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Enable yield cycle on Linux

Description

Enable yield cycle on Linux

This change allows the runtime to turn __kmp_yield() on/off repeatedly on Linux.
This feature was removed when disabling monitor thread, but there are
applications that perform better with this feature on.

Patch by Hansang Bae

Differential Revision: https://reviews.llvm.org/D29227

Details

Committed
jlpeytonFeb 15 2017, 9:19 AM
Differential Revision
D29227: Enable yield cycle on Linux
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