tests/test-parallel2.c

   1 /*
   2  * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  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.
  16  *
  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.
  20  *
  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
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  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
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <sys/types.h>
  40 #include <sys/wait.h>
  41 #include <sys/param.h>
  42 #include <sys/stat.h>
  43 #include <unistd.h>
  44
  45 #include <err.h>
  46 #include <roken.h>
  47
  48 #include <atypes.h>
  49 #include <kafs.h>
  50
  51 #ifdef RCSID
  52 RCSID("$Id$");
  53 #endif
  54
  55 #define WORKER_TIMES 1000
  56 #define NUM_WORKER 100
  57
  58 static int
  59 getcwd_worker (int num)
  60 {
  61     char name[17];
  62     int i;
  63
  64     snprintf (name, sizeof(name), "%d", num);
  65     if (mkdir (name, 0777) < 0)
  66         err (1, "mkdir %s", name);
  67     if (chdir (name) < 0)
  68         err (1, "chdir %s", name);
  69     for (i = 0; i < WORKER_TIMES; ++i) {
  70         char buf[256];
  71
  72         getcwd (buf, sizeof(buf));
  73     }
  74     return 0;
  75 }
  76
  77 static int
  78 mkdir_worker (int num)
  79 {
  80     int i;
  81
  82     for (i = 0; i < WORKER_TIMES; ++i){
  83         char name[256];
  84
  85         snprintf (name, sizeof(name), "m%d-%d", num, i);
  86         mkdir (name, 0777);
  87     }
  88     return 0;
  89 }
  90
  91 static int
  92 mkdir_rmdir_worker (int num)
  93 {
  94     int i;
  95
  96     for (i = 0; i < WORKER_TIMES; ++i){
  97         char name[256];
  98
  99         snprintf (name, sizeof(name), "rm%d-%d", num, i);
 100         mkdir (name, 0777);
 101     }
 102     for (i = 0; i < WORKER_TIMES; ++i){
 103         char name[256];
 104
 105         snprintf (name, sizeof(name), "rm%d-%d", num, i);
 106         rmdir (name);
 107     }
 108     return 0;
 109 }
 110
 111 static int
 112 rename_worker (int num)
 113 {
 114     int i;
 115
 116     for (i = 0; i < WORKER_TIMES; ++i){
 117         char name[256];
 118         int fd;
 119
 120         snprintf (name, sizeof(name), "rm%d-%d", num, i);
 121         fd = open (name, O_WRONLY | O_CREAT, 0777);
 122         close (fd);
 123     }
 124     for (i = 0; i < WORKER_TIMES; ++i){
 125         char name[256], name2[256];
 126
 127         snprintf (name, sizeof(name), "rm%d-%d", num, i);
 128         snprintf (name2, sizeof(name2), "rn%d-%d", num, i);
 129         rename (name, name2);
 130     }
 131     return 0;
 132 }
 133
 134 static int
 135 stat_worker (int num)
 136 {
 137     char name[17];
 138     int i;
 139     char buf[256];
 140     struct stat sb;
 141
 142     snprintf (name, sizeof(name), "%d", num);
 143     if (mkdir (name, 0777) < 0)
 144         err (1, "mkdir %s", name);
 145     if (chdir (name) < 0)
 146         err (1, "chdir %s", name);
 147     for (i = 0; i < WORKER_TIMES; ++i) {
 148         getcwd (buf, sizeof(buf));
 149         stat (buf, &sb);
 150     }
 151     return 0;
 152 }
 153
 154 static int (*workers[])(int) = {getcwd_worker, mkdir_worker,
 155                                 mkdir_rmdir_worker, rename_worker,
 156                                 stat_worker};
 157
 158 static int nworkers = sizeof(workers)/sizeof(*workers);
 159
 160 int
 161 main(int argc, char **argv)
 162 {
 163     int i, ret;
 164
 165     setprogname (argv[0]);
 166
 167     for (i = 0; i < NUM_WORKER ; i++) {
 168         int ret;
 169
 170         ret = fork();
 171         switch (ret) {
 172         case 0:
 173             return (*workers[i % nworkers])(i);
 174         case -1:
 175             err (1, "fork");
 176         }
 177     }
 178     i = NUM_WORKER;
 179     while (i && wait (&ret)) {
 180         i--;
 181         if (ret)
 182             err (1, "wait: %d", ret);
 183     }
 184     return 0;
 185 }