+def allgather_fn(output_tensor, input_tensor, group=None, async_op=False, debug=get_caller_func()):
     global cdb
-    global has_warned_all_gather
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
-    if cdb.has_allgather_base:
-        return all_gather_base(output_tensor,
-                               input_tensor,
-                               group=group,
-                               async_op=async_op,
-                               debug=debug)
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    if cdb.has_all_gather_into_tensor():
+        return all_gather_into_tensor(output_tensor, input_tensor, group=group, async_op=async_op, debug=debug)
     else:
-        if not has_warned_all_gather and get_rank() == 0:
-            utils.logger.warning(
-                "unable to find torch.distributed._all_gather_base. will fall back to "
+        if get_rank() == 0:
+            utils.logger.warning_once("unable to find torch.distributed.all_gather_into_tensor. will fall back to "
                                       "torch.distributed.all_gather which will result in suboptimal performance. "
                                       "please consider upgrading your pytorch installation.")
-            has_warned_all_gather = True
         output_tensors = list(torch.chunk(output_tensor, cdb.get_world_size(group)))
-        return all_gather(output_tensors,
-                          input_tensor,
-                          group=group,
-                          async_op=async_op,
-                          debug=debug)
+        return all_gather(output_tensors, input_tensor, group=group, async_op=async_op, debug=debug)
 
 
 @timed_op
@@ -377,49 +340,25 @@ def all_to_all_single(output,
 
 
 @timed_op
-def send(tensor,
-         dst,
-         group=None,
-         tag=0,
-         prof=False,
-         log_name='send',
-         debug=get_caller_func()):
+def send(tensor, dst, group=None, tag=0, prof=False, log_name='send', debug=get_caller_func()):
     global cdb
     return cdb.send(tensor=tensor, dst=dst, group=group, tag=tag)
 
 
 @timed_op
-def recv(tensor,
-         src=None,
-         group=None,
-         tag=0,
-         prof=False,
-         log_name='recv',
-         debug=get_caller_func()):
+def recv(tensor, src=None, group=None, tag=0, prof=False, log_name='recv', debug=get_caller_func()):
     global cdb
     return cdb.recv(tensor=tensor, src=src, group=group, tag=tag)
 
 
 @timed_op
-def isend(tensor,
-          dst,
-          group=None,
-          tag=0,
-          prof=False,
-          log_name='isend',
-          debug=get_caller_func()):
+def isend(tensor, dst, group=None, tag=0, prof=False, log_name='isend', debug=get_caller_func()):
     global cdb
     return cdb.send(tensor=tensor, dst=dst, group=group, tag=tag)
 
 
 @timed_op
-def irecv(tensor,
-          src=None,
-          group=None,
-          tag=0,
-          prof=False,
-          log_name='irecv',
-          debug=get_caller_func()):
+def irecv(tensor, src=None, group=None, tag=0, prof=False, log_name='irecv', debug=get_caller_func()):
     global cdb
     return cdb.recv(tensor=tensor, src=src, group=group, tag=tag)
 
@@ -434,11 +373,7 @@ def gather(tensor,
            log_name='gather',
            debug=get_caller_func()):
     global cdb
-    return cdb.gather(tensor=tensor,
-                      gather_list=gather_list,
-                      dst=dst,
-                      group=group,
-                      async_op=async_op)
+    return cdb.gather(tensor=tensor, gather_list=gather_list, dst=dst, group=group, async_op=async_op)
 
 
 @timed_op
@@ -451,20 +386,11 @@ def scatter(tensor,
             log_name='scatter',
             debug=get_caller_func()):
     global cdb
-    return cdb.scatter(tensor=tensor,
-                       scatter_list=scatter_list,
-                       src=src,
-                       group=group,
-                       async_op=async_op)
+    return cdb.scatter(tensor=tensor, scatter_list=scatter_list, src=src, group=group, async_op=async_op)
 
 
 @timed_op
-def barrier(group=None,
-            async_op=False,
-            device_ids=None,
-            prof=False,
-            log_name='barrier',
-            debug=get_caller_func()):
+def barrier(group=None, async_op=False, device_ids=None, prof=False, log_name='barrier', debug=get_caller_func()):
     global cdb
     return cdb.barrier(group=group, async_op=async_op, device_ids=device_ids)
 
@@ -511,11 +437,31 @@ def reduce_scatter(output,
                    log_name='reduce_scatter',
                    debug=get_caller_func()):
     global cdb
-    return cdb.reduce_scatter(output=output,
-                              input_list=input_list,
-                              op=op,
-                              group=group,
-                              async_op=async_op)
+    return cdb.reduce_scatter(output=output, input_list=input_list, op=op, group=group, async_op=async_op)
+
+
+def has_all_reduce_coalesced():
+    """"""
+    global cdb
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    assert cdb.has_all_reduce_coalesced is not None, 'has_all_reduce_coalesced is not yet defined'
+    return cdb.has_all_reduce_coalesced
+
+
+def has_coalescing_manager():
+    global cdb
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    assert cdb.has_coalescing_manager is not None, 'has_coalescing_manager is not yet defined'
+    return cdb.has_coalescing_manager
+
+
+def all_gather_coalesced(output_tensors, input_tensors, group=None, async_op=False):
+    global cdb
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    return cdb.all_gather_coalesced(output_tensors, input_tensors, group=group, async_op=async_op)
 
 
 @timed_op
@@ -535,9 +481,22 @@ def all_reduce(tensor,
     return cdb.all_reduce(tensor, op, group, async_op)
 
 
+@timed_op
+def all_reduce_coalesced(tensors,
+                         op=ReduceOp.SUM,
+                         group=None,
+                         async_op=False,
+                         prof=False,
+                         log_name='all_reduce',
+                         debug=get_caller_func()):
+    global cbd
+    return cdb.all_reduce_coalesced(tensors, op, group, async_op)
+
+
 def get_world_group():
     global cdb
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
     return cdb.get_world_group()
 
 
@@ -553,7 +512,8 @@ def get_world_size(group=None) -> int:
     """
     global cdb
 
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
     return cdb.get_world_size(group)
 
 
@@ -572,7 +532,8 @@ def get_rank(group=None):
         -1, if not part of the group
     """
     global cdb
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
     return cdb.get_rank(group)
 
 
@@ -585,13 +546,15 @@ def get_local_rank():
             local rank (= GPU device ID)
     """
     global cdb
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
     return get_local_rank_from_launcher()
 
 
 def get_global_rank(group=None, group_rank=0):
     global cdb
-    assert cdb is not None and cdb.is_initialized(), 'DeepSpeed backend not set, please initialize it using init_process_group()'
+    assert cdb is not None and cdb.is_initialized(
+    ), 'DeepSpeed backend not set, please initialize it using init_process_group()'
     return cdb.get_global_rank(group, group_rank)
 
