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