root / 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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} |