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| author | Richard Henderson <rth@twiddle.net> | 2014-06-25 12:27:16 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2014-07-03 08:38:25 -0700 |
| commit | 428dd03f5a7291d19f0c45fc314da9356ee22d63 (patch) | |
| tree | 35017b916f4ebeebf563364be5c07cdee6902a4e /sysdeps/i386/i686/hp-timing.h | |
| parent | c39323e9d2fb6697d5d8739ad9b7959c88a6d5a1 (diff) | |
| download | glibc-428dd03f5a7291d19f0c45fc314da9356ee22d63.tar.gz glibc-428dd03f5a7291d19f0c45fc314da9356ee22d63.tar.xz glibc-428dd03f5a7291d19f0c45fc314da9356ee22d63.zip | |
Remove HP_TIMING_DIFF_INIT and dl_hp_timing_overhead
Without HP_TIMING_ACCUM, dl_hp_timing_overhead is write-only. If we remove it, there's no point in HP_TIMING_DIFF_INIT either.
Diffstat (limited to 'sysdeps/i386/i686/hp-timing.h')
| -rw-r--r-- | sysdeps/i386/i686/hp-timing.h | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/sysdeps/i386/i686/hp-timing.h b/sysdeps/i386/i686/hp-timing.h index a4b19c1043..12c613e9de 100644 --- a/sysdeps/i386/i686/hp-timing.h +++ b/sysdeps/i386/i686/hp-timing.h @@ -52,9 +52,6 @@ - HP_TIMING_NOW: place timestamp for current time in variable given as parameter. - - HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the - HP_TIMING_DIFF macro. - - HP_TIMING_DIFF: compute difference between two times and store it in a third. Source and destination might overlap. @@ -83,25 +80,6 @@ typedef unsigned long long int hp_timing_t; in accurate clock cycles here so we don't do this. */ #define HP_TIMING_NOW(Var) __asm__ __volatile__ ("rdtsc" : "=A" (Var)) -/* Use two 'rdtsc' instructions in a row to find out how long it takes. */ -#define HP_TIMING_DIFF_INIT() \ - do { \ - if (GLRO(dl_hp_timing_overhead) == 0) \ - { \ - int __cnt = 5; \ - GLRO(dl_hp_timing_overhead) = ~0ull; \ - do \ - { \ - hp_timing_t __t1, __t2; \ - HP_TIMING_NOW (__t1); \ - HP_TIMING_NOW (__t2); \ - if (__t2 - __t1 < GLRO(dl_hp_timing_overhead)) \ - GLRO(dl_hp_timing_overhead) = __t2 - __t1; \ - } \ - while (--__cnt > 0); \ - } \ - } while (0) - /* It's simple arithmetic for us. */ #define HP_TIMING_DIFF(Diff, Start, End) (Diff) = ((End) - (Start)) |