mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 22:25:30 +00:00
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 -*- */
|
|
/* 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;
|
|
}
|
|
|
|
|
|
|