set MKL_NUM_THREADS

[zhengshengning]

PR Category

Operator Mechanism

PR Types

Bug fixes

Description

结合用户issue #75760

修改MKL_NUM_THREADS的默认值，是的OneDNN默认可以并行运算。提升CPU Kernel效率。

pcard-93348

[paddle-bot]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

@@             Coverage Diff             @@
##             develop    #75880   +/-   ##
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  Coverage           ?   100.00%           
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  Files              ?         1           
  Lines              ?         2           
  Branches           ?         0           
===========================================
  Hits               ?         2           
  Misses             ?         0           
  Partials           ?         0           

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