From 5f446ac4c9d98c7819ff836c0666c798f351ae2c Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Mon, 21 Sep 2009 03:48:23 +0000 Subject: Make baseline calculations more accurate for SANDGLASS_REALTICKS. Perform the baseline calculation directly in the sandglass_bench() macro, so that the baseline is calculated in the same place (and therefore optimization level, etc.) as the benchmarked code. --- src/sandglass.c | 17 ----------------- 1 file changed, 17 deletions(-) (limited to 'src/sandglass.c') diff --git a/src/sandglass.c b/src/sandglass.c index b9316e5..6db28a3 100644 --- a/src/sandglass.c +++ b/src/sandglass.c @@ -189,16 +189,6 @@ sandglass_elapse(sandglass_t *sandglass) /* Magical correction for timespec-based grains */ sandglass->grains += sandglass->adjustment; - if (sandglass->attributes.resolution == SANDGLASS_REALTICKS) { - baseline.attributes.incrementation = SANDGLASS_MONOTONIC; - baseline.attributes.resolution = SANDGLASS_CPUTIME; - baseline.loops = sandglass->loops; - - sandglass_bench(&baseline, { }); - sandglass->grains -= baseline.grains; - sandglass->grains /= sandglass->loops; - } - return 0; } @@ -213,13 +203,6 @@ sandglass_real_gettime(sandglass_t *sandglass) case SANDGLASS_MONOTONIC: switch (sandglass->attributes.resolution) { case SANDGLASS_REALTICKS: -#ifdef SANDGLASS_TSC - sandglass->grains = sandglass_get_tsc(); - break; -#else - return -1; -#endif - case SANDGLASS_CPUTIME: #ifdef SANDGLASS_TSC sandglass->grains = sandglass_get_tsc(); -- cgit v1.2.3