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Annotation of prex-old/usr/sample/cpumon/cpumon.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005, 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:  * cpumon.c - CPU voltage monitoring program
        !            32:  */
        !            33:
        !            34: #include <prex/prex.h>
        !            35: #include <sys/ioctl.h>
        !            36: #include <stdio.h>
        !            37:
        !            38: static struct cpu_info cpu_info;
        !            39: static struct cpu_stat cpu_stat;
        !            40:
        !            41: int
        !            42: main(int argc, char *argv[])
        !            43: {
        !            44:        device_t cpu_dev;
        !            45:        int last_mhz = 0;
        !            46:        int i, j;
        !            47:        static char bar[21];
        !            48:
        !            49:        /* Boost current prioriy */
        !            50:        thread_setprio(thread_self(), 50);
        !            51:
        !            52:        if (device_open("cpu", 0, &cpu_dev))
        !            53:                panic("open error: cpu");
        !            54:
        !            55:        /* Clear screen */
        !            56:        printf("\33[2J");
        !            57:
        !            58:        printf("CPU voltage monitor\n");
        !            59:        device_ioctl(cpu_dev, CPUIOC_GET_INFO, (u_long)&cpu_info);
        !            60:        if (cpu_info.clock_ctrl == 0)
        !            61:                panic("DVS not supported by cpu");
        !            62:        if (cpu_info.speed == 0 || cpu_info.power == 0)
        !            63:                panic("Invalid cpu power/speed");
        !            64:
        !            65:        /*
        !            66:         * Setup periodic timer for 10msec period
        !            67:         */
        !            68:        timer_periodic(thread_self(), 100, 10);
        !            69:        for (;;) {
        !            70:                /*
        !            71:                 * Wait next period
        !            72:                 */
        !            73:                timer_waitperiod();
        !            74:                device_ioctl(cpu_dev, CPUIOC_GET_STAT, (u_long)&cpu_stat);
        !            75:                if (cpu_stat.speed != last_mhz) {
        !            76:                        printf("\33[s"); /* save cursor */
        !            77:
        !            78:                        /*
        !            79:                         * Display speed
        !            80:                         */
        !            81:                        printf("\nSpeed: %4dMHz  0|", cpu_stat.speed);
        !            82:                        j = cpu_stat.speed * 100 / cpu_info.speed;
        !            83:                        for (i = 0; i < 20; i++)
        !            84:                                bar[i] = (i <= j / 5) ? '*' : '-';
        !            85:                        bar[i] = '\0';
        !            86:                        printf(bar);
        !            87:                        printf("|100");
        !            88:
        !            89:                        /*
        !            90:                         * Display power
        !            91:                         */
        !            92:                        printf("\nPower: %4dmV   0|", cpu_stat.power);
        !            93:                        j = cpu_stat.power * 100 / cpu_info.power;
        !            94:                        for (i = 0; i < 20; i++)
        !            95:                                bar[i] = (i <= j / 5) ? '*' : '-';
        !            96:                        bar[i] = '\0';
        !            97:                        printf(bar);
        !            98:                        printf("|100");
        !            99:
        !           100:                        printf("\33[u"); /* restore cursor */
        !           101:                        last_mhz = cpu_stat.speed;
        !           102:                }
        !           103:        }
        !           104:        return 0;
        !           105: }