diff options
Diffstat (limited to 'progs/perf/common.c')
-rw-r--r-- | progs/perf/common.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/progs/perf/common.c b/progs/perf/common.c deleted file mode 100644 index b6489ef918..0000000000 --- a/progs/perf/common.c +++ /dev/null @@ -1,137 +0,0 @@ -/* - * Copyright (C) 2009 VMware, Inc. All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -/** - * Common perf code. This should be re-usable with other APIs. - */ - -#include "common.h" -#include "glmain.h" - -#include <stdio.h> -#include <stdlib.h> -#include <stdarg.h> - -#if defined(_MSC_VER) -#define snprintf _snprintf -#endif - - -/* Need to add a fflush windows console with mingw, otherwise nothing - * shows up until program exit. May want to add logging here. - */ -void -perf_printf(const char *format, ...) -{ - va_list ap; - va_start(ap, format); - - fflush(stdout); - vfprintf(stdout, format, ap); - fflush(stdout); - - va_end(ap); -} - - - -/** - * Run function 'f' for enough iterations to reach a steady state. - * Return the rate (iterations/second). - */ -double -PerfMeasureRate(PerfRateFunc f) -{ - const double minDuration = 1.0; - double rate = 0.0, prevRate = 0.0; - unsigned subiters; - - /* Compute initial number of iterations to try. - * If the test function is pretty slow this helps to avoid - * extraordarily long run times. - */ - subiters = 2; - { - const double t0 = PerfGetTime(); - double t1; - do { - f(subiters); /* call the rendering function */ - t1 = PerfGetTime(); - subiters *= 2; - } while (t1 - t0 < 0.1 * minDuration); - } - /*perf_printf("initial subIters = %u\n", subiters);*/ - - while (1) { - const double t0 = PerfGetTime(); - unsigned iters = 0; - double t1; - - do { - f(subiters); /* call the rendering function */ - t1 = PerfGetTime(); - iters += subiters; - } while (t1 - t0 < minDuration); - - rate = iters / (t1 - t0); - - if (0) - perf_printf("prevRate %f rate %f ratio %f iters %u\n", - prevRate, rate, rate/prevRate, iters); - - /* Try and speed the search up by skipping a few steps: - */ - if (rate > prevRate * 1.6) - subiters *= 8; - else if (rate > prevRate * 1.2) - subiters *= 4; - else if (rate > prevRate * 1.05) - subiters *= 2; - else - break; - - prevRate = rate; - } - - if (0) - perf_printf("%s returning iters %u rate %f\n", __FUNCTION__, subiters, rate); - return rate; -} - - -/* Note static buffer, can only use once per printf. - */ -const char * -PerfHumanFloat( double d ) -{ - static char buf[80]; - - if (d > 1000000000.0) - snprintf(buf, sizeof(buf), "%.1f billion", d / 1000000000.0); - else if (d > 1000000.0) - snprintf(buf, sizeof(buf), "%.1f million", d / 1000000.0); - else if (d > 1000.0) - snprintf(buf, sizeof(buf), "%.1f thousand", d / 1000.0); - else - snprintf(buf, sizeof(buf), "%.1f", d); - - return buf; -} |