Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
91 lines
1.6 KiB
C
91 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright 2016, Anton Blanchard, Michael Ellerman, IBM Corp.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/mman.h>
|
|
#include <time.h>
|
|
#include <getopt.h>
|
|
|
|
#include "utils.h"
|
|
|
|
#define ITERATIONS 5000000
|
|
|
|
#define MEMSIZE (1UL << 27)
|
|
#define PAGE_SIZE (1UL << 16)
|
|
#define CHUNK_COUNT (MEMSIZE/PAGE_SIZE)
|
|
|
|
static int pg_fault;
|
|
static int iterations = ITERATIONS;
|
|
|
|
static struct option options[] = {
|
|
{ "pgfault", no_argument, &pg_fault, 1 },
|
|
{ "iterations", required_argument, 0, 'i' },
|
|
{ 0, },
|
|
};
|
|
|
|
static void usage(void)
|
|
{
|
|
printf("mmap_bench <--pgfault> <--iterations count>\n");
|
|
}
|
|
|
|
int test_mmap(void)
|
|
{
|
|
struct timespec ts_start, ts_end;
|
|
unsigned long i = iterations;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &ts_start);
|
|
|
|
while (i--) {
|
|
char *c = mmap(NULL, MEMSIZE, PROT_READ|PROT_WRITE,
|
|
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
|
|
FAIL_IF(c == MAP_FAILED);
|
|
if (pg_fault) {
|
|
int count;
|
|
for (count = 0; count < CHUNK_COUNT; count++)
|
|
c[count << 16] = 'c';
|
|
}
|
|
munmap(c, MEMSIZE);
|
|
}
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &ts_end);
|
|
|
|
printf("time = %.6f\n", ts_end.tv_sec - ts_start.tv_sec + (ts_end.tv_nsec - ts_start.tv_nsec) / 1e9);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
signed char c;
|
|
while (1) {
|
|
int option_index = 0;
|
|
|
|
c = getopt_long(argc, argv, "", options, &option_index);
|
|
|
|
if (c == -1)
|
|
break;
|
|
|
|
switch (c) {
|
|
case 0:
|
|
if (options[option_index].flag != 0)
|
|
break;
|
|
|
|
usage();
|
|
exit(1);
|
|
break;
|
|
case 'i':
|
|
iterations = atoi(optarg);
|
|
break;
|
|
default:
|
|
usage();
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
test_harness_set_timeout(300);
|
|
return test_harness(test_mmap, "mmap_bench");
|
|
}
|