2 * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 #include <sys/types.h>
41 #include <sys/param.h>
53 #define WORKER_TIMES 1000
54 #define NUM_WORKER 100
57 getcwd_worker (int num)
62 snprintf (name, sizeof(name), "%d", num);
63 if (mkdir (name, 0777) < 0)
64 err (1, "mkdir %s", name);
66 err (1, "chdir %s", name);
67 for (i = 0; i < WORKER_TIMES; ++i) {
70 getcwd (buf, sizeof(buf));
76 mkdir_worker (int num)
80 for (i = 0; i < WORKER_TIMES; ++i){
83 snprintf (name, sizeof(name), "m%d-%d", num, i);
90 mkdir_rmdir_worker (int num)
94 for (i = 0; i < WORKER_TIMES; ++i){
97 snprintf (name, sizeof(name), "rm%d-%d", num, i);
100 for (i = 0; i < WORKER_TIMES; ++i){
103 snprintf (name, sizeof(name), "rm%d-%d", num, i);
110 rename_worker (int num)
114 for (i = 0; i < WORKER_TIMES; ++i){
118 snprintf (name, sizeof(name), "rm%d-%d", num, i);
119 fd = open (name, O_WRONLY | O_CREAT, 0777);
122 for (i = 0; i < WORKER_TIMES; ++i){
123 char name[256], name2[256];
125 snprintf (name, sizeof(name), "rm%d-%d", num, i);
126 snprintf (name2, sizeof(name2), "rn%d-%d", num, i);
127 rename (name, name2);
133 stat_worker (int num)
140 snprintf (name, sizeof(name), "%d", num);
141 if (mkdir (name, 0777) < 0)
142 err (1, "mkdir %s", name);
143 if (chdir (name) < 0)
144 err (1, "chdir %s", name);
145 for (i = 0; i < WORKER_TIMES; ++i) {
146 getcwd (buf, sizeof(buf));
152 static int (*workers[])(int) = {getcwd_worker, mkdir_worker,
153 mkdir_rmdir_worker, rename_worker,
156 static int nworkers = sizeof(workers)/sizeof(*workers);
159 main(int argc, char **argv)
164 for (i = 0; i < NUM_WORKER ; i++) {
170 return (*workers[i % nworkers])(i);
176 while (i && wait (&ret)) {
179 err (1, "wait: %d", ret);