usr/sample/bench/bench.c

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This source file includes following definitions.
null_thread
main
   1 /*
   2  * Copyright (c) 2005-2007, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 
  30 /*
  31  * bench.c - benchmark program for running many threads
  32  */
  33 
  34 /*
  35  * Note: The system must have enough memory to run this program.
  36  * At least, 512M bytes of RAM is required to create 100000 threads
  37  * with x86-pc.
  38  */
  39 
  40 #include <sys/prex.h>
  41 #include <stdio.h>
  42 
  43 /*
  44  * Number of threads
  45  */
  46 #define NR_THREADS 10000
  47 
  48 static thread_t *thread;
  49 
  50 void
  51 null_thread(void)
  52 {
  53         for (;;) ;
  54 }
  55 
  56 int
  57 main(int argc, char *argv[])
  58 {
  59         struct timerinfo info;
  60         task_t task;
  61         char stack[16];
  62         u_long start, end;
  63         int i, pri, error;
  64 
  65         printf("Benchmark to create/terminate %d threads\n", NR_THREADS);
  66 
  67         sys_info(INFO_TIMER, &info);
  68         if (info.hz == 0)
  69                 panic("can not get timer tick rate");
  70 
  71         thread_getpri(thread_self(), &pri);
  72         thread_setpri(thread_self(), pri - 1);
  73 
  74         task = task_self();
  75         error = vm_allocate(task, (void **)&thread,
  76                             sizeof(thread_t) * NR_THREADS, 1);
  77         if (error)
  78                 panic("vm_allocate is failed");
  79 
  80         sys_time(&start);
  81 
  82         /*
  83          * Create threads
  84          */
  85         for (i = 0; i < NR_THREADS; i++) {
  86                 if (thread_create(task, &thread[i]) != 0)
  87                         panic("thread_create is failed");
  88 
  89                 if (thread_load(thread[i], null_thread, &stack) != 0)
  90                         panic("thread_load is failed");
  91 
  92                 if (thread_resume(thread[i]) != 0)
  93                         panic("thread_resume is failed");
  94         }
  95 
  96         /*
  97          * Teminate threads
  98          */
  99         for (i = 0; i < NR_THREADS; i++)
 100                 thread_terminate(thread[i]);
 101 
 102         sys_time(&end);
 103 
 104         vm_free(task, thread);
 105 
 106         printf("Complete. The score is %d msec (%d ticks).\n",
 107                (int)((end - start) * 1000 / info.hz),
 108                (int)(end - start));
 109 
 110         return 0;
 111 }
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root/usr/sample/bench/bench.c

DEFINITIONS
