1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 #include <sys/types.h>
50 void usage(char *prog)
52 printf("usage: %s {-o|-m|-l<tgt>} filenamefmt count\n", prog);
53 printf(" %s {-o|-m|-l<tgt>} filenamefmt -seconds\n", prog);
54 printf(" %s {-o|-m|-l<tgt>} filenamefmt start count\n", prog);
57 /* Print process rank, loop count, message, and exit (i.e. a fatal error) */
58 int rprintf(int rank, int loop, const char *fmt, ...)
62 printf("rank %d, loop %d: ", rank, loop);
72 int main(int argc, char ** argv)
74 int i, rc = 0, do_open = 0, do_link = 0, rank;
75 char format[4096], *fmt, *tgt = NULL;
77 long start, last, end;
78 long begin = 0, count;
80 rc = MPI_Init(&argc, &argv);
81 if (rc != MPI_SUCCESS)
82 rprintf(-1, -1, "MPI_Init failed: %d\n", rc);
84 if (argc < 4 || argc > 5) {
89 if (strcmp(argv[1], "-o") == 0) {
92 } else if (strncmp(argv[1], "-l", 2) == 0 && argv[1][2]) {
95 } else if (strcmp(argv[1], "-m") != 0) {
100 if (strlen(argv[2]) > 4080) {
101 printf("name too long\n");
105 rc = MPI_Comm_rank(MPI_COMM_WORLD, &rank);
106 if (rc != MPI_SUCCESS)
107 rprintf(-1, -1, "MPI_Comm_rank failed: %d\n", rc);
109 rc = MPI_Barrier(MPI_COMM_WORLD);
110 if (rc != MPI_SUCCESS)
111 rprintf(rank, -1, "prep MPI_Barrier failed: %d\n", rc);
113 start = last = time(0);
116 end = strtol(argv[3], NULL, 0);
118 begin = strtol(argv[3], NULL, 0);
119 end = strtol(argv[4], NULL, 0);
129 if (strchr(argv[2], '%'))
132 sprintf(format, "%s%%d", argv[2]);
135 printf("starting at %s", ctime(&start));
136 for (i = 0; i < count && time(0) < end; i++, begin++) {
137 sprintf(filename, fmt, begin);
139 int fd = open(filename, O_CREAT|O_RDWR, 0644);
141 printf("open(%s) error: %s\n", filename,
147 } else if (do_link) {
148 rc = link(tgt, filename);
150 printf("link(%s, %s) error: %s\n",
151 tgt, filename, strerror(errno));
156 rc = mknod(filename, S_IFREG| 0444, 0);
158 printf("mknod(%s) error: %s\n",
159 filename, strerror(errno));
164 if ((i % 10000) == 0) {
165 printf(" - created %d (time %ld total %ld last %ld)\n",
166 i, time(0), time(0) - start, time(0) - last);
170 printf("total: %d creates in %ld seconds: %f creates/second\n", i,
171 time(0) - start, ((float)i / (time(0) - start)));
173 printf("finish at %s", ctime(&start));