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| author | Wilco Dijkstra <Wilco.Dijkstra@arm.com> | 2019-01-29 17:43:45 +0000 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-03-22 17:30:44 -0300 |
| commit | 7621e38bf3c58b2d0359545f1f2898017fd89d05 (patch) | |
| tree | fbf712328d2d62a509d7a048e2fb22a5bf0f4b55 /sysdeps/generic/hp-timing.h | |
| parent | 1e372ded4f83362509c8672ff501cba871bb1edc (diff) | |
| download | glibc-7621e38bf3c58b2d0359545f1f2898017fd89d05.tar.gz glibc-7621e38bf3c58b2d0359545f1f2898017fd89d05.tar.xz glibc-7621e38bf3c58b2d0359545f1f2898017fd89d05.zip | |
Add generic hp-timing support
Add missing generic hp_timing support. It uses clock_gettime (CLOCK_MONOTONIC) which has unspecified starting time, nano-second accuracy, and should faster on architectures that implementes the symbol as vDSO. Checked on aarch64-linux-gnu, x86_64-linux-gnu, and i686-linux-gnu. I also checked the builds for all afected ABIs. * benchtests/Makefile (USE_CLOCK_GETTIME) Remove. * benchtests/README: Update description. * benchtests/bench-timing.h: Default to hp-timing. * sysdeps/generic/hp-timing.h (HP_TIMING_DIFF, HP_TIMING_ACCUM_NT, HP_TIMING_PRINT): Remove. (HP_TIMING_NOW): Add generic implementation. (hp_timing_t): Change to uint64_t.
Diffstat (limited to 'sysdeps/generic/hp-timing.h')
| -rw-r--r-- | sysdeps/generic/hp-timing.h | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/sysdeps/generic/hp-timing.h b/sysdeps/generic/hp-timing.h index 278998d2c2..2528279558 100644 --- a/sysdeps/generic/hp-timing.h +++ b/sysdeps/generic/hp-timing.h @@ -20,16 +20,23 @@ #ifndef _HP_TIMING_H #define _HP_TIMING_H 1 -/* There are no generic definitions for the times. We could write something - using the `gettimeofday' system call where available but the overhead of - the system call might be too high. */ +#include <time.h> +#include <stdint.h> +#include <hp-timing-common.h> -/* Provide dummy definitions. */ +/* It should not be used for ld.so. */ #define HP_TIMING_INLINE (0) -typedef int hp_timing_t; -#define HP_TIMING_NOW(var) -#define HP_TIMING_DIFF(Diff, Start, End) -#define HP_TIMING_ACCUM_NT(Sum, Diff) -#define HP_TIMING_PRINT(Buf, Len, Val) + +typedef uint64_t hp_timing_t; + +/* The clock_gettime (CLOCK_MONOTONIC) has unspecified starting time, + nano-second accuracy, and for some architectues is implemented as + vDSO symbol. */ +#define HP_TIMING_NOW(var) \ +({ \ + struct timespec tv; \ + __clock_gettime (CLOCK_MONOTONIC, &tv); \ + (var) = (tv.tv_nsec + UINT64_C(1000000000) * tv.tv_sec); \ +}) #endif /* hp-timing.h */ |