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Annotation of prex-old/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: }