Colony » Colony Scout » Colony Scout OS

/*

 * Copyright (c) 2005, 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.

 */

/*

 * cpumon.c - CPU voltage monitoring program

 */

#include <sys/prex.h>

#include <sys/ioctl.h>

#include <stdio.h>

static struct cpufreqinfo cf_info;

int

main(int argc, char *argv[])

{

        device_t dev;

        int last_mhz = 0;

        int i, j;

        static char bar[21];

        /* Boost current prioriy */

        thread_setpri(thread_self(), 50);

        if (device_open("cpufreq", 0, &dev))

                panic("open error: cpufreq");

        /* Clear screen */

        printf("\33[2J");

        printf("CPU voltage monitor\n");

        device_ioctl(dev, CFIOC_GET_INFO, &cf_info);

        if (cf_info.freq == 0 || cf_info.volts == 0)

                panic("Invalid cpu power/speed");

        /*

         * Setup periodic timer for 10msec period

         */

        timer_periodic(thread_self(), 100, 10);

        for (;;) {

                /*

                 * Wait next period

                 */

                timer_waitperiod();

                device_ioctl(dev, CFIOC_GET_INFO, &cf_info);

                if (cf_info.freq != last_mhz) {

                        printf("\33[s"); /* save cursor */

                        /*

                         * Display speed

                         */

                        printf("\nSpeed: %4dMHz  0|", cf_info.freq);

                        j = cf_info.freq * 100 / cf_info.maxfreq;

                        for (i = 0; i < 20; i++)

                                bar[i] = (i <= j / 5) ? '*' : '-';

                        bar[i] = '\0';

                        printf("%s|100", bar);

                        /*

                         * Display power

                         */

                        printf("\nPower: %4dmV   0|", cf_info.volts);

                        j = cf_info.volts * 100 / cf_info.maxvolts;

                        for (i = 0; i < 20; i++)

                                bar[i] = (i <= j / 5) ? '*' : '-';

                        bar[i] = '\0';

                        printf("%s|100", bar);

                        printf("\33[u"); /* restore cursor */

                        last_mhz = cf_info.freq;

                }

        }

        return 0;

}