 
@@ -640,9 +603,7 @@ def init_distributed(dist_backend=None,
         required_env = ["RANK", "WORLD_SIZE", "MASTER_ADDR", "MASTER_PORT", "LOCAL_RANK"]
         if auto_mpi_discovery and not all(map(lambda v: v in os.environ, required_env)):
             if verbose:
-                utils.logger.info(
-                    "Not using the DeepSpeed or dist launchers, attempting to detect MPI environment..."
-                )
+                utils.logger.info("Not using the DeepSpeed or dist launchers, attempting to detect MPI environment...")
             if in_aml() and not in_dlts():
                 patch_aml_env_for_torch_nccl_backend(verbose=verbose)
             elif in_aws_sm():
@@ -658,9 +619,7 @@ def init_distributed(dist_backend=None,
             if dist_backend == None:
                 dist_backend = get_accelerator().communication_backend_name()
             if int(os.getenv('RANK', '0')) == 0:
-                utils.logger.info(
-                    'Initializing TorchBackend in DeepSpeed with backend {}'.format(
-                        dist_backend))
+                utils.logger.info('Initializing TorchBackend in DeepSpeed with backend {}'.format(dist_backend))
             # Create a torch backend object, initialize torch distributed, and assign to cdb
             cdb = TorchBackend(dist_backend, timeout, init_method, rank, world_size)
 
@@ -695,16 +654,12 @@ def mpi_discovery(distributed_port=TORCH_DISTRIBUTED_DEFAULT_PORT, verbose=True)
 
     if verbose:
         utils.logger.info(
-            "Discovered MPI settings of world_rank={}, local_rank={}, world_size={}, master_addr={}, master_port={}"
-            .format(os.environ['RANK'],
-                    os.environ['LOCAL_RANK'],
-                    os.environ['WORLD_SIZE'],
-                    os.environ['MASTER_ADDR'],
+            "Discovered MPI settings of world_rank={}, local_rank={}, world_size={}, master_addr={}, master_port={}".
+            format(os.environ['RANK'], os.environ['LOCAL_RANK'], os.environ['WORLD_SIZE'], os.environ['MASTER_ADDR'],
                    os.environ['MASTER_PORT']))
 
     if cdb is not None and cdb.is_initialized():
-        assert cdb.get_rank() == rank, "MPI rank {} does not match torch rank {}".format(
-            rank, cdb.get_rank())
+        assert cdb.get_rank() == rank, "MPI rank {} does not match torch rank {}".format(rank, cdb.get_rank())
         assert cdb.get_world_size() == world_size, "MPI world size {} does not match torch world size {}".format(
             world_size, cdb.get_world_size())
 
@@ -731,8 +686,7 @@ def patch_aml_env_for_torch_nccl_backend(master_port=6105, verbose=True):
     """
     os.environ["RANK"] = os.environ["OMPI_COMM_WORLD_RANK"]
     os.environ["WORLD_SIZE"] = os.environ["OMPI_COMM_WORLD_SIZE"]
-    single_node = int(os.environ["OMPI_COMM_WORLD_LOCAL_SIZE"]) == int(
-        os.environ["WORLD_SIZE"])
+    single_node = int(os.environ["OMPI_COMM_WORLD_LOCAL_SIZE"]) == int(os.environ["WORLD_SIZE"])
 
     if not single_node:
         master_node_params = os.environ["AZ_BATCH_MASTER_NODE"].split(":")
@@ -745,8 +699,7 @@ def patch_aml_env_for_torch_nccl_backend(master_port=6105, verbose=True):
         os.environ["MASTER_PORT"] = DEFAULT_AML_MASTER_PORT
 
     if verbose:
-        utils.logger.info("NCCL_SOCKET_IFNAME original value = {}".format(
-            os.environ["NCCL_SOCKET_IFNAME"]))
+        utils.logger.info("NCCL_SOCKET_IFNAME original value = {}".format(os.environ["NCCL_SOCKET_IFNAME"]))
 
     os.environ["NCCL_SOCKET_IFNAME"] = DEFAULT_AML_NCCL_SOCKET_IFNAME
     os.environ['LOCAL_RANK'] = os.environ["OMPI_COMM_WORLD_LOCAL_RANK"]
@@ -754,10 +707,7 @@ def patch_aml_env_for_torch_nccl_backend(master_port=6105, verbose=True):
     if verbose:
         utils.logger.info(
             "Discovered AzureML settings of world_rank={}, local_rank={}, world_size={}, master_addr={}, master_port={}"
-            .format(os.environ['RANK'],
-                    os.environ['LOCAL_RANK'],
-                    os.environ['WORLD_SIZE'],
-                    os.environ['MASTER_ADDR'],
+            .format(os.environ['RANK'], os.environ['LOCAL_RANK'], os.environ['WORLD_SIZE'], os.environ['MASTER_ADDR'],
                     os.environ['MASTER_PORT']))
 
 
@@ -771,8 +721,5 @@ def patch_aws_sm_env_for_torch_nccl_backend(verbose=True):
     if verbose:
         utils.logger.info(
             "Discovered AWS SageMaker settings of world_rank={}, local_rank={}, world_size={}, master_addr={}, master_port={}"
-            .format(os.environ['RANK'],
-                    os.environ['LOCAL_RANK'],
-                    os.environ['WORLD_SIZE'],
-                    os.environ['MASTER_ADDR'],
+            .format(os.environ['RANK'], os.environ['LOCAL_RANK'], os.environ['WORLD_SIZE'], os.environ['MASTER_ADDR'],
                     os.environ['MASTER_PORT']))

deepspeed/comm/config.py

-'''Copyright The Microsoft DeepSpeed Team'''
-"""
-Copyright (c) Microsoft Corporation
-Licensed under the MIT license.
-"""
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 from pydantic import BaseModel
 from .constants import *
 
 
 class CommsConfig(BaseModel):
+
     class Config:
         validate_all = True
         validate_assignment = True
@@ -25,6 +25,7 @@ class CommsLoggerConfig(CommsConfig):
 
 
 class DeepSpeedCommsConfig:
+
     def __init__(self, ds_config):
         self.comms_logger_enabled = 'comms_logger' in ds_config
 

deepspeed/comm/constants.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 NCCL_BACKEND = 'nccl'
 MPI_BACKEND = 'mpi'

