[zero] refactor model data tracing (#537)

colossalai/engine/ophooks/zero_hook.py

@@ -5,8 +5,6 @@ import torch.distributed as dist
 from colossalai.registry import OPHOOKS
 from colossalai.utils import get_current_device
 from colossalai.utils.memory_tracer.memstats_collector import MemStatsCollector
-from colossalai.utils.memory_tracer.model_data_memtracer import \
-    GLOBAL_MODEL_DATA_TRACER
 from colossalai.zero.shard_utils import BaseShardStrategy
 
 from ._base_ophook import BaseOpHook

colossalai/utils/memory_tracer/memstats_collector.py

@@ -3,6 +3,7 @@ from colossalai.utils.memory_utils.memory_monitor import colo_cuda_memory_used
 from colossalai.utils import get_current_device
 
 import torch
+from typing import Tuple
 
 
 class SamplingCounter:
@@ -40,6 +41,20 @@ class MemStatsCollector:
 
         self._start_flag = False
 
+    @property
+    def overall_cuda(self):
+        return self._overall_cuda
+
+    @property
+    def model_data_cuda(self):
+        return self._model_data_cuda
+
+    @property
+    def non_model_data_cuda(self):
+        """Non model data stats
+        """
+        return [(v1 - v2) for v1, v2 in zip(self._overall_cuda, self._model_data_cuda)]
+
     def start_collection(self):
         self._start_flag = True
 
@@ -58,7 +73,7 @@ class MemStatsCollector:
             self._overall_cuda.append(colo_cuda_memory_used(torch.device(f'cuda:{get_current_device()}')))
         self._sampling_cnter.advance()
 
-    def fetch_memstats(self) -> (int, int):
+    def fetch_memstats(self) -> Tuple[int, int]:
         """
         returns cuda usage of model data and overall cuda usage.
         """

colossalai/utils/memory_tracer/model_data_memtracer.py

 from colossalai.context.singleton_meta import SingletonMeta
 from colossalai.zero.sharded_param.sharded_tensor import ShardedTensor
 import torch
-from typing import Union
+from typing import Union, Tuple, Optional
+from colossalai.logging import DistributedLogger
 
 
 def _col_tensor_mem_usage(t: Union[torch.Tensor, ShardedTensor]) -> int:
@@ -12,60 +13,78 @@ def _col_tensor_mem_usage(t: Union[torch.Tensor, ShardedTensor]) -> int:
     return target.numel() * target.element_size()
 
 
-class ModelDataTracer(metaclass=SingletonMeta):
+def col_model_data_mem_usage(model: torch.nn.Module) -> Tuple[int, int]:
     """ 
-    A tracer singleton to trace model data usage during runtime.
-    The tracer is designed to trace the memory layout change during model-data tensors allocation, releasing, and moving.
-    To achieve this goal, the developers have to call `ModelDataTracer` in the corresponding code explicitly.
-    NOTE() now the class only trace cuda memory usage
+    Trace the model memory usage.
+    Args:
+        model (torch.nn.Module): a torch model
+
+    Returns:
+        Tuple[int, int]: cuda memory usage in Byte, cpu memory usage in Byte
     """
 
-    def __init__(self) -> None:
-        self._cuda_usage = 0
-        self._cpu_usage = 0
-        self._start_flag = False
+    def _get_tensor_mem_use(t: Optional[torch.Tensor]):
+        if t is None:
+            return
+        assert isinstance(t, torch.Tensor)
+        _cpu_mem_usage, _cuda_mem_usage = 0, 0
+        if t.device.type == 'cpu':
+            _cpu_mem_usage += t.numel() * t.element_size()
+        elif t.device.type == 'cuda':
+            _cuda_mem_usages += t.numel() * t.element_size()
+        return _cuda_mem_usage, _cpu_mem_usage
 
