/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* * Program to test different ways to get the time; right now it is tuned * only for solaris. * solaris results (100000 iterations): * time to get time with time(): 4.63 usec avg, 463 msec total * time to get time with gethrtime(): 2.17 usec avg, 217 msec total * time to get time with gettimeofday(): 1.25 usec avg, 125 msec total * * */ /*********************************************************************** ** Includes ***********************************************************************/ /* Used to get the command line option */ #include "plgetopt.h" #include "nspr.h" #include "prpriv.h" #include "prinrval.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/time.h> #define DEFAULT_COUNT 100000 PRInt32 count; time_t itime; hrtime_t ihrtime; void ftime_init() { itime = time(NULL); ihrtime = gethrtime(); } time_t ftime() { hrtime_t now = gethrtime(); return itime + ((now - ihrtime) / 1000000000ll); } static void timeTime(void) { PRInt32 index = count; time_t rv; for (;index--;) rv = time(NULL); } static void timeGethrtime(void) { PRInt32 index = count; time_t rv; for (;index--;) rv = ftime(); } static void timeGettimeofday(void) { PRInt32 index = count; time_t rv; struct timeval tp; for (;index--;) rv = gettimeofday(&tp, NULL); } static void timePRTime32(void) { PRInt32 index = count; PRInt32 rv32; PRTime q; PRTime rv; LL_I2L(q, 1000000); for (;index--;) { rv = PR_Now(); LL_DIV(rv, rv, q); LL_L2I(rv32, rv); } } static void timePRTime64(void) { PRInt32 index = count; PRTime rv; for (;index--;) rv = PR_Now(); } /************************************************************************/ static void Measure(void (*func)(void), const char *msg) { PRIntervalTime start, stop; double d; PRInt32 tot; start = PR_IntervalNow(); (*func)(); stop = PR_IntervalNow(); d = (double)PR_IntervalToMicroseconds(stop - start); tot = PR_IntervalToMilliseconds(stop-start); if (debug_mode) printf("%40s: %6.2f usec avg, %d msec total\n", msg, d / count, tot); } int main(int argc, char **argv) { /* The command line argument: -d is used to determine if the test is being run in debug mode. The regress tool requires only one line output:PASS or FAIL. All of the printfs associated with this test has been handled with a if (debug_mode) test. Usage: test_name -d */ PLOptStatus os; PLOptState *opt = PL_CreateOptState(argc, argv, "d:"); while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) { if (PL_OPT_BAD == os) continue; switch (opt->option) { case 'd': /* debug mode */ debug_mode = 1; break; default: break; } } PL_DestroyOptState(opt); PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0); PR_STDIO_INIT(); if (argc > 1) { count = atoi(argv[1]); } else { count = DEFAULT_COUNT; } ftime_init(); Measure(timeTime, "time to get time with time()"); Measure(timeGethrtime, "time to get time with gethrtime()"); Measure(timeGettimeofday, "time to get time with gettimeofday()"); Measure(timePRTime32, "time to get time with PR_Time() (32bit)"); Measure(timePRTime64, "time to get time with PR_Time() (64bit)"); PR_Cleanup(); return 0; }