deepspeed/comm/torch.py

-'''
-Copyright 2021 The Microsoft DeepSpeed Team
-'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+
 from deepspeed import utils
 
 from .utils import *
 from .backend import *
 from .comm import *
 
+import torch
+
+
+def is_torch_two():
+    TORCH_MAJOR = int(torch.__version__.split('.')[0])
+    if TORCH_MAJOR >= 2:
+        return True
+    else:
+        return False
+
+
+def has_coalescing_manager():
+    has_c10d = hasattr(torch.distributed, 'distributed_c10d')
+    return has_c10d and hasattr(torch.distributed.distributed_c10d, '_coalescing_manager')
+
+
+def has_all_reduce_coalesced():
+    return hasattr(torch.distributed, "all_reduce_coalesced")
+
+
+def get_coalescing_manager(group, device, reqs):
+    if is_torch_two():
+        return torch.distributed.distributed_c10d._coalescing_manager(group, device=device, reqs=reqs)
+    else:
+        return torch.distributed.distributed_c10d._coalescing_manager(group, reqs)
+
 
 class TorchBackend(Backend):
     """
@@ -16,17 +44,13 @@ class TorchBackend(Backend):
         so no need to wrap all the functions. We can keep adding wrappers as
         needed.
     """
-    def __init__(self,
-                 backend,
-                 timeout,
-                 init_method,
-                 rank=-1,
-                 world_size=-1,
-                 name='torch'):
+
+    def __init__(self, backend, timeout, init_method, rank=-1, world_size=-1, name='torch'):
         super(TorchBackend, self).__init__()
-        self.torch_version_before_18 = older_torch()
-        self.has_allgather_base = has_allgather_base()
-        self.has_reduce_scatter_base = has_reduce_scatter_base()
+        self.has_all_reduce_coalesced = has_all_reduce_coalesced()
+        self.has_coalescing_manager = has_coalescing_manager()
+        self.all_gather_function = self.get_all_gather_function()
+        self.reduce_scatter_function = self.get_reduce_scatter_function()
         self.initialized = True
         self.name = name
         # Future functionality to support ds.initialize() on a single GPU
@@ -35,6 +59,28 @@ class TorchBackend(Backend):
         self.single_gpu_mode = True
         self.init_process_group(backend, timeout, init_method, rank, world_size)
 
+    @classmethod
+    def get_all_gather_function(self):
+        if hasattr(torch.distributed, "all_gather_into_tensor"):
+            return torch.distributed.all_gather_into_tensor
+        elif hasattr(torch.distributed, "_all_gather_base"):
+            return torch.distributed._all_gather_base
+        return None
+
+    @classmethod
+    def get_reduce_scatter_function(self):
+        if hasattr(torch.distributed, "reduce_scatter_tensor"):
+            return torch.distributed.reduce_scatter_tensor
+        elif hasattr(torch.distributed, "_reduce_scatter_base"):
+            return torch.distributed._reduce_scatter_base
+        return None
+
+    def has_all_gather_into_tensor(self):
+        return self.all_gather_function is not None
+
+    def has_reduce_scatter_tensor(self):
+        return self.reduce_scatter_function is not None
+
     def init_process_group(self, backend, timeout, init_method, rank, world_size):
         if not torch.distributed.is_initialized():
             torch.distributed.init_process_group(backend,
@@ -44,30 +90,24 @@ class TorchBackend(Backend):
                                                  world_size=world_size)
         self.using_mpi = torch.distributed.get_backend() == 'mpi'
 
-    def all_reduce(self,
-                   tensor,
-                   op=torch.distributed.ReduceOp.SUM,
-                   group=None,
-                   async_op=False):
+    def all_reduce(self, tensor, op=torch.distributed.ReduceOp.SUM, group=None, async_op=False):
         op = self._reduce_op(op)
-        return torch.distributed.all_reduce(tensor=tensor,
-                                            op=op,
-                                            group=group,
-                                            async_op=async_op)
+        return torch.distributed.all_reduce(tensor=tensor, op=op, group=group, async_op=async_op)
+
+    def all_reduce_coalesced(self, tensors, op=torch.distributed.ReduceOp.SUM, group=None, async_op=False):
+        """ proxy func to torch.distributed.all_reduce_coalesced,
+        which is included in PyTorch 1.13 and above
+        """
+        if not self.has_all_reduce_coalesced:
+            raise RuntimeError(f"Current torch version does not have all_reduce_coalesced "
+                               f"api (torch.__version__: {torch.__version__})")
+        op = self._reduce_op(op)
+        return torch.distributed.all_reduce_coalesced(tensors=tensors, op=op, group=group, async_op=async_op)
 
     def reduce(self, tensor, dst, op=ReduceOp.SUM, group=None, async_op=False):
-        return torch.distributed.reduce(tensor=tensor,
-                                        dst=dst,
-                                        op=self._reduce_op(op),
-                                        group=group,
-                                        async_op=async_op)
+        return torch.distributed.reduce(tensor=tensor, dst=dst, op=self._reduce_op(op), group=group, async_op=async_op)
 
-    def reduce_scatter(self,
-                       output,
-                       input_list,
-                       op=ReduceOp.SUM,
-                       group=None,
-                       async_op=False):
+    def reduce_scatter(self, output, input_list, op=ReduceOp.SUM, group=None, async_op=False):
         return torch.distributed.reduce_scatter(output=output,
                                                 input_list=input_list,
                                                 op=self._reduce_op(op),
@@ -75,46 +115,55 @@ class TorchBackend(Backend):
                                                 async_op=async_op)
 
     def broadcast(self, tensor, src, group=None, async_op=False):
-        return torch.distributed.broadcast(tensor=tensor,
-                                           src=src,
-                                           group=group,
-                                           async_op=async_op)
+        return torch.distributed.broadcast(tensor=tensor, src=src, group=group, async_op=async_op)
 
     def all_gather(self, tensor_list, tensor, group=None, async_op=False):
-        return torch.distributed.all_gather(tensor_list=tensor_list,
-                                            tensor=tensor,
-                                            group=group,
-                                            async_op=async_op)
+        return torch.distributed.all_gather(tensor_list=tensor_list, tensor=tensor, group=group, async_op=async_op)
 
