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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-06-05 09:48:04 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-06-05 09:48:07 -0700 |
| commit | e52434a2e4d1105272daaef87678da950fbec73f (patch) | |
| tree | 32d8bfaeedb32a24a51a5ee588f0417542b69f29 /benchtests/Makefile | |
| parent | f6070476687af9ca1b5837f8a45047acdd419b08 (diff) | |
| download | glibc-e52434a2e4d1105272daaef87678da950fbec73f.tar.gz glibc-e52434a2e4d1105272daaef87678da950fbec73f.tar.xz glibc-e52434a2e4d1105272daaef87678da950fbec73f.zip | |
benchtests: Restore the clock_gettime option
commit 7621e38bf3c58b2d0359545f1f2898017fd89d05
Author: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
Date: Tue Jan 29 17:43:45 2019 +0000
Add generic hp-timing support
removed the clock_gettime option. Restore the clock_gettime option for
some x86 CPUs on which value from RDTSC may not be incremented at a fixed
rate.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'benchtests/Makefile')
| -rw-r--r-- | benchtests/Makefile | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/benchtests/Makefile b/benchtests/Makefile index 335d643ecb..99e90d17a0 100644 --- a/benchtests/Makefile +++ b/benchtests/Makefile @@ -132,11 +132,17 @@ endif CPPFLAGS-nonlib += -DDURATION=$(BENCH_DURATION) -D_ISOMAC +# Use clock_gettime to measure performance of functions. The default is +# to use the architecture-specific high precision timing instructions. +ifdef USE_CLOCK_GETTIME +CPPFLAGS-nonlib += -DUSE_CLOCK_GETTIME +else # On x86 processors, use RDTSCP, instead of RDTSC, to measure performance # of functions. All x86 processors since 2010 support RDTSCP instruction. ifdef USE_RDTSCP CPPFLAGS-nonlib += -DUSE_RDTSCP endif +endif DETAILED_OPT := |