[legacy] move communication and nn to legacy and refactor logger (#4671)

* [legacy] move communication to legacy (#4640)

* [legacy] refactor logger and clean up legacy codes (#4654)

* [legacy] make logger independent to gpc

* [legacy] make optim independent to registry

* [legacy] move test engine to legacy

* [legacy] move nn to legacy (#4656)

* [legacy] move nn to legacy

* [checkpointio] fix save hf config

* [test] remove useledd rpc pp test

* [legacy] fix nn init

* [example] skip tutorial hybriad parallel example

* [devops] test doc check

* [devops] test doc check

examples/tutorial/hybrid_parallel/test_ci.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 set -euxo pipefail
 
-pip install -r requirements.txt
-colossalai run --nproc_per_node 4 train.py --config config.py
+echo "legacy example"
+
+# pip install -r requirements.txt
+# colossalai run --nproc_per_node 4 train.py --config config.py

examples/tutorial/hybrid_parallel/train.py

@@ -7,8 +7,8 @@ from tqdm import tqdm
 import colossalai
 from colossalai.context import ParallelMode
 from colossalai.core import global_context as gpc
+from colossalai.legacy.nn import CrossEntropyLoss
 from colossalai.logging import get_dist_logger
-from colossalai.nn import CrossEntropyLoss
 from colossalai.nn.lr_scheduler import CosineAnnealingWarmupLR
 from colossalai.pipeline.pipelinable import PipelinableContext
 from colossalai.utils import is_using_pp