*/
/*
* This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
*/
#include <stdio.h>
{ .name = "stat", .has_arg = no_argument, .val = 's' },
{ .name = NULL }
};
+
char *shortopts = "hlr:s0123456789";
static int usage(char *prog, FILE *out)
{
- fprintf(out,
- "Usage: %s [-r rand_seed] {-s|-l} filenamebase total_files iterations\n"
- "-r : random seed\n"
- "-s : regular stat() calls\n"
- "-l : lookup ioctl only\n", prog);
- exit(out == stderr);
+ fprintf(out,
+ "random stat of files within a directory\n"
+ "usage: %s [-r rand_seed] {-s|-l} filenamebase total_files [iterations]\n"
+ "-r : random seed for repeatable sequence\n"
+ "-s : regular stat() calls\n"
+ "-l : llapi_file_lookup() ioctl only\n"
+ "iterations: default = total_files, or negative for seconds\n",
+ prog);
+ exit(out == stderr);
}
#ifndef LONG_MAX
#define LONG_MAX (1 << ((8 * sizeof(long)) - 1))
#endif
-int main(int argc, char ** argv)
+int main(int argc, char **argv)
{
- long i, count, iter = LONG_MAX, mode = 0, offset;
- long int start, length = LONG_MAX, last;
- char parent[4096], *t;
- char *prog = argv[0], *base;
+ long i, count, iter = 1, mode = 0, offset;
+ long int start, duration = LONG_MAX, last, now;
+ char parent[4096], *t;
+ char *prog, *base;
int seed = 0, rc;
int fd = -1;
- while ((rc = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
+ prog = strrchr(argv[0], '/');
+ if (prog)
+ prog++;
+ else
+ prog = argv[0];
+
+ while ((rc = getopt_long(argc, argv, shortopts, longopts,
+ NULL)) != -1) {
char *e;
+
switch (rc) {
case 'r':
seed = strtoul(optarg, &e, 0);
case 's':
mode = rc;
break;
+ /* a negative "count" argument (test duration in seconds,
+ * e.g. "-300") is treated as a command-line argument.
+ * Parse all of the digits here back into "duration".
+ */
case '0':
case '1':
case '2':
case '7':
case '8':
case '9':
- if (length == LONG_MAX)
- length = rc - '0';
+ if (duration == LONG_MAX)
+ duration = rc - '0';
else
- length = length * 10 + (rc - '0');
+ duration = duration * 10 + (rc - '0');
break;
case 'h':
usage(prog, stdout);
}
}
- if (optind + 2 + (length == LONG_MAX) != argc) {
- fprintf(stderr, "missing filenamebase, total_files, or iterations\n");
+ if (argc < optind + 2 || argc > optind + 3) {
+ fprintf(stderr,
+ "missing filenamebase, total_files, or iterations\n");
usage(prog, stderr);
}
- base = argv[optind];
- if (strlen(base) > 4080) {
- fprintf(stderr, "filenamebase too long\n");
- exit(1);
- }
+ base = argv[optind];
+ if (strlen(base) > 4080) {
+ fprintf(stderr, "filenamebase too long\n");
+ exit(1);
+ }
if (seed == 0) {
int f = open("/dev/urandom", O_RDONLY);
printf("using seed %u\n", seed);
srand(seed);
- count = strtoul(argv[optind + 1], NULL, 0);
- if (length == LONG_MAX) {
- iter = strtoul(argv[optind + 2], NULL, 0);
+ count = strtoul(argv[optind + 1], NULL, 0);
+ if (duration == LONG_MAX) {
+ if (argc > optind + 2)
+ iter = strtoul(argv[optind + 2], NULL, 0);
+ else
+ iter = count;
printf("running for %lu iterations\n", iter);
- } else
- printf("running for %lu seconds\n", length);
+ } else {
+ iter = LONG_MAX;
+ printf("running for %lu seconds\n", duration);
+ }
- start = last = time(0);
+ start = time(0);
+ last = start;
- t = strrchr(base, '/');
- if (t == NULL) {
- strcpy(parent, ".");
- offset = -1;
- } else {
- strncpy(parent, base, t - base);
- offset = t - base + 1;
- }
+ t = strrchr(base, '/');
+ if (!t) {
+ strcpy(parent, ".");
+ offset = -1;
+ } else {
+ strncpy(parent, base, t - base);
+ offset = t - base + 1;
+ }
if (mode == 'l') {
fd = open(parent, O_RDONLY);
}
}
- for (i = 0; i < iter && time(0) - start < length; i++) {
- char filename[4096];
- int tmp;
+ for (i = 0, now = start; i < iter && now - start < duration; i++) {
+ char filename[4096] = "";
+ int tmp;
- tmp = random() % count;
- sprintf(filename, "%s%d", base, tmp);
+ tmp = random() % count;
+ sprintf(filename, "%s%d", base, tmp);
if (mode == 's') {
- struct stat buf;
-
- rc = stat(filename, &buf);
- if (rc < 0) {
- printf("stat(%s) error: %s\n", filename,
- strerror(errno));
- break;
- }
+ struct stat buf;
+
+ rc = stat(filename, &buf);
+ if (rc < 0) {
+ printf("stat(%s) error: %s\n", filename,
+ strerror(errno));
+ break;
+ }
} else if (mode == 'l') {
char *name = filename;
name += offset;
rc = llapi_file_lookup(fd, name);
- if (rc < 0) {
+ if (rc < 0) {
printf("llapi_file_lookup for (%s) error: %s\n",
filename, strerror(errno));
- break;
- }
- }
- if ((i % 10000) == 0) {
- printf(" - stat %lu (time %ld ; total %ld ; last %ld)\n",
- i, time(0), time(0) - start, time(0) - last);
- last = time(0);
- }
- }
+ break;
+ }
+ }
+ now = time(0);
+ if ((i > 0 && (i % 10000) == 0) || now - last > 10) {
+ printf(" - stat %lu (time %ld ; total %ld ; last %ld)\n",
+ i, now, now - start, now - last);
+ last = now;
+ }
+ }
if (mode == 'l')
close(fd);
- printf("total: %lu stats in %ld seconds: %f stats/second\n", i,
- time(0) - start, ((float)i / (time(0) - start)));
+ printf("total: %lu stats in %ld seconds: %f stats/second\n",
+ i, now - start, ((float)i / (now - start)));
- exit(rc);
+ return rc;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff