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DEFINITIONS

1. set_0_or_100
2. set_50
3. main

   1 /*-
   2  * Copyright (c) 2005-2007, 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  */
  30 /*
  31  * cpufreq.c - test cpu frequency controll
  32  */
  34 /*
  35  * This program changes the CPU load periodically. Since the cpufreq driver
  36  * is polling the CPU load, the driver will change the CPU voltage/freqency
  37  * automatically when CPU becomes idle state.
  38  *
  39  * It is recommended to run CPU voltage monitor 'cpumon' with this program.
  40  */
  42 #include <sys/prex.h>
  43 #include <stdio.h>
  45 static void
set_0_or_100(void)
  47 {
u_long t1, t2;
  49         char index[] = "-\\|/";
  50         char bar[] = "*\033[1D";
  51         int i, cnt;
i = 0;
  54         for (cnt = 0; cnt < 2; cnt++) {
  55                 /*
  56                  * Display indicator for 5 sec.
  57                  */
printf("\rCPU Busy:");
sys_time(&t1);
  60                 for (;;) {
sys_time(&t2);
  62                         if (t2 > t1 + 5000)
  63                                 break;
  64                         /*
  65                          * Update indicator per 100 msec.
  66                          */
  67                         if ((t2 % 100) == 0) {
bar[0] = index[i++ % 4];
printf("%s", bar);
  70                         }
  71                 }
  72                 /*
  73                  * Sleep 5 sec.
  74                  */
printf("\rCPU Idle  ");
timer_sleep(5000, 0);
  77         }
  78 }
  80 static void
set_50(void)
  82 {
u_long t1, t2;
  84         char index[] = "-\\|/";
  85         char bar[] = "*\033[1D";
  86         int i, cnt;
printf("\rCPU half speed:");
i = 0;
  90         for (cnt = 0; cnt < 5000; cnt++) {
  91                 /*
  92                  * Update indicator per 100 msec.
  93                  */
  94                 if ((t2 % 100) == 0) {
bar[0] = index[i++ % 4];
printf("%s", bar);
  97                 }
sys_time(&t1);
  99                 for (;;) {
sys_time(&t2);
