Annotation of prex/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, &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, &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: }
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