-    def all_gather_base(self, output_tensor, input_tensor, group=None, async_op=False):
-        if self.has_allgather_base:
-            return torch.distributed.distributed_c10d._all_gather_base(
-                output_tensor=output_tensor,
+    def all_gather_into_tensor(self, output_tensor, input_tensor, group=None, async_op=False):
+        if self.has_all_gather_into_tensor():
+            return self.all_gather_function(output_tensor=output_tensor,
                                             input_tensor=input_tensor,
                                             group=group,
                                             async_op=async_op)
         else:
-            utils.logger.warning(
-                "unable to find torch.distributed._all_gather_base. will fall back to "
-                "torch.distributed.reduce_scatter which will result in suboptimal performance. "
+            utils.logger.warning("unable to find torch.distributed._all_gather_base. will fall back to "
+                                 "torch.distributed.all_gather which will result in suboptimal performance. "
                                  "please consider upgrading your pytorch installation.")
             pass
 
-    def reduce_scatter_base(self,
-                            output_tensor,
-                            input_tensor,
-                            op=ReduceOp.SUM,
-                            group=None,
-                            async_op=False):
-        if self.has_reduce_scatter_base:
-            return torch.distributed._reduce_scatter_base(output_tensor,
+    def all_gather_coalesced(self, output_tensors, input_tensors, group=None, async_op=False):
+        """"""
+        assert len(output_tensors) == len(input_tensors), ""
+        if hasattr(torch.distributed.distributed_c10d, '_all_gather_base_coalesced'):
+            # customized PyTorch
+            return torch.distributed.distributed_c10d._all_gather_base_coalesced(output_tensors,
+                                                                                 input_tensors,
+                                                                                 group=group,
+                                                                                 async_op=async_op)
+        elif has_coalescing_manager():
+            reqs = []
+            with get_coalescing_manager(group, input_tensors[0].device, reqs):
+                for output, input in zip(output_tensors, input_tensors):
+                    handle = torch.distributed.distributed_c10d.all_gather_into_tensor(output,
+                                                                                       input,
+                                                                                       group=group,
+                                                                                       async_op=True)
+                    reqs.append(handle)
+            if async_op:
+                return reqs[-1]
+            else:
+                reqs[-1].wait()
+
+    def reduce_scatter_tensor(self, output_tensor, input_tensor, op=ReduceOp.SUM, group=None, async_op=False):
+        if self.has_reduce_scatter_tensor():
+            return self.reduce_scatter_function(output_tensor,
                                                 input_tensor,
                                                 op=self._reduce_op(op),
                                                 group=group,
                                                 async_op=async_op)
         else:
-            utils.logger.warning(
-                "unable to find torch.distributed._reduce_scatter_base. will fall back to "
+            utils.logger.warning("unable to find torch.distributed.reduce_scatter_tensor. will fall back to "
                                  "torch.distributed.reduce_scatter which will result in suboptimal performance. "
                                  "please consider upgrading your pytorch installation.")
             pass
@@ -159,25 +208,15 @@ class TorchBackend(Backend):
                                          group=group,
                                          async_op=async_op)
 
-    def barrier(self,
-                group=torch.distributed.GroupMember.WORLD,
-                async_op=False,
-                device_ids=None):
+    def barrier(self, group=torch.distributed.GroupMember.WORLD, async_op=False, device_ids=None):
         if group is None:
             group = torch.distributed.GroupMember.WORLD
-        return torch.distributed.barrier(group=group,
-                                         async_op=async_op,
-                                         device_ids=device_ids)
-
-    def monitored_barrier(self,
-                          group=torch.distributed.GroupMember.WORLD,
-                          timeout=None,
-                          wait_all_ranks=False):
+        return torch.distributed.barrier(group=group, async_op=async_op, device_ids=device_ids)
+
+    def monitored_barrier(self, group=torch.distributed.GroupMember.WORLD, timeout=None, wait_all_ranks=False):
         if group is None:
             group = torch.distributed.GroupMember.WORLD
-        return torch.distributed.monitored_barrier(group=group,
-                                                   timeout=timeout,
-                                                   wait_all_ranks=wait_all_ranks)
+        return torch.distributed.monitored_barrier(group=group, timeout=timeout, wait_all_ranks=wait_all_ranks)
 
     def get_rank(self, group=None):
         return torch.distributed.get_rank(group=group)

deepspeed/comm/utils.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 import os
-import torch
 import inspect
 from deepspeed.utils import get_caller_func
 
 
-def older_torch():
-    '''
-        Helper to lookup torch version. For versions less than 1.8, torch.dist
-        used torch.distributed.group.WORLD as the default group argument instead of None.
-        See more details at: https://github.com/pytorch/pytorch/pull/48767
-    '''
-    TORCH_MAJOR = int(torch.__version__.split('.')[0])
-    TORCH_MINOR = int(torch.__version__.split('.')[1])
-    if TORCH_MAJOR == 1 and TORCH_MINOR < 8:
-        return True
-    else:
-        return False
-
-
-def has_allgather_base():
-    '''
-        Helper to check if torch.distributed has _all_gather_base
-    '''
-    return hasattr(torch.distributed, "_all_gather_base")
-
-
-def has_reduce_scatter_base():
-    '''
-        Helper to check if torch.distributed has _reduce_scatter_base
-    '''
-    return hasattr(torch.distributed, "_reduce_scatter_base")
-
-
 def get_local_rank_from_launcher():
 
     # DeepSpeed launcher will set it so get from there
@@ -84,11 +58,7 @@ def get_world_size_from_launcher():
 
 def get_default_args(func):
     signature = inspect.signature(func)
-    return {
-        k: v.default
-        for k,
-        v in signature.parameters.items() if v.default is not inspect.Parameter.empty
-    }
+    return {k: v.default for k, v in signature.parameters.items() if v.default is not inspect.Parameter.empty}
 
 
 # We need this hacky function since torch doesn't consistently name or place the input tensor args

deepspeed/compression/__init__.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 from .compress import init_compression, redundancy_clean
 from .scheduler import compression_scheduler

deepspeed/compression/basic_layer.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 import torch
 import math
@@ -21,6 +24,7 @@ class QuantAct(nn.Module):
         Momentum for updating the activation quantization range.
     quant_mode : str, default 'symmetric'
     """
+
     def __init__(self, act_range_momentum=0.95, quant_mode='symmetric'):
         super(QuantAct, self).__init__()
 
@@ -50,10 +54,8 @@ class QuantAct(nn.Module):
                 self.x_min_max[1] = x_max
 
             # if do not need momentum, please set self.act_range_momentum = 0
-            self.x_min_max[0] = self.x_min_max[0] * self.act_range_momentum + x_min * (
-                1 - self.act_range_momentum)
-            self.x_min_max[1] = self.x_min_max[1] * self.act_range_momentum + x_max * (
-                1 - self.act_range_momentum)
+            self.x_min_max[0] = self.x_min_max[0] * self.act_range_momentum + x_min * (1 - self.act_range_momentum)
+            self.x_min_max[1] = self.x_min_max[1] * self.act_range_momentum + x_max * (1 - self.act_range_momentum)
 
         x_q = self.act_function(x, num_bits, self.x_min_max[0], self.x_min_max[1])
 