-    def start(self) -> None:
-        self._start_flag = True
+    cuda_mem_usage = 0
+    cpu_mem_usage = 0
+    for param in model.parameters():
+        if hasattr(param, 'col_attr'):
+            para_cuda, param_cpu = param.col_attr.get_memory_usage()
+            cuda_mem_usage += para_cuda
+            cpu_mem_usage += param_cpu
+        else:
+            t_cuda, t_cpu = _get_tensor_mem_use(param.data)
+            cuda_mem_usage += t_cuda
+            cpu_mem_usage += t_cpu
+            t_cuda, t_cpu = _get_tensor_mem_use(param.grad)
+            cuda_mem_usage += t_cuda
+            cpu_mem_usage += t_cpu
 
-    def close(self) -> None:
-        self._start_flag = False
+    return cuda_mem_usage, cpu_mem_usage
 
-    def add_tensor(self, t: Union[torch.Tensor, ShardedTensor]) -> None:
-        if not self._start_flag:
-            return
-        t_payload = t.payload if isinstance(t, ShardedTensor) else t
-        mem_use = _col_tensor_mem_usage(t_payload)
-        if t_payload.device.type == 'cuda':
-            self._cuda_usage += mem_use
-        elif t_payload.device.type == 'cpu':
-            self._cpu_usage += mem_use
-        else:
-            raise TypeError
 
-    def delete_tensor(self, t: Union[torch.Tensor, ShardedTensor]) -> None:
-        if not self._start_flag:
-            return
-        t_payload = t.payload if isinstance(t, ShardedTensor) else t
-        mem_use = _col_tensor_mem_usage(t_payload)
-        if t_payload.device.type == 'cuda':
-            self._cuda_usage -= mem_use
-        elif t_payload.device.type == 'cpu':
-            self._cpu_usage -= mem_use
-        else:
-            raise TypeError
+class ModelDataTracer(metaclass=SingletonMeta):
+    """
+    A tracer singleton to trace model data usage during runtime.
+    You have to register a model on the singleton first.
+    """
+
+    def __init__(self) -> None:
+        self._logger = DistributedLogger("ModelDataTracer")
+        self._model = None
+
+    def _get_mem_usage(self) -> Tuple[int, int]:
+        """
+        get the memory usage of the model registered.
+        Returns:
+            Tuple[int, int]: cuda, cpu mem usage
+        """
+        if self._model is None:
+            self._logger.warning("The Global ModelDataTracer is using, but no model is registered on it.")
+            return 0, 0
+        return col_model_data_mem_usage(self._model)
 
-    def clear(self) -> None:
-        self._cuda_usage = 0
-        self._cpu_usage = 0
+    def register_model(self, model) -> None:
+        self._model = model
 
     @property
     def cpu_usage(self):
-        return self._cpu_usage
+        _, cpu_usage = self._get_mem_usage()
+        return cpu_usage
 
     @property
     def cuda_usage(self):
-        return self._cuda_usage
+        cuda_usage, _ = self._get_mem_usage()
+        return cuda_usage
 
 
 GLOBAL_MODEL_DATA_TRACER = ModelDataTracer()

colossalai/utils/memory_tracer/test_memstats_collector.py

 from colossalai.utils.memory_tracer.memstats_collector import MemStatsCollector
-from colossalai.utils.memory_tracer.model_data_memtracer import GLOBAL_MODEL_DATA_TRACER
 import torch
 
 
@@ -14,7 +13,6 @@ def test_mem_collector():
     collector.sample_memstats()
 
     m_a = torch.randn(10).cuda()
-    GLOBAL_MODEL_DATA_TRACER.add_tensor(m_a)
     b = torch.randn(10).cuda()
 
     # sampling at time 1
@@ -35,8 +33,7 @@ def test_mem_collector():
     cuda_use, overall_use = collector.fetch_memstats()
     print(cuda_use, overall_use)
 
