1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/nsprpub/pr/tests/time.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,169 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 + * Program to test different ways to get the time; right now it is tuned
1.11 + * only for solaris.
1.12 + * solaris results (100000 iterations):
1.13 + * time to get time with time(): 4.63 usec avg, 463 msec total
1.14 + * time to get time with gethrtime(): 2.17 usec avg, 217 msec total
1.15 + * time to get time with gettimeofday(): 1.25 usec avg, 125 msec total
1.16 + *
1.17 + *
1.18 + */
1.19 +/***********************************************************************
1.20 +** Includes
1.21 +***********************************************************************/
1.22 +/* Used to get the command line option */
1.23 +#include "plgetopt.h"
1.24 +
1.25 +#include "nspr.h"
1.26 +#include "prpriv.h"
1.27 +#include "prinrval.h"
1.28 +
1.29 +#include <stdio.h>
1.30 +#include <stdlib.h>
1.31 +#include <string.h>
1.32 +#include <sys/time.h>
1.33 +
1.34 +#define DEFAULT_COUNT 100000
1.35 +PRInt32 count;
1.36 +
1.37 +time_t itime;
1.38 +hrtime_t ihrtime;
1.39 +
1.40 +void
1.41 +ftime_init()
1.42 +{
1.43 + itime = time(NULL);
1.44 + ihrtime = gethrtime();
1.45 +}
1.46 +
1.47 +time_t
1.48 +ftime()
1.49 +{
1.50 + hrtime_t now = gethrtime();
1.51 +
1.52 + return itime + ((now - ihrtime) / 1000000000ll);
1.53 +}
1.54 +
1.55 +static void timeTime(void)
1.56 +{
1.57 + PRInt32 index = count;
1.58 + time_t rv;
1.59 +
1.60 + for (;index--;)
1.61 + rv = time(NULL);
1.62 +}
1.63 +
1.64 +static void timeGethrtime(void)
1.65 +{
1.66 + PRInt32 index = count;
1.67 + time_t rv;
1.68 +
1.69 + for (;index--;)
1.70 + rv = ftime();
1.71 +}
1.72 +
1.73 +static void timeGettimeofday(void)
1.74 +{
1.75 + PRInt32 index = count;
1.76 + time_t rv;
1.77 + struct timeval tp;
1.78 +
1.79 + for (;index--;)
1.80 + rv = gettimeofday(&tp, NULL);
1.81 +}
1.82 +
1.83 +static void timePRTime32(void)
1.84 +{
1.85 + PRInt32 index = count;
1.86 + PRInt32 rv32;
1.87 + PRTime q;
1.88 + PRTime rv;
1.89 +
1.90 + LL_I2L(q, 1000000);
1.91 +
1.92 + for (;index--;) {
1.93 + rv = PR_Now();
1.94 + LL_DIV(rv, rv, q);
1.95 + LL_L2I(rv32, rv);
1.96 + }
1.97 +}
1.98 +
1.99 +static void timePRTime64(void)
1.100 +{
1.101 + PRInt32 index = count;
1.102 + PRTime rv;
1.103 +
1.104 + for (;index--;)
1.105 + rv = PR_Now();
1.106 +}
1.107 +
1.108 +/************************************************************************/
1.109 +
1.110 +static void Measure(void (*func)(void), const char *msg)
1.111 +{
1.112 + PRIntervalTime start, stop;
1.113 + double d;
1.114 + PRInt32 tot;
1.115 +
1.116 + start = PR_IntervalNow();
1.117 + (*func)();
1.118 + stop = PR_IntervalNow();
1.119 +
1.120 + d = (double)PR_IntervalToMicroseconds(stop - start);
1.121 + tot = PR_IntervalToMilliseconds(stop-start);
1.122 +
1.123 + if (debug_mode) printf("%40s: %6.2f usec avg, %d msec total\n", msg, d / count, tot);
1.124 +}
1.125 +
1.126 +int main(int argc, char **argv)
1.127 +{
1.128 + /* The command line argument: -d is used to determine if the test is being run
1.129 + in debug mode. The regress tool requires only one line output:PASS or FAIL.
1.130 + All of the printfs associated with this test has been handled with a if (debug_mode)
1.131 + test.
1.132 + Usage: test_name -d
1.133 + */
1.134 + PLOptStatus os;
1.135 + PLOptState *opt = PL_CreateOptState(argc, argv, "d:");
1.136 + while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
1.137 + {
1.138 + if (PL_OPT_BAD == os) continue;
1.139 + switch (opt->option)
1.140 + {
1.141 + case 'd': /* debug mode */
1.142 + debug_mode = 1;
1.143 + break;
1.144 + default:
1.145 + break;
1.146 + }
1.147 + }
1.148 + PL_DestroyOptState(opt);
1.149 +
1.150 + PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
1.151 + PR_STDIO_INIT();
1.152 +
1.153 + if (argc > 1) {
1.154 + count = atoi(argv[1]);
1.155 + } else {
1.156 + count = DEFAULT_COUNT;
1.157 + }
1.158 +
1.159 + ftime_init();
1.160 +
1.161 + Measure(timeTime, "time to get time with time()");
1.162 + Measure(timeGethrtime, "time to get time with gethrtime()");
1.163 + Measure(timeGettimeofday, "time to get time with gettimeofday()");
1.164 + Measure(timePRTime32, "time to get time with PR_Time() (32bit)");
1.165 + Measure(timePRTime64, "time to get time with PR_Time() (64bit)");
1.166 +
1.167 + PR_Cleanup();
1.168 + return 0;
1.169 +}
1.170 +
1.171 +
1.172 +