@@ -61,6 +63,7 @@ class QuantAct(nn.Module):
 
 
 class Embedding_Compress(nn.Embedding):
+
     def __init__(self, *kargs):
         super(Embedding_Compress, self).__init__(*kargs)
         self.weight.start_bits = None
@@ -71,17 +74,10 @@ class Embedding_Compress(nn.Embedding):
 
     def extra_repr(self):
         return 'num_embeddings={}, embedding_dim={}, weight_quantization={}'.format(
-            self.num_embeddings,
-            self.embedding_dim,
-            self.weight.target_bits)
-
-    def enable_weight_quantization(self,
-                                   start_bits,
-                                   target_bits,
-                                   quantization_period,
-                                   weight_quantization_enabled_in_forward,
-                                   quantization_type,
-                                   num_groups):
+            self.num_embeddings, self.embedding_dim, self.weight.target_bits)
+
+    def enable_weight_quantization(self, start_bits, target_bits, quantization_period,
+                                   weight_quantization_enabled_in_forward, quantization_type, num_groups):
         self.weight.start_bits = start_bits
         self.weight.target_bits = target_bits
         self.weight.q_period = quantization_period
@@ -105,31 +101,20 @@ class Embedding_Compress(nn.Embedding):
             self.weight_quantize_num_groups = self.weight.size(0)
 
     def fix_weight_quantization(self):
-        self.weight.data = self.weight_quantizer(self.weight,
-                                                 self.weight.target_bits,
-                                                 None,
-                                                 None,
+        self.weight.data = self.weight_quantizer(self.weight, self.weight.target_bits, None, None,
                                                  self.weight_quantize_num_groups).data
         self.weight_quantization_enabled_in_forward = False
         return None
 
     def forward(self, input):
         if self.weight_quantization_enabled_in_forward and self.weight_quantization_enabled:
-            weight = self.weight_quantizer(self.weight,
-                                           self.weight.target_bits,
-                                           None,
-                                           None,
+            weight = self.weight_quantizer(self.weight, self.weight.target_bits, None, None,
                                            self.weight_quantize_num_groups)
         else:
             weight = self.weight
 
-        out = nn.functional.embedding(input,
-                                      weight,
-                                      self.padding_idx,
-                                      self.max_norm,
-                                      self.norm_type,
-                                      self.scale_grad_by_freq,
-                                      self.sparse)
+        out = nn.functional.embedding(input, weight, self.padding_idx, self.max_norm, self.norm_type,
+                                      self.scale_grad_by_freq, self.sparse)
         return out
 
 
@@ -137,6 +122,7 @@ class LinearLayer_Compress(nn.Linear):
     """
     Linear layer with compression.
     """
+
     def __init__(self, *kargs, bias=True):
         super(LinearLayer_Compress, self).__init__(*kargs, bias=bias)
         self.sparse_pruning_method = None
@@ -169,8 +155,7 @@ class LinearLayer_Compress(nn.Linear):
             mask = mask.to(self.weight.device)
         elif method == 'topk':
             self.sparse_mask_scores = nn.Parameter(torch.Tensor(self.weight.size()))
-            self.sparse_mask_scores.data = self.sparse_mask_scores.data.to(
-                self.weight.device)
+            self.sparse_mask_scores.data = self.sparse_mask_scores.data.to(self.weight.device)
             init.kaiming_uniform_(self.sparse_mask_scores, a=math.sqrt(5))
             mask = None
         else:
@@ -209,11 +194,9 @@ class LinearLayer_Compress(nn.Linear):
             raise NotImplementedError
         else:
             self.head_pruning_ratio = ratio
-            self.head_pruning_scores = nn.Parameter(torch.Tensor(
-                1,
+            self.head_pruning_scores = nn.Parameter(torch.Tensor(1,
                                                                  self.num_heads))  # we apply the pruning to O matrix
-            self.head_pruning_scores.data = self.head_pruning_scores.data.to(
-                self.weight.device)
+            self.head_pruning_scores.data = self.head_pruning_scores.data.to(self.weight.device)
             init.kaiming_uniform_(self.head_pruning_scores, a=math.sqrt(5))
 
     def fix_sparse_pruning_helper(self):
@@ -279,18 +262,17 @@ class LinearLayer_Compress(nn.Linear):
                     start_bits = self.weight.start_bits
                     target_bits = self.weight.target_bits
                     q_period = self.weight.q_period
-                    self.weight = nn.Parameter(self.weight.data.t().reshape(num_heads, -1)[mask.view(-1), :].reshape(-1, shape).t())
+                    self.weight = nn.Parameter(self.weight.data.t().reshape(num_heads,
+                                                                            -1)[mask.view(-1), :].reshape(-1,
+                                                                                                          shape).t())
                     self.weight.start_bits = start_bits
                     self.weight.target_bits = target_bits
                     self.weight.q_period = q_period
                 else:
 
                     shape = self.weight.size()
-                    self.weight.data = (self.weight.data.t().reshape(self.num_heads,
-                                                                     -1) *
-                                        mask.view(-1,
-                                                  1)).reshape(shape[1],
-                                                              shape[0]).t()
+                    self.weight.data = (self.weight.data.t().reshape(self.num_heads, -1) * mask.view(-1, 1)).reshape(
+                        shape[1], shape[0]).t()
 
                 if self.head_pruning_method == 'topk':
                     del self.head_pruning_scores
@@ -316,37 +298,26 @@ class LinearLayer_Compress(nn.Linear):
             if self.sparse_pruning_method == 'l1':
                 return self.sparse_pruning_mask.to(self.weight.device)
             elif self.sparse_pruning_method == 'topk':
-                return TopKBinarizer.apply(self.sparse_mask_scores,
-                                           self.sparse_pruning_ratio,
-                                           False)
+                return TopKBinarizer.apply(self.sparse_mask_scores, self.sparse_pruning_ratio, False)
             else:
                 raise NotImplementedError
         if pruning_type == 'row':
             if self.row_pruning_method == 'l1':
                 return self.row_pruning_mask.to(self.weight.device)
             elif self.row_pruning_method == 'topk':
-                return TopKBinarizer.apply(self.row_mask_scores,
-                                           self.row_pruning_ratio,
-                                           False)
+                return TopKBinarizer.apply(self.row_mask_scores, self.row_pruning_ratio, False)
             else:
                 raise NotImplementedError
         elif pruning_type == 'head':
             if self.head_pruning_method == 'topk':
-                return TopKBinarizer.apply(self.head_pruning_scores,
-                                           self.head_pruning_ratio,
-                                           False)
+                return TopKBinarizer.apply(self.head_pruning_scores, self.head_pruning_ratio, False)
             else:
                 raise NotImplementedError
         else:
             raise NotImplementedError
 
