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scoutos / prex-0.9.0 / usr / test / cpufreq / cpufreq.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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 * cpufreq.c - test cpu frequency controll
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 */
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/*
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 * This program changes the CPU load periodically. Since the cpufreq driver
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 * is polling the CPU load, the driver will change the CPU voltage/freqency
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 * automatically when CPU becomes idle state.
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 *
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 * It is recommended to run CPU voltage monitor 'cpumon' with this program.
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 */
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#include <sys/prex.h>
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#include <stdio.h>
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static void
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set_0_or_100(void)
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{
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        u_long t1, t2;
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        char index[] = "-\\|/";
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        char bar[] = "*\033[1D";
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        int i, cnt;
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        i = 0;
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        for (cnt = 0; cnt < 2; cnt++) {
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                /*
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                 * Display indicator for 5 sec.
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                 */
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                printf("\rCPU Busy:");
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                sys_time(&t1);
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                for (;;) {
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                        sys_time(&t2);
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                        if (t2 > t1 + 5000)
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                                break;
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                        /*
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                         * Update indicator per 100 msec.
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                         */
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                        if ((t2 % 100) == 0) {
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                                bar[0] = index[i++ % 4];
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                                printf("%s", bar);
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                        }
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                }
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                /*
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                 * Sleep 5 sec.
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                 */
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                printf("\rCPU Idle  ");
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                timer_sleep(5000, 0);
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        }
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}
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static void
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set_50(void)
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{
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        u_long t1, t2;
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        char index[] = "-\\|/";
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        char bar[] = "*\033[1D";
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        int i, cnt;
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        printf("\rCPU half speed:");
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        i = 0;
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        for (cnt = 0; cnt < 5000; cnt++) {
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                /*
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                 * Update indicator per 100 msec.
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                 */
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                if ((t2 % 100) == 0) {
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                        bar[0] = index[i++ % 4];
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                        printf("%s", bar);
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                }
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                sys_time(&t1);
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                for (;;) {
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                        sys_time(&t2);
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                        if (t2 > t1 + 1)
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                                break;
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                }
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                /*
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                 * Sleep 1msec.
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                 */
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                timer_sleep(1, 0);
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        }
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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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        thread_yield();
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        printf("cpufreq test program\n");
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        for (;;) {
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                set_0_or_100();
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                set_50();
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        }
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        return 0;
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}