Support p2p overlap

[Eddie-Wang1120]

PR Category

Distributed Strategy

PR Types

New features

Description

Support p2p overlap

是否引起精度变化

否

[paddle-bot]

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 11.53846% with 46 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@d6e489c). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...stributed/fleet/meta_parallel/pipeline_parallel.py	2.22%	44 Missing ⚠️
.../fleet/meta_parallel/pp_utils/p2p_communication.py	71.42%	2 Missing ⚠️

❌ Your patch status has failed because the patch coverage (11.53%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop   #78768   +/-   ##
==========================================
  Coverage           ?   11.53%           
==========================================
  Files              ?        2           
  Lines              ?       52           
  Branches           ?        0           
==========================================
  Hits               ?        6           
  Misses             ?       46           
  Partials           ?        0           

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[ForFishes]

LGTM

[sneaxiy]

LGTM for coverage due to lack of enough GPU.