[legacy] clean up legacy code (#4743)

* [legacy] remove outdated codes of pipeline (#4692)

* [legacy] remove cli of benchmark and update optim (#4690)

* [legacy] remove cli of benchmark and update optim

* [doc] fix cli doc test

* [legacy] fix engine clip grad norm

* [legacy] remove outdated colo tensor (#4694)

* [legacy] remove outdated colo tensor

* [test] fix test import

* [legacy] move outdated zero to legacy (#4696)

* [legacy] clean up utils (#4700)

* [legacy] clean up utils

* [example] update examples

* [legacy] clean up amp

* [legacy] fix amp module

* [legacy] clean up gpc (#4742)

* [legacy] clean up context

* [legacy] clean core, constants and global vars

* [legacy] refactor initialize

* [example] fix examples ci

* [example] fix examples ci

* [legacy] fix tests

* [example] fix gpt example

* [example] fix examples ci

* [devops] fix ci installation

* [example] fix examples ci

examples/community/roberta/pretraining/pretrain_utils.py

@@ -16,7 +16,7 @@ from transformers import (
     get_linear_schedule_with_warmup,
 )
 
-from colossalai.core import global_context as gpc
+from colossalai.legacy.core import global_context as gpc
 from colossalai.nn.lr_scheduler import LinearWarmupLR
 from colossalai.nn.optimizer import FusedAdam, HybridAdam
 

examples/community/roberta/pretraining/run_pretraining.py

@@ -17,7 +17,7 @@ from utils.logger import Logger
 
 import colossalai
 from colossalai.context import ParallelMode
-from colossalai.core import global_context as gpc
+from colossalai.legacy.core import global_context as gpc
 from colossalai.nn.parallel import GeminiDDP, zero_model_wrapper, zero_optim_wrapper
 from colossalai.tensor import ColoParameter, ComputePattern, ComputeSpec, ProcessGroup, ReplicaSpec, ShardSpec
 from colossalai.utils import get_current_device

examples/community/roberta/pretraining/utils/exp_util.py

@@ -5,7 +5,7 @@ import shutil
 import psutil
 import torch
 
-from colossalai.core import global_context as gpc
+from colossalai.legacy.core import global_context as gpc
 
 
 def logging(s, log_path, print_=True, log_=True):