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/* -*- 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;
}
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