-    def enable_weight_quantization(self,
-                                   start_bits,
-                                   target_bits,
-                                   quantization_period,
-                                   weight_quantization_enabled_in_forward,
-                                   quantization_type,
-                                   num_groups):
+    def enable_weight_quantization(self, start_bits, target_bits, quantization_period,
+                                   weight_quantization_enabled_in_forward, quantization_type, num_groups):
         self.weight.start_bits = start_bits
         self.weight.target_bits = target_bits
         self.weight.q_period = quantization_period
@@ -369,10 +340,7 @@ class LinearLayer_Compress(nn.Linear):
             self.weight_quantize_num_groups = num_groups
 
     def fix_weight_quantization(self):
-        self.weight.data = self.weight_quantizer(self.weight,
-                                                 self.weight.target_bits,
-                                                 None,
-                                                 None,
+        self.weight.data = self.weight_quantizer(self.weight, self.weight.target_bits, None, None,
                                                  self.weight_quantize_num_groups).data
         self.weight_quantization_enabled_in_forward = False
         return None
@@ -391,18 +359,12 @@ class LinearLayer_Compress(nn.Linear):
 
     def head_pruning_reshape(self, w, mask):
         shape = w.shape
-        return (w.t().reshape(self.num_heads,
-                              -1) * mask.view(-1,
-                                              1)).reshape(shape[1],
-                                                          shape[0]).t()
+        return (w.t().reshape(self.num_heads, -1) * mask.view(-1, 1)).reshape(shape[1], shape[0]).t()
 
     def forward(self, input, skip_bias_add=False):
 
         if self.weight_quantization_enabled_in_forward and self.weight_quantization_enabled:
-            weight = self.weight_quantizer(self.weight,
-                                           self.weight.target_bits,
-                                           None,
-                                           None,
+            weight = self.weight_quantizer(self.weight, self.weight.target_bits, None, None,
                                            self.weight_quantize_num_groups)
             bias = self.bias
         else:
@@ -428,11 +390,7 @@ class LinearLayer_Compress(nn.Linear):
                 num_groups = input.numel() // input.size(-1)
             else:
                 num_groups = 1
-            input = self.activation_quantizer(input,
-                                              self.activation_quantization_bits,
-                                              None,
-                                              None,
-                                              num_groups)
+            input = self.activation_quantizer(input, self.activation_quantization_bits, None, None, num_groups)
 
         if skip_bias_add:
             # used for mpu linear layers
@@ -447,6 +405,7 @@ class Conv2dLayer_Compress(nn.Conv2d):
     """
     Conv2D layer with compression.
     """
+
     def __init__(self, *kargs):
         super(Conv2dLayer_Compress, self).__init__(*kargs)
         self.sparse_pruning_method = None
@@ -478,10 +437,8 @@ class Conv2dLayer_Compress(nn.Conv2d):
         output = s.format(**self.__dict__)
 
         return output + ' sparse pruning={}, channel pruning={}, activation quantization={}, weight_quantization={}'.format(
-            self.sparse_pruning_method is not None,
-            self.channel_pruning_method is not None,
-            self.activation_quantization_method is not None,
-            self.weight.target_bits)
+            self.sparse_pruning_method is not None, self.channel_pruning_method is not None,
+            self.activation_quantization_method is not None, self.weight.target_bits)
 
     def enable_sparse_pruning(self, ratio, method):
         self.sparse_pruning_ratio = ratio
@@ -493,8 +450,7 @@ class Conv2dLayer_Compress(nn.Conv2d):
             mask = mask.to(self.weight.device)
         elif method == 'topk':
             self.sparse_mask_scores = nn.Parameter(torch.Tensor(self.weight.size()))
-            self.sparse_mask_scores.data = self.sparse_mask_scores.data.to(
-                self.weight.device)
+            self.sparse_mask_scores.data = self.sparse_mask_scores.data.to(self.weight.device)
             init.kaiming_uniform_(self.sparse_mask_scores, a=math.sqrt(5))
             mask = None
         else:
@@ -514,13 +470,8 @@ class Conv2dLayer_Compress(nn.Conv2d):
             mask = mask.view(-1, 1, 1, 1)
             mask = mask.to(self.weight.device)
         elif method == 'topk':
-            self.channel_mask_scores = nn.Parameter(
-                torch.Tensor(self.weight.size(0),
-                             1,
-                             1,
-                             1))
-            self.channel_mask_scores.data = self.channel_mask_scores.data.to(
-                self.weight.device)
+            self.channel_mask_scores = nn.Parameter(torch.Tensor(self.weight.size(0), 1, 1, 1))
+            self.channel_mask_scores.data = self.channel_mask_scores.data.to(self.weight.device)
             init.kaiming_uniform_(self.channel_mask_scores, a=math.sqrt(5))
             mask = None
         else:
@@ -579,39 +530,27 @@ class Conv2dLayer_Compress(nn.Conv2d):
             if self.sparse_pruning_method == 'l1':
                 return self.sparse_pruning_mask.to(self.weight.device)
             elif self.sparse_pruning_method == 'topk':
-                return TopKBinarizer.apply(self.sparse_mask_scores,
-                                           self.sparse_pruning_ratio,
-                                           False)
+                return TopKBinarizer.apply(self.sparse_mask_scores, self.sparse_pruning_ratio, False)
             else:
                 raise NotImplementedError
         elif pruning_type == 'channel':
             if self.channel_pruning_method == 'l1':
                 return self.channel_pruning_mask.to(self.weight.device)
             elif self.channel_pruning_method == 'topk':
-                return TopKBinarizer.apply(self.channel_mask_scores,
-                                           self.channel_pruning_ratio,
-                                           False)
+                return TopKBinarizer.apply(self.channel_mask_scores, self.channel_pruning_ratio, False)
             else:
                 raise NotImplementedError
         else:
             raise NotImplementedError
 
     def fix_weight_quantization(self):
-        self.weight.data = self.weight_quantizer(self.weight,
-                                                 self.weight.target_bits,
-                                                 None,
-                                                 None,
+        self.weight.data = self.weight_quantizer(self.weight, self.weight.target_bits, None, None,
                                                  self.weight_quantize_num_groups).data
         self.weight_quantization_enabled_in_forward = False
         return None
 