-    print(collector._model_data_cuda)
-    print(collector._overall_cuda)
+    print(collector.overall_cuda)
 
 
 if __name__ == '__main__':

colossalai/utils/memory_utils/utils.py

 import torch
 from colossalai.utils import get_current_device
 from colossalai.zero.sharded_param.sharded_tensor import ShardedTensor
-from colossalai.utils.memory_tracer.model_data_memtracer import GLOBAL_MODEL_DATA_TRACER
 
 from typing import Union
 
@@ -52,9 +51,7 @@ def colo_model_data_tensor_move(src_t: Union[ShardedTensor, torch.Tensor], tgt_t
         tgt_t_payload = tgt_t.data
     tgt_dev = tgt_t_payload.device
 
-    GLOBAL_MODEL_DATA_TRACER.delete_tensor(src_t_payload)
     tgt_t_payload.copy_(src_t_payload)
-    GLOBAL_MODEL_DATA_TRACER.add_tensor(tgt_t_payload)
 
     # remove payload of src_t
     if isinstance(src_t, ShardedTensor):
@@ -84,11 +81,7 @@ def colo_model_data_tensor_move_inline(t: Union[ShardedTensor, torch.Tensor],
     # deal with torch.device('cpu') and torch.device('cpu:0)
     if t_payload.device.type == target_device.type:
         return
-    if use_tracer:
-        GLOBAL_MODEL_DATA_TRACER.delete_tensor(t_payload)
     t_payload.data = t_payload.data.to(target_device)
-    if use_tracer:
-        GLOBAL_MODEL_DATA_TRACER.add_tensor(t_payload)
 
 
 def colo_model_data_move_to_cpu(t: Union[ShardedTensor, torch.Tensor]) -> None:
@@ -111,9 +104,7 @@ def colo_model_data_move_to_cpu(t: Union[ShardedTensor, torch.Tensor]) -> None:
         return
 
     # TODO() optimize the tensor moving with non-blocking
-    GLOBAL_MODEL_DATA_TRACER.delete_tensor(t_payload)
     t_payload.data = t_payload.data.cpu()
-    GLOBAL_MODEL_DATA_TRACER.add_tensor(t_payload)
 
 
 def colo_model_tensor_clone(t: Union[ShardedTensor, torch.Tensor], target_device: torch.device) -> torch.Tensor:
@@ -129,5 +120,4 @@ def colo_model_tensor_clone(t: Union[ShardedTensor, torch.Tensor], target_device
     t_payload = t.payload if isinstance(t, ShardedTensor) else t
 
     ret = t_payload.to(target_device)
-    GLOBAL_MODEL_DATA_TRACER.add_tensor(ret)
     return ret

colossalai/zero/init_ctx/init_context.py

@@ -4,8 +4,6 @@ from typing import Optional
 import torch
 from colossalai.context.parallel_mode import ParallelMode
 from colossalai.core import global_context as gpc
-from colossalai.utils.memory_tracer.model_data_memtracer import \
-    GLOBAL_MODEL_DATA_TRACER
 from colossalai.utils.memory_utils.memory_monitor import colo_cuda_memory_used
 from colossalai.zero.shard_utils import BaseShardStrategy
 from colossalai.zero.sharded_model._utils import cast_tensor_to_fp16
@@ -130,7 +128,6 @@ class ZeroInitContext(InsertPostInitMethodToModuleSubClasses):
         The Callback function when entering the context
         """
         self.logger = get_dist_logger("ZeroInitContext")
-        GLOBAL_MODEL_DATA_TRACER.start()
 
     def _post_context_exec(self):
         """The callback function when exiting context.
@@ -141,12 +138,6 @@ class ZeroInitContext(InsertPostInitMethodToModuleSubClasses):
                 param.col_attr.remove_torch_payload()
 
             del self.initialized_param_list
-        GLOBAL_MODEL_DATA_TRACER.close()
-        model_data_cuda_mem_MB = GLOBAL_MODEL_DATA_TRACER.cuda_usage / 1e6
-        self.logger.info(f"Existing ZeRO Context.\nModel Data CUDA Memory {model_data_cuda_mem_MB} MB", ranks=[0])
-        sys_cuda_mem_MB = colo_cuda_memory_used() / 1e6
-        self.logger.info(f"System CUDA Memory Usage {sys_cuda_mem_MB} MB", ranks=[0])
-        self.logger.info(f"Model Number Parameter {self.model_numel_tensor.numpy()[0]/1e6} M", ranks=[0])
 
