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// SPDX-License-Identifier: CDDL-1.0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
static void
cleanup(char *file)
{
(void) remove(file);
}
int
main(int argc, char *argv[])
{
char *testdir = getenv("TESTDIR");
if (!testdir) {
fprintf(stderr, "environment variable TESTDIR not set\n");
return (1);
}
struct stat st;
umask(0);
if (stat(testdir, &st) != 0 &&
mkdir(testdir, 0777) != 0) {
perror("mkdir");
return (1);
}
if (argc > 3) {
fprintf(stderr, "usage: %s "
"[run time in mins] "
"[max msync time in ms]\n", argv[0]);
return (1);
}
int run_time_mins = 1;
if (argc >= 2) {
run_time_mins = atoi(argv[1]);
}
int max_msync_time_ms = 2000;
if (argc >= 3) {
max_msync_time_ms = atoi(argv[2]);
}
char filepath[512];
filepath[0] = '\0';
char *file = &filepath[0];
(void) snprintf(file, 512, "%s/msync_file", testdir);
const int LEN = 8;
cleanup(file);
int fd = open(file, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR |
S_IRGRP | S_IROTH);
if (fd == -1) {
(void) fprintf(stderr, "%s: %s: ", argv[0], file);
perror("open");
return (1);
}
if (ftruncate(fd, LEN) != 0) {
perror("ftruncate");
cleanup(file);
return (1);
}
void *ptr = mmap(NULL, LEN, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (ptr == MAP_FAILED) {
perror("mmap");
cleanup(file);
return (1);
}
struct timeval tstart;
gettimeofday(&tstart, NULL);
long long x = 0LL;
for (;;) {
*((long long *)ptr) = x;
x++;
struct timeval t1, t2;
gettimeofday(&t1, NULL);
if (msync(ptr, LEN, MS_SYNC|MS_INVALIDATE) != 0) {
perror("msync");
cleanup(file);
return (1);
}
gettimeofday(&t2, NULL);
double elapsed = (t2.tv_sec - t1.tv_sec) * 1000.0;
elapsed += ((t2.tv_usec - t1.tv_usec) / 1000.0);
if (elapsed > max_msync_time_ms) {
fprintf(stderr, "slow msync: %f ms\n", elapsed);
if (munmap(ptr, LEN) != 0)
perror("munmap");
cleanup(file);
return (1);
}
double elapsed_start = (t2.tv_sec - tstart.tv_sec) * 1000.0;
elapsed_start += ((t2.tv_usec - tstart.tv_usec) / 1000.0);
if (elapsed_start > run_time_mins * 60 * 1000) {
break;
}
}
if (munmap(ptr, LEN) != 0) {
perror("munmap");
cleanup(file);
return (1);
}
if (close(fd) != 0) {
perror("close");
}
cleanup(file);
return (0);
}
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