-    def enable_weight_quantization(self,
-                                   start_bits,
-                                   target_bits,
-                                   quantization_period,
-                                   weight_quantization_enabled_in_forward,
-                                   quantization_type,
-                                   num_groups):
+    def enable_weight_quantization(self, start_bits, target_bits, quantization_period,
+                                   weight_quantization_enabled_in_forward, quantization_type, num_groups):
         self.weight.start_bits = start_bits
         self.weight.target_bits = target_bits
         self.weight.q_period = quantization_period
@@ -642,10 +581,7 @@ class Conv2dLayer_Compress(nn.Conv2d):
     def forward(self, input):
 
         if self.weight_quantization_enabled_in_forward and self.weight_quantization_enabled:
-            weight = self.weight_quantizer(self.weight,
-                                           self.weight.target_bits,
-                                           None,
-                                           None,
+            weight = self.weight_quantizer(self.weight, self.weight.target_bits, None, None,
                                            self.weight_quantize_num_groups)
             bias = self.bias
         else:
@@ -667,22 +603,13 @@ class Conv2dLayer_Compress(nn.Conv2d):
                 num_groups = input.numel() // input[0].numel()
             else:
                 num_groups = 1
-            input = self.activation_quantizer(input,
-                                              self.activation_quantization_bits,
-                                              None,
-                                              None,
-                                              num_groups)
+            input = self.activation_quantizer(input, self.activation_quantization_bits, None, None, num_groups)
 
-        return nn.functional.conv2d(input,
-                                    weight,
-                                    bias,
-                                    self.stride,
-                                    self.padding,
-                                    self.dilation,
-                                    self.groups)
+        return nn.functional.conv2d(input, weight, bias, self.stride, self.padding, self.dilation, self.groups)
 
 
 class BNLayer_Compress(nn.BatchNorm2d):
+
     def fix_channel_pruning_helper(self, mask, dim_reduction=True):
         self.weight = nn.Parameter(self.weight.data[mask.view(-1)])
         self.bias = nn.Parameter(self.bias.data[mask.view(-1)])
@@ -770,6 +697,7 @@ def _gather(input_):
 
 class _CopyToModelParallelRegion(torch.autograd.Function):
     """Pass the input to the model parallel region."""
+
     @staticmethod
     def forward(ctx, input_):
         return input_
@@ -781,6 +709,7 @@ class _CopyToModelParallelRegion(torch.autograd.Function):
 
 class _ReduceFromModelParallelRegion(torch.autograd.Function):
     """All-redcue the input from the model parallel region."""
+
     @staticmethod
     def forward(ctx, input_):
         return _reduce(input_)
@@ -792,6 +721,7 @@ class _ReduceFromModelParallelRegion(torch.autograd.Function):
 
 class _ScatterToModelParallelRegion(torch.autograd.Function):
     """Split the input and keep only the corresponding chuck to the rank."""
+
     @staticmethod
     def forward(ctx, input_):
         return _split(input_)
@@ -803,6 +733,7 @@ class _ScatterToModelParallelRegion(torch.autograd.Function):
 
 class _GatherFromModelParallelRegion(torch.autograd.Function):
     """Gather the input from model parallel region and concatinate."""
+
     @staticmethod
     def forward(ctx, input_):
         return _gather(input_)
@@ -834,13 +765,8 @@ def gather_from_model_parallel_region(input_):
 
 
 class ColumnParallelLinear_Compress(LinearLayer_Compress):
-    def __init__(self,
-                 mpu,
-                 input_size,
-                 output_size,
-                 bias=True,
-                 gather_output=True,
-                 skip_bias_add=False):
+
+    def __init__(self, mpu, input_size, output_size, bias=True, gather_output=True, skip_bias_add=False):
         # Keep input parameters
         global g_mpu
         g_mpu = mpu
@@ -854,10 +780,7 @@ class ColumnParallelLinear_Compress(LinearLayer_Compress):
         assert output_size % world_size == 0
         self.output_size_per_partition = output_size // world_size
 
-        super(ColumnParallelLinear_Compress,
-              self).__init__(self.input_size,
-                             self.output_size_per_partition,
-                             bias=bias)
+        super(ColumnParallelLinear_Compress, self).__init__(self.input_size, self.output_size_per_partition, bias=bias)
 
     def forward(self, input_):
         # Set up backprop all-reduce.
@@ -877,13 +800,8 @@ class ColumnParallelLinear_Compress(LinearLayer_Compress):
 
 
 class RowParallelLinear_Compress(LinearLayer_Compress):
-    def __init__(self,
-                 mpu,
-                 input_size,
-                 output_size,
-                 bias=True,
-                 input_is_parallel=False,
-                 skip_bias_add=False):
+
+    def __init__(self, mpu, input_size, output_size, bias=True, input_is_parallel=False, skip_bias_add=False):
         # Keep input parameters
         global g_mpu
         g_mpu = mpu
@@ -897,10 +815,7 @@ class RowParallelLinear_Compress(LinearLayer_Compress):
         assert input_size % world_size == 0
         self.input_size_per_partition = input_size // world_size
 
-        super(RowParallelLinear_Compress,
-              self).__init__(self.input_size_per_partition,
-                             self.output_size,
-                             bias=bias)
+        super(RowParallelLinear_Compress, self).__init__(self.input_size_per_partition, self.output_size, bias=bias)
 
     def forward(self, input_):
         # Set up backprop all-reduce.

deepspeed/compression/compress.py

-'''Copyright The Microsoft DeepSpeed Team'''
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
 
 import re
 from .helper import compression_preparation, fix_compression, recursive_getattr, is_module_compressible
@@ -13,21 +16,13 @@ def check_deepspeed_config(config):
     if isinstance(config, dict):
         return config
     elif os.path.exists(config):
-        return json.load(open(config,
-                              "r"),
-                         object_pairs_hook=dict_raise_error_on_duplicate_keys)
+        return json.load(open(config, "r"), object_pairs_hook=dict_raise_error_on_duplicate_keys)
     else:
         raise ValueError(
-            f"Expected a string path to an existing deepspeed config, or a dictionary. Received: {config}"
-        )
+            f"Expected a string path to an existing deepspeed config, or a dictionary. Received: {config}")
 
