File: [local] / prex / usr / sample / bench / bench.c (download)
Revision 1.1.1.1 (vendor branch), Tue Aug 19 12:47:01 2008 UTC (16 years ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, HEAD Changes since 1.1: +0 -0 lines
Initial import of Prex, Portable Real-time Embedded POSIX microkernel system.
I have totally new directions in my development (more focused on real hardware, not virtual one).
Old hacks are available in prex-old module. They will be carefully re-designed and merged soon.
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/*
* Copyright (c) 2005-2007, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* bench.c - benchmark program for running many threads
*/
/*
* Note: The system must have enough memory to run this program.
* At least, 512M bytes of RAM is required to create 100000 threads
* with i386-pc.
*/
#include <prex/prex.h>
#include <stdio.h>
/*
* Number of threads
*/
#define NR_THREADS 100000
static thread_t *th;
void
null_thread(void)
{
for (;;) ;
}
int
main(int argc, char *argv[])
{
struct info_timer info;
task_t task;
char stack[16];
u_long start, end;
int i, prio, err;
printf("Benchmark to create/terminate %d threads\n", NR_THREADS);
sys_info(INFO_TIMER, &info);
if (info.hz == 0)
panic("can not get timer tick rate");
thread_getprio(thread_self(), &prio);
thread_setprio(thread_self(), prio - 1);
task = task_self();
err = vm_allocate(task, (void **)&th, sizeof(thread_t) * NR_THREADS, 1);
if (err)
panic("vm_allocate is failed");
sys_time(&start);
/*
* Create threads
*/
for (i = 0; i < NR_THREADS; i++) {
if (thread_create(task, &th[i]) != 0)
panic("thread_create is failed");
if (thread_load(th[i], null_thread, &stack) != 0)
panic("thread_load is failed");
if (thread_resume(th[i]) != 0)
panic("thread_resume is failed");
}
/*
* Teminate threads
*/
for (i = 0; i < NR_THREADS; i++)
thread_terminate(th[i]);
sys_time(&end);
vm_free(task, th);
printf("Complete. The score is %d msec (%d ticks).\n",
(int)((end - start) * 1000 / info.hz),
(int)(end - start));
return 0;
}