     def _post_init_method(self, module: torch.nn.Module):
         """
@@ -176,9 +167,6 @@ class ZeroInitContext(InsertPostInitMethodToModuleSubClasses):
             param.col_attr = ShardedParamV2(param, rm_torch_payload=self.rm_torch_payload_on_the_fly)
 
             self.initialized_param_list.append(param)
-
-            GLOBAL_MODEL_DATA_TRACER.add_tensor(param.col_attr.sharded_data_tensor)
-
             if self.shard_param:
                 self.shard_strategy.shard([param.col_attr.sharded_data_tensor], self.dp_process_group)
 

colossalai/zero/shard_utils/bucket_tensor_shard_strategy.py

@@ -7,7 +7,6 @@ from colossalai.zero.sharded_param.sharded_tensor import ShardedTensor
 from torch._utils import _flatten_dense_tensors as flatten
 
 from .tensor_shard_strategy import TensorShardStrategy
-from colossalai.utils.memory_tracer.model_data_memtracer import GLOBAL_MODEL_DATA_TRACER
 
 
 class BucketTensorShardStrategy(TensorShardStrategy):
@@ -18,8 +17,6 @@ class BucketTensorShardStrategy(TensorShardStrategy):
     """
 
     def gather(self, tensor_list: List[ShardedTensor], process_group: Optional[dist.ProcessGroup] = None):
-        for t in tensor_list:
-            GLOBAL_MODEL_DATA_TRACER.delete_tensor(t)
 
         tensor_list: List[ShardedTensor] = [t for t in tensor_list if t.is_sharded]
         if len(tensor_list) == 0:
@@ -50,6 +47,3 @@ class BucketTensorShardStrategy(TensorShardStrategy):
             t.reset_payload(gathered_payload)
             t.is_sharded = False
             offset += tensor_numels[i]
-
-        for t in tensor_list:
-            GLOBAL_MODEL_DATA_TRACER.add_tensor(t)

colossalai/zero/shard_utils/tensor_shard_strategy.py

@@ -7,7 +7,6 @@ from colossalai.utils.memory_utils.utils import colo_model_data_tensor_move, col
 from colossalai.zero.shard_utils import BaseShardStrategy
 from colossalai.zero.shard_utils.commons import get_shard
 from colossalai.zero.sharded_param.sharded_tensor import ShardedTensor
-from colossalai.utils.memory_tracer.model_data_memtracer import GLOBAL_MODEL_DATA_TRACER
 
 
 class TensorShardStrategy(BaseShardStrategy):
@@ -36,10 +35,8 @@ class TensorShardStrategy(BaseShardStrategy):
         if t.payload.device.type == 'cuda':
             assert t.payload.device.index == get_current_device(), f"shard tensor on cuda device index {t.payload.device.index},"\
                 f" but current cuda device is {get_current_device()}"
-        GLOBAL_MODEL_DATA_TRACER.delete_tensor(t.payload)
         sharded_payload, _ = get_shard(t.payload, dist.get_rank(process_group), dist.get_world_size(process_group))
         t.reset_payload(sharded_payload)
-        GLOBAL_MODEL_DATA_TRACER.add_tensor(t.payload)
         t.is_sharded = True
 
     def _gather_tensor(self, t: ShardedTensor, process_group: Optional[dist.ProcessGroup] = None):
@@ -56,10 +53,8 @@ class TensorShardStrategy(BaseShardStrategy):
             else:
                 buffer_list.append(torch.zeros(payload_numel, dtype=t.dtype, device=get_current_device()))
 
