Annotation of prex/usr/sample/bench/bench.c, Revision 1.1
1.1 ! nbrk 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 i386-pc.
! 38: */
! 39:
! 40: #include <prex/prex.h>
! 41: #include <stdio.h>
! 42:
! 43: /*
! 44: * Number of threads
! 45: */
! 46: #define NR_THREADS 100000
! 47:
! 48: static thread_t *th;
! 49:
! 50: void
! 51: null_thread(void)
! 52: {
! 53: for (;;) ;
! 54: }
! 55:
! 56: int
! 57: main(int argc, char *argv[])
! 58: {
! 59: struct info_timer info;
! 60: task_t task;
! 61: char stack[16];
! 62: u_long start, end;
! 63: int i, prio, err;
! 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_getprio(thread_self(), &prio);
! 72: thread_setprio(thread_self(), prio - 1);
! 73:
! 74: task = task_self();
! 75: err = vm_allocate(task, (void **)&th, sizeof(thread_t) * NR_THREADS, 1);
! 76: if (err)
! 77: panic("vm_allocate is failed");
! 78:
! 79: sys_time(&start);
! 80:
! 81: /*
! 82: * Create threads
! 83: */
! 84: for (i = 0; i < NR_THREADS; i++) {
! 85: if (thread_create(task, &th[i]) != 0)
! 86: panic("thread_create is failed");
! 87:
! 88: if (thread_load(th[i], null_thread, &stack) != 0)
! 89: panic("thread_load is failed");
! 90:
! 91: if (thread_resume(th[i]) != 0)
! 92: panic("thread_resume is failed");
! 93: }
! 94:
! 95: /*
! 96: * Teminate threads
! 97: */
! 98: for (i = 0; i < NR_THREADS; i++)
! 99: thread_terminate(th[i]);
! 100:
! 101: sys_time(&end);
! 102:
! 103: vm_free(task, th);
! 104:
! 105: printf("Complete. The score is %d msec (%d ticks).\n",
! 106: (int)((end - start) * 1000 / info.hz),
! 107: (int)(end - start));
! 108:
! 109: return 0;
! 110: }
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