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/*
* writetest --
*
*/
#include <sys/types.h>
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
void usage(void);
int
main(argc, argv)
int argc;
char *argv[];
{
struct timeval start_time, end_time;
double usecs;
long val;
int bytes, ch, cnt, fd, ops;
char *fname, buf[100 * 1024];
bytes = 256;
fname = "testfile";
ops = 1000;
while ((ch = getopt(argc, argv, "b:f:o:")) != EOF)
switch (ch) {
case 'b':
if ((bytes = atoi(optarg)) > sizeof(buf)) {
fprintf(stderr,
"max -b option %d\n", sizeof(buf));
exit (1);
}
break;
case 'f':
fname = optarg;
break;
case 'o':
if ((ops = atoi(optarg)) <= 0) {
fprintf(stderr, "illegal -o option value\n");
exit (1);
}
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
(void)unlink(fname);
if ((fd = open(fname, O_RDWR | O_CREAT, 0666)) == -1) {
perror(fname);
exit (1);
}
memset(buf, 0, bytes);
printf("Running: %d ops\n", ops);
(void)gettimeofday(&start_time, NULL);
for (cnt = 0; cnt < ops; ++cnt) {
if (write(fd, buf, bytes) != bytes) {
fprintf(stderr, "write: %s\n", strerror(errno));
exit (1);
}
if (lseek(fd, (off_t)0, SEEK_SET) == -1) {
fprintf(stderr, "lseek: %s\n", strerror(errno));
exit (1);
}
if (fsync(fd) != 0) {
fprintf(stderr, "fsync: %s\n", strerror(errno));
exit (1);
}
}
(void)gettimeofday(&end_time, NULL);
/*
* Guarantee end_time fields are greater than or equal to start_time
* fields.
*/
if (end_time.tv_sec > start_time.tv_sec) {
--end_time.tv_sec;
end_time.tv_usec += 1000000;
}
/* Display elapsed time. */
val = end_time.tv_sec - start_time.tv_sec;
printf("Elapsed time: %ld:", val / (60 * 60));
val %= 60 * 60;
printf("%ld:", val / 60);
val %= 60;
printf("%ld.%ld\n", val, end_time.tv_usec - start_time.tv_usec);
/* Display operations per second. */
usecs =
(end_time.tv_sec - start_time.tv_sec) * 1000000 +
(end_time.tv_usec - start_time.tv_usec);
printf("%d operations: %7.2f operations per second\n",
ops, (ops / usecs) * 1000000);
(void)unlink(fname);
exit (0);
}
void
usage()
{
(void)fprintf(stderr,
"usage: testfile [-b bytes] [-f file] [-o ops]\n");
exit(1);
}
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