Annotation of prex/usr/sample/cpumon/cpumon.c, Revision 1.1.1.1
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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