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scoutos / prex-0.9.0 / usr / sample / bench / bench.c @ 03e9c04a

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/*
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 * Copyright (c) 2005-2007, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * bench.c - benchmark program for running many threads
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 */
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/*
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 * Note: The system must have enough memory to run this program.
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 * At least, 512M bytes of RAM is required to create 100000 threads
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 * with x86-pc.
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 */
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#include <sys/prex.h>
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#include <stdio.h>
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/*
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 * Number of threads
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 */
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#define NR_THREADS 10000
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static thread_t *thread;
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void
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null_thread(void)
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{
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        for (;;) ;
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}
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int
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main(int argc, char *argv[])
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{
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        struct timerinfo info;
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        task_t task;
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        char stack[16];
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        u_long start, end;
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        int i, pri, error;
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        printf("Benchmark to create/terminate %d threads\n", NR_THREADS);
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        sys_info(INFO_TIMER, &info);
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        if (info.hz == 0)
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                panic("can not get timer tick rate");
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        thread_getpri(thread_self(), &pri);
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        thread_setpri(thread_self(), pri - 1);
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        task = task_self();
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        error = vm_allocate(task, (void **)&thread,
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                            sizeof(thread_t) * NR_THREADS, 1);
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        if (error)
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                panic("vm_allocate is failed");
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        sys_time(&start);
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        /*
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         * Create threads
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         */
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        for (i = 0; i < NR_THREADS; i++) {
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                if (thread_create(task, &thread[i]) != 0)
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                        panic("thread_create is failed");
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                if (thread_load(thread[i], null_thread, &stack) != 0)
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                        panic("thread_load is failed");
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                if (thread_resume(thread[i]) != 0)
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                        panic("thread_resume is failed");
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        }
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        /*
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         * Teminate threads
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         */
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        for (i = 0; i < NR_THREADS; i++)
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                thread_terminate(thread[i]);
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        sys_time(&end);
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        vm_free(task, thread);
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        printf("Complete. The score is %d msec (%d ticks).\n",
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               (int)((end - start) * 1000 / info.hz),
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               (int)(end - start));
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        return 0;
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}