scoutos / prex-0.9.0 / usr / sample / cpumon / cpumon.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2005, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * cpumon.c - CPU voltage monitoring program
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32 | */
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33 | |||
34 | #include <sys/prex.h> |
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35 | #include <sys/ioctl.h> |
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36 | #include <stdio.h> |
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37 | |||
38 | static struct cpufreqinfo cf_info; |
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39 | |||
40 | int
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41 | main(int argc, char *argv[]) |
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42 | { |
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43 | device_t dev; |
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44 | int last_mhz = 0; |
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45 | int i, j;
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46 | static char bar[21]; |
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47 | |||
48 | /* Boost current prioriy */
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49 | thread_setpri(thread_self(), 50);
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50 | |||
51 | if (device_open("cpufreq", 0, &dev)) |
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52 | panic("open error: cpufreq");
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53 | |||
54 | /* Clear screen */
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55 | printf("\33[2J");
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56 | |||
57 | printf("CPU voltage monitor\n");
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58 | device_ioctl(dev, CFIOC_GET_INFO, &cf_info); |
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59 | if (cf_info.freq == 0 || cf_info.volts == 0) |
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60 | panic("Invalid cpu power/speed");
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61 | |||
62 | /*
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63 | * Setup periodic timer for 10msec period
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64 | */
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65 | timer_periodic(thread_self(), 100, 10); |
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66 | for (;;) {
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67 | /*
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68 | * Wait next period
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69 | */
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70 | timer_waitperiod(); |
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71 | device_ioctl(dev, CFIOC_GET_INFO, &cf_info); |
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72 | if (cf_info.freq != last_mhz) {
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73 | printf("\33[s"); /* save cursor */ |
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74 | |||
75 | /*
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76 | * Display speed
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77 | */
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78 | printf("\nSpeed: %4dMHz 0|", cf_info.freq);
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79 | j = cf_info.freq * 100 / cf_info.maxfreq;
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80 | for (i = 0; i < 20; i++) |
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81 | bar[i] = (i <= j / 5) ? '*' : '-'; |
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82 | bar[i] = '\0';
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83 | printf("%s|100", bar);
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84 | |||
85 | /*
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86 | * Display power
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87 | */
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88 | printf("\nPower: %4dmV 0|", cf_info.volts);
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89 | j = cf_info.volts * 100 / cf_info.maxvolts;
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90 | for (i = 0; i < 20; i++) |
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91 | bar[i] = (i <= j / 5) ? '*' : '-'; |
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92 | bar[i] = '\0';
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93 | printf("%s|100", bar);
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94 | |||
95 | printf("\33[u"); /* restore cursor */ |
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96 | last_mhz = cf_info.freq; |
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97 | } |
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98 | } |
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99 | return 0; |
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100 | } |