-        GLOBAL_MODEL_DATA_TRACER.delete_tensor(t.payload)
         dist.all_gather(buffer_list, buffer_list[rank], group=process_group, async_op=False)
         gathered_payload = torch.narrow(torch.cat(buffer_list), 0, 0, t.origin_numel).reshape(t.origin_shape)
         t.reset_payload(gathered_payload)
         colo_model_data_tensor_move_inline(t, target_device, use_tracer=False)
-        GLOBAL_MODEL_DATA_TRACER.delete_tensor(t.payload)
         t.is_sharded = False

colossalai/zero/sharded_model/sharded_model_v2.py

@@ -11,6 +11,7 @@ from colossalai.engine.ophooks import register_ophooks_recursively
 from colossalai.engine.ophooks.zero_hook import ZeroHook
 from colossalai.engine.paramhooks import BaseParamHookMgr
 from colossalai.logging import get_dist_logger
+from colossalai.utils.memory_tracer.model_data_memtracer import GLOBAL_MODEL_DATA_TRACER
 from colossalai.utils.memory_utils.utils import colo_model_data_move_to_cpu, colo_cuda_memory_capacity, colo_model_tensor_clone
 from colossalai.utils.memory_tracer.memstats_collector import MemStatsCollector
 from colossalai.zero.shard_utils import BaseShardStrategy
@@ -83,6 +84,7 @@ class ShardedModelV2(nn.Module):
         # Init Memory Statistics Collector
         self._use_memory_tracer = use_memory_tracer
         if self._use_memory_tracer:
+            GLOBAL_MODEL_DATA_TRACER.register_model(self)
             self._memstats_collector = MemStatsCollector()
         else:
             self._memstats_collector = None
@@ -147,14 +149,16 @@ class ShardedModelV2(nn.Module):
     def _update_memstats(self):
         if self._iter_cnter == 0 and self._memstats_collector:
             self._memstats_collector.finish_collection()
+            self.logger.info(f'model data cuda, {self._memstats_collector.model_data_cuda}')
+            self.logger.info(f'non-model data cuda, {self._memstats_collector.non_model_data_cuda}')
+
         if self._memstats_collector:
             self._memstats_collector.reset_sampling_cnter()
             # cuda margin space = cuda mem capacity - max fwd/bwd cuda mem used.
             # the way to calculate margin space is based on the assumption that
             # model data is fixed in cuda during training.
             # cuda margin space can be used to store OS.
-            self._cuda_margin_space = colo_cuda_memory_capacity() - max(self._memstats_collector._overall_cuda)
-
+            self._cuda_margin_space = colo_cuda_memory_capacity() - max(self._memstats_collector.overall_cuda)
         self._iter_cnter += 1
 
     @torch.no_grad()

colossalai/zero/sharded_optim/sharded_optim_v2.py

@@ -9,7 +9,6 @@ from colossalai.context.parallel_mode import ParallelMode
 from colossalai.core import global_context as gpc
 from colossalai.logging import get_dist_logger
 from colossalai.nn.optimizer import ColossalaiOptimizer
-from colossalai.utils.memory_tracer.model_data_memtracer import GLOBAL_MODEL_DATA_TRACER
 from colossalai.zero.sharded_model import ShardedModelV2
 from colossalai.zero.sharded_model._utils import cast_tensor_to_fp32
 from torch import Tensor
@@ -218,9 +217,6 @@ class ShardedOptimizerV2(ColossalaiOptimizer):
         # We must set grad to None
         # Because we will judge whether local grad accumulation
         # is enabled by wheter grad is None
-        for group in self.param_groups:
-            for p in group['params']:
-                GLOBAL_MODEL_DATA_TRACER.delete_tensor(p.grad)
         self.optim.zero_grad(set_to_none=True)
 
     def sync_grad(self):

tests/test_utils/test_commons.py

-from colossalai.utils.memory_tracer.model_data_memtracer import GLOBAL_MODEL_DATA_TRACER
 from colossalai.utils.memory_utils.utils import colo_model_data_tensor_move, colo_model_data_tensor_move_inline
 from colossalai.utils import free_port
 from colossalai.testing import rerun_on_exception
@@ -13,22 +12,15 @@ import torch.multiprocessing as mp
 def run_tensor_move(rank):
     colossalai.launch(config={}, rank=0, world_size=1, host='localhost', port=free_port(), backend='nccl')
 