 
-def get_module_name(group_name,
-                    model,
-                    key_word,
-                    exist_module_name,
-                    mpu=None,
-                    verbose=True):
+def get_module_name(group_name, model, key_word, exist_module_name, mpu=None, verbose=True):
     '''
     get the associated module name from the model based on the key_word provided by users
     '''
@@ -40,8 +35,7 @@ def get_module_name(group_name,
             if name in exist_module_name and verbose:
                 # logger.warning
                 raise ValueError(
-                    f"{name} is already added to compression, please check your config file for {group_name}."
-                )
+                    f"{name} is already added to compression, please check your config file for {group_name}.")
             if name not in exist_module_name:
                 exist_module_name.add(name)
                 return_module_name.append(name)
@@ -56,8 +50,7 @@ def get_compress_methods(model, compress_methods, mpu=None):
             continue
         # for loop different methods, i.e., weight quantization, activation quantization etc
         exist_module_name = set()
-        shared_parameters = method_content[
-            SHARED_PARAMETERS]  # get all the shared parameters
+        shared_parameters = method_content[SHARED_PARAMETERS]  # get all the shared parameters
         for group_name, method_parameters in method_content[DIFFERENT_GROUPS].items():
             # for loop different groups, i.e., weight quantization group 1, weight quantization group 2 etc
             module_name_list = []
@@ -65,8 +58,13 @@ def get_compress_methods(model, compress_methods, mpu=None):
             if method_parameters[DIFFERENT_GROUPS_RELATED_MODULE_SCOPE]:
                 # this is used for head/row/channel pruning, if users provide the related module scope, we can shrink the layer dim for them
                 # otherwise we just mask those as zeros
-                for key_word, related_key_words in zip(method_parameters[DIFFERENT_GROUPS_MODULE_SCOPE], method_parameters[DIFFERENT_GROUPS_RELATED_MODULE_SCOPE]):
-                    module_name, exist_module_name = get_module_name(group_name, model, key_word, exist_module_name, mpu=mpu)
+                for key_word, related_key_words in zip(method_parameters[DIFFERENT_GROUPS_MODULE_SCOPE],
+                                                       method_parameters[DIFFERENT_GROUPS_RELATED_MODULE_SCOPE]):
+                    module_name, exist_module_name = get_module_name(group_name,
+                                                                     model,
+                                                                     key_word,
+                                                                     exist_module_name,
+                                                                     mpu=mpu)
                     module_name_list.append(module_name)
                     tmp_related_module_name_list = []
                     for rkw in related_key_words:
@@ -76,7 +74,11 @@ def get_compress_methods(model, compress_methods, mpu=None):
                     related_module_name_list.append(tmp_related_module_name_list)
             else:
                 for key_word in method_parameters[DIFFERENT_GROUPS_MODULE_SCOPE]:
-                    module_name, exist_module_name = get_module_name(group_name, model, key_word, exist_module_name, mpu=mpu)
+                    module_name, exist_module_name = get_module_name(group_name,
+                                                                     model,
+                                                                     key_word,
+                                                                     exist_module_name,
+                                                                     mpu=mpu)
                     module_name_list.append(module_name)
 
             if module_name_list:
@@ -85,13 +87,7 @@ def get_compress_methods(model, compress_methods, mpu=None):
                     **(method_parameters.copy().pop(DIFFERENT_GROUPS_PARAMETERS)),
                     **shared_parameters
                 }
-                compression_item = [
-                    module_name_list,
-                    related_module_name_list,
-                    {
-                        method: combined_method_parameters
-                    }
-                ]
+                compression_item = [module_name_list, related_module_name_list, {method: combined_method_parameters}]
                 layer_added_compress_methods.append(compression_item)
     return layer_added_compress_methods
 
@@ -118,9 +114,7 @@ def init_compression(model, deepspeed_config, teacher_model=None, mpu=None):
         assert teacher_model is not None, "Teacher model is required for layer reduction"
         student_initialization(c_model, teacher_model, deepspeed_config)
 
-    layer_added_compress_methods = get_compress_methods(c_model,
-                                                        compress_methods,
-                                                        mpu=mpu)
+    layer_added_compress_methods = get_compress_methods(c_model, compress_methods, mpu=mpu)
     compression_preparation(c_model, layer_added_compress_methods, mpu)
 
     return model
@@ -143,20 +137,12 @@ def redundancy_clean(model, deepspeed_config, mpu=None):
     else:
         c_model = model
 
-    layer_added_compress_methods_tmp = get_compress_methods(c_model,
-                                                            compress_methods,
-                                                            mpu=mpu)
+    layer_added_compress_methods_tmp = get_compress_methods(c_model, compress_methods, mpu=mpu)
     # sort methods
     order_list = [
-        WEIGHT_QUANTIZATION,
-        SPARSE_PRUNING,
-        ROW_PRUNING,
-        HEAD_PRUNING,
-        CHANNEL_PRUNING,
-        ACTIVATION_QUANTIZATION
+        WEIGHT_QUANTIZATION, SPARSE_PRUNING, ROW_PRUNING, HEAD_PRUNING, CHANNEL_PRUNING, ACTIVATION_QUANTIZATION
     ]
-    layer_added_compress_methods = sorted(
-        layer_added_compress_methods_tmp,
+    layer_added_compress_methods = sorted(layer_added_compress_methods_tmp,
                                           key=lambda x: order_list.index(list(x[2].keys())[0]))
 
     for module_name_lists, related_module_name_lists, compression_technique in layer_added_compress_methods:
@@ -164,10 +150,7 @@ def redundancy_clean(model, deepspeed_config, mpu=None):
         need_mask = True if related_module_name_lists else False
         for i, mnl in enumerate(module_name_lists):
             for module_name in mnl:
-                mask = fix_compression(c_model,
-                                       module_name,
-                                       compression_technique,
-                                       dim_reduction=need_mask)
+                mask = fix_compression(c_model, module_name, compression_technique, dim_reduction=need_mask)
                 if need_mask:
                     stored_mask.append(mask)
             if need_mask:
@@ -219,10 +202,8 @@ def student_initialization(student_model, teacher_model, deepspeed_config):
     '''
     assert len(student_layer) == len(teacher_layer)
     for s_name, t_name in zip(student_layer, teacher_layer):
-        s_module = recursive_getattr(student_model,
-                                     module_name_prefix + '.' + str(s_name))
-        t_module = recursive_getattr(teacher_model,
-                                     module_name_prefix + '.' + str(t_name))
+        s_module = recursive_getattr(student_model, module_name_prefix + '.' + str(s_name))
+        t_module = recursive_getattr(teacher_model, module_name_prefix + '.' + str(t_name))
         for s_param, t_param in zip(s_module.parameters(), t_module.parameters()):
             s_param.data.copy_(t_param.data)
     for name in other_module_name: