Colony » Colony Scout » Colony Scout OS

/*-

 * 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.

 */

/*

 * cpufreq.c - test cpu frequency controll

 */

/*

 * This program changes the CPU load periodically. Since the cpufreq driver

 * is polling the CPU load, the driver will change the CPU voltage/freqency

 * automatically when CPU becomes idle state.

 *

 * It is recommended to run CPU voltage monitor 'cpumon' with this program.

 */

#include <sys/prex.h>

#include <stdio.h>

static void

set_0_or_100(void)

{

        u_long t1, t2;

        char index[] = "-\\|/";

        char bar[] = "*\033[1D";

        int i, cnt;

        i = 0;

        for (cnt = 0; cnt < 2; cnt++) {

                /*

                 * Display indicator for 5 sec.

                 */

                printf("\rCPU Busy:");

                sys_time(&t1);

                for (;;) {

                        sys_time(&t2);

                        if (t2 > t1 + 5000)

                                break;

                        /*

                         * Update indicator per 100 msec.

                         */

                        if ((t2 % 100) == 0) {

                                bar[0] = index[i++ % 4];

                                printf("%s", bar);

                        }

                }

                /*

                 * Sleep 5 sec.

                 */

                printf("\rCPU Idle  ");

                timer_sleep(5000, 0);

        }

}

static void

set_50(void)

{

        u_long t1, t2;

        char index[] = "-\\|/";

        char bar[] = "*\033[1D";

        int i, cnt;

        printf("\rCPU half speed:");

        i = 0;

        for (cnt = 0; cnt < 5000; cnt++) {

                /*

                 * Update indicator per 100 msec.

                 */

                if ((t2 % 100) == 0) {

                        bar[0] = index[i++ % 4];

                        printf("%s", bar);

                }

                sys_time(&t1);

                for (;;) {

                        sys_time(&t2);

                        if (t2 > t1 + 1)

                                break;

                }

                /*

                 * Sleep 1msec.

                 */

                timer_sleep(1, 0);

        }

}

int

main(int argc, char *argv[])

{

        thread_yield();

        printf("cpufreq test program\n");

        for (;;) {

                set_0_or_100();

                set_50();

        }

        return 0;

}