-    assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage == 0)
-    GLOBAL_MODEL_DATA_TRACER.start()
-
     src_t = torch.ones(2, 3).cuda()
-    GLOBAL_MODEL_DATA_TRACER.add_tensor(src_t)
-    assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage == 24)
     tgt_t = torch.zeros(2, 3)
 
     colo_model_data_tensor_move(src_t, tgt_t)
-    assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage == 0)
     assert (torch.sum(tgt_t) == 6.0), f"{torch.sum(tgt_t.payload)} vs. 6.0"
 
     src_t = torch.ones(2, 3)
     tgt_t = torch.zeros(2, 3).cuda().half()
     colo_model_data_tensor_move(src_t, tgt_t)
-    assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage == 12), f"cuda usage {GLOBAL_MODEL_DATA_TRACER.cuda_usage}"
     # the src_t has been removed
     assert (src_t.numel() == 0)
     assert (torch.sum(tgt_t) == 6.0), f"{torch.sum(tgt_t.payload)} vs. 6.0"
@@ -36,15 +28,11 @@ def run_tensor_move(rank):
     src_t = ShardedTensor(torch.ones(2, 3))
     tgt_t = ShardedTensor(torch.zeros(2, 3).cuda().half())
     colo_model_data_tensor_move(src_t, tgt_t)
-    assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage == 24), f"cuda usage {GLOBAL_MODEL_DATA_TRACER.cuda_usage}"
     assert (torch.sum(tgt_t.payload) == 6.0), f"{torch.sum(tgt_t.payload)} vs. 6.0"
 
     assert (tgt_t.device.type == 'cuda')
     colo_model_data_tensor_move_inline(tgt_t, torch.device('cpu'))
     assert (tgt_t.device.type == 'cpu')
-    assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage == 12), f"cuda usage {GLOBAL_MODEL_DATA_TRACER.cuda_usage}"
-
-    GLOBAL_MODEL_DATA_TRACER.close()
 
 
 @rerun_on_exception(exception_type=mp.ProcessRaisedException, pattern=".*Address already in use.*")

tests/test_utils/test_tensor_move.py

 import pytest
 
 from colossalai.utils.cuda import get_current_device
-from colossalai.utils.memory_tracer.model_data_memtracer import GLOBAL_MODEL_DATA_TRACER
 from colossalai.utils.memory_utils.utils import colo_model_data_tensor_move, colo_model_data_tensor_move_inline
+from colossalai.utils import free_port
 from colossalai.zero.sharded_param import ShardedTensor
-
 import colossalai
 
 import torch
 
 from functools import partial
 import torch.multiprocessing as mp
-from colossalai.utils import free_port
 
 
 def _run_colo_model_data_tensor_move_inline():
-    assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage == 0)
-    GLOBAL_MODEL_DATA_TRACER.start()
-
     for t in [torch.randn(2, 3), ShardedTensor(torch.randn(2, 3))]:
-        GLOBAL_MODEL_DATA_TRACER.add_tensor(t)
-        assert GLOBAL_MODEL_DATA_TRACER.cpu_usage == 2 * 3 * 4
-        assert GLOBAL_MODEL_DATA_TRACER.cuda_usage == 0
         colo_model_data_tensor_move_inline(t, torch.device(f"cuda:{get_current_device()}"))
         assert t.device == torch.device(f"cuda:{get_current_device()}")
-        assert GLOBAL_MODEL_DATA_TRACER.cpu_usage == 0
-        assert GLOBAL_MODEL_DATA_TRACER.cuda_usage == 2 * 3 * 4
-        GLOBAL_MODEL_DATA_TRACER.clear()
-
-    GLOBAL_MODEL_DATA_TRACER.close()
 
