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Replace sched_yield with usleep(1) on Linux 

to avoid the massive overhead of the sched_yield call on Linux kernels since its semantics were changed in early 2003 (late 2.5 series) to include reordering of the thread queue. Ref. #900,#923
This commit is contained in:
Martin Kroeker 2017-01-08 23:05:55 +01:00 committed by GitHub
parent c61a7cd293
commit f1db56fcd7
1 changed files with 4 additions and 0 deletions
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4
common.h
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@ -314,6 +314,10 @@ typedef int blasint;
#define YIELDING thr_yield() #define YIELDING thr_yield()
#endif #endif
#if defined(OS_LINUX)
#define YIELDING usleep(1)
#endif
#if defined(OS_WINDOWS) #if defined(OS_WINDOWS)
#if defined(_MSC_VER) && !defined(__clang__) #if defined(_MSC_VER) && !defined(__clang__)
#define YIELDING YieldProcessor() #define YIELDING YieldProcessor()