[autoparallel] Patch meta information of `torch.nn.Embedding` (#2760)

* [autoparallel] embedding metainfo

* [autoparallel] fix function name in test_activation_metainfo

* [autoparallel] undo changes in activation metainfo and related tests

colossalai/auto_parallel/meta_profiler/meta_registry/__init__.py

 from .activation import *
 from .binary_elementwise_ops import *
 from .conv import *
+from .embedding import *
 from .linear import *
 from .norm import *
 from .pooling import *

colossalai/auto_parallel/meta_profiler/meta_registry/embedding.py

+from typing import List, Tuple
+
+import torch
+
+from colossalai.auto_parallel.tensor_shard.sharding_strategy import MemoryCost, OperationDataType, TrainCycleItem
+from colossalai.fx.profiler.memory_utils import activation_size
+from colossalai.fx.profiler.opcount import flop_mapping
+
+from ..registry import meta_register
+
+__all__ = ["embedding_meta_info"]
+
+
+@meta_register.register(torch.nn.Embedding)
+def embedding_meta_info(*args, **kwargs) -> Tuple[TrainCycleItem, TrainCycleItem, List[torch.Tensor]]:
+    """torch.nn.Embedding metainfo generator
+
+    Returns:
+        Tuple[TrainCycleItem, TrainCycleItem, List[torch.Tensor]]: compute cost, memory cost and forward inputs
+    """
+    input_tensor = next(filter(lambda x: x.type == OperationDataType.ARG, args)).data
+    weight_tensor = next(filter(lambda x: x.type == OperationDataType.PARAM, args)).data
+    output_tensor = next(filter(lambda x: x.type == OperationDataType.OUTPUT, args)).data
+
+    # compute cost
+    fwd_compute_cost = flop_mapping[torch.ops.aten.embedding.default]([weight_tensor, input_tensor], [output_tensor])
+    bwd_compute_cost = flop_mapping[torch.ops.aten.embedding_dense_backward.default]([output_tensor, weight_tensor],
+                                                                                     [weight_tensor])
+
+    compute_cost = TrainCycleItem(fwd=fwd_compute_cost, bwd=bwd_compute_cost, total=fwd_compute_cost + bwd_compute_cost)
+
+    # memory cost
+    # NOTE: currently in SPMD solver we always believe that there will be a new tensor created in forward
+    # NOTE: during the backward phase of torch.nn.Embedding, it seems when the input is large enough, it will
+    # have a temp memory which is kind of weird and we don't know the reason yet, so currently we just assume
+    # that there will be no temp memory, as the temp memory is significantly smaller than the gradient memory
+    fwd_memory_cost = MemoryCost(activation=activation_size([input_tensor, output_tensor]),
+                                 parameter=0,
+                                 temp=0,
+                                 buffer=0)
+    bwd_memory_cost = MemoryCost(activation=activation_size([weight_tensor]), parameter=0, temp=0, buffer=0)
+
+    total_memory_cost = MemoryCost(activation=fwd_memory_cost.activation + bwd_memory_cost.activation)
+
+    memory_cost = TrainCycleItem(fwd=fwd_memory_cost, bwd=bwd_memory_cost, total=total_memory_cost)
+
+    # store fwd_in, fwd_buffer, fwd_out
+    fwd_in = [torch.zeros_like(input_tensor)]
+    fwd_buffer = []
+    fwd_out = [torch.zeros_like(output_tensor)]
+
+    return compute_cost, memory_cost, fwd_in, fwd_buffer, fwd_out

tests/test_auto_parallel/test_tensor_shard/test_metainfo/test_embedding_metainfo.py

+from functools import partial
+
+import pytest
+import torch
+import torch.multiprocessing as mp
+import torch.nn as nn
+
+from colossalai.auto_parallel.tensor_shard.node_handler import LinearModuleHandler
+from colossalai.auto_parallel.tensor_shard.sharding_strategy import (
+    MemoryCost,
+    OperationData,
+    OperationDataType,
+    ShardingStrategy,
+    StrategiesVector,
+    TrainCycleItem,
+)
+from colossalai.device.device_mesh import DeviceMesh
+from colossalai.fx import ColoGraphModule, ColoTracer
+from colossalai.initialize import launch
+from colossalai.logging import disable_existing_loggers
+from colossalai.testing.pytest_wrapper import run_on_environment_flag
+from colossalai.testing.utils import parameterize, rerun_if_address_is_in_use
+from colossalai.utils import free_port
+from tests.test_auto_parallel.test_tensor_shard.test_metainfo.utils import print_results
+
+if torch.__version__ >= '1.12.0':
+    from colossalai.auto_parallel.meta_profiler import MetaInfo, meta_register
+
+
+@pytest.mark.skipif(torch.__version__ < '1.12.0', reason="need pytorch 1.12.0 or higher for aten level operations")
+def test_embedding_meta_info():
+    meta_func = meta_register.get(torch.nn.Embedding)
+
+    # construct meta tensors
+    input_tensor = torch.randint(0, 50256, (8, 1024), device="meta")
+    weight_tensor = torch.rand(50257, 1024, device="meta")
+    output_tensor = torch.rand(8, 1024, 1024, device="meta")
+
+    # construct operation data
+    input_data = OperationData(name="input", type=OperationDataType.ARG, data=input_tensor)
+
+    weight_data = OperationData(name="weight", type=OperationDataType.PARAM, data=weight_tensor)
+
+    output_data = OperationData(name="output", type=OperationDataType.OUTPUT, data=output_tensor)
+
+    # construct args and kwargs
+    args = [input_data, weight_data, output_data]
+    kwargs = {'inplace': False}
+
+    # estimated results
+    compute_cost, memory_cost, fwd_in, fwd_buffer, fwd_out = meta_func(*args, **kwargs)
+
+    # actual results
+    input_real_tensor = torch.randint(0, 50256, (8, 1024), device="cuda")
+    embedding_module = torch.nn.Embedding(50257, 1024).cuda()
+
+    # fwd
+    torch.cuda.reset_peak_memory_stats()
+    mem_stamp0 = torch.cuda.memory_allocated()
+    output_real_tensor = embedding_module(input_real_tensor)
+    fwd_allocated = torch.cuda.memory_allocated() - mem_stamp0
+    fwd_peak = torch.cuda.max_memory_allocated() - mem_stamp0
+
+    # bwd
+    upstream_grad = torch.rand_like(output_real_tensor)
+    torch.cuda.reset_peak_memory_stats()
+    mem_stamp0 = torch.cuda.memory_allocated()
+    torch.autograd.backward(output_real_tensor, upstream_grad)
+    bwd_allocated = torch.cuda.memory_allocated() - mem_stamp0
+    bwd_peak = torch.cuda.max_memory_allocated() - mem_stamp0
+
+    print_results([input_real_tensor], [output_real_tensor], compute_cost, memory_cost, fwd_allocated, fwd_peak,
+                  bwd_allocated, bwd_peak)
+
+
+if __name__ == '__main__':
+    test_embedding_meta_info()