 
 def _run_colo_model_data_tensor_move():
-    assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage == 0)
-    GLOBAL_MODEL_DATA_TRACER.start()
-
     for t in [(torch.ones(2, 3), torch.zeros(2, 3).cuda(get_current_device())),
               (ShardedTensor(torch.ones(2, 3)), ShardedTensor(torch.zeros(2, 3).cuda(get_current_device())))]:
         cpu_t, cuda_t = t
-        GLOBAL_MODEL_DATA_TRACER.add_tensor(cpu_t)
-        assert GLOBAL_MODEL_DATA_TRACER.cpu_usage == 2 * 3 * 4
-        assert GLOBAL_MODEL_DATA_TRACER.cuda_usage == 0
         colo_model_data_tensor_move(cpu_t, cuda_t)
-        assert GLOBAL_MODEL_DATA_TRACER.cpu_usage == 0
-        assert GLOBAL_MODEL_DATA_TRACER.cuda_usage == 2 * 3 * 4
-        GLOBAL_MODEL_DATA_TRACER.clear()
-
-    GLOBAL_MODEL_DATA_TRACER.close()
 
 
 def run_dist(rank, world_size, port):

tests/test_zero_data_parallel/test_init_context.py

@@ -10,19 +10,21 @@ import torch.multiprocessing as mp
 from colossalai.testing import parameterize
 from colossalai.utils import free_port
 from colossalai.utils.cuda import get_current_device
-from colossalai.utils.memory_tracer.model_data_memtracer import \
-    GLOBAL_MODEL_DATA_TRACER
+from colossalai.utils.memory_tracer.model_data_memtracer import col_model_data_mem_usage
 from colossalai.zero.init_ctx import ZeroInitContext
+from colossalai.utils.memory_utils.memory_monitor import colo_cuda_memory_used
 from colossalai.zero.shard_utils import (BucketTensorShardStrategy, TensorShardStrategy)
 from colossalai.testing import rerun_on_exception
 from tests.components_to_test.registry import non_distributed_component_funcs
-
+from colossalai.logging import get_dist_logger
 from common import CONFIG
 
 
 @parameterize("init_device_type", ['cpu', 'cuda'])
 @parameterize("shard_strategy_class", [TensorShardStrategy, BucketTensorShardStrategy])
 def run_model_test(init_device_type, shard_strategy_class):
+    logger = get_dist_logger("test_zero_init")
+
     for get_components_func in non_distributed_component_funcs:
         model_builder, _, _, _, _ = get_components_func()
         model_numel_tensor = torch.zeros(1, dtype=torch.int)
@@ -32,6 +34,8 @@ def run_model_test(init_device_type, shard_strategy_class):
             init_device = torch.device("cpu")
         else:
             continue
+
+        model_numel_tensor = torch.zeros(1, dtype=torch.int)
         with ZeroInitContext(convert_fp16=True,
                              target_device=init_device,
                              shard_strategy=shard_strategy_class(),
@@ -46,11 +50,13 @@ def run_model_test(init_device_type, shard_strategy_class):
             assert param.col_attr.sharded_data_tensor.is_sharded
             assert param.col_attr.sharded_data_tensor.payload.device.type == init_device.type, \
                 f'{param.col_attr.sharded_data_tensor.payload.device.type} vs. {init_device.type}'
-        if init_device.type == 'cuda':
-            assert (GLOBAL_MODEL_DATA_TRACER.cuda_usage > 0)
-        else:
-            assert (GLOBAL_MODEL_DATA_TRACER.cpu_usage > 0)
-        GLOBAL_MODEL_DATA_TRACER.clear()
+
+        cuda_mem_use, cpu_mem_use = col_model_data_mem_usage(model)
+        model_data_cuda_mem_MB = cuda_mem_use / 1e6
+        logger.info(f"Existing ZeRO Context.\nModel Data CUDA Memory {model_data_cuda_mem_MB} MB", ranks=[0])
+        sys_cuda_mem_MB = colo_cuda_memory_used() / 1e6
+        logger.info(f"System CUDA Memory Usage {sys_cuda_mem_MB} MB", ranks=[0])
+        logger.info(f"Model Number Parameter {model_numel_tensor.numpy()[0]/1e6} M", ranks=[0])
 
 
 def run_dist(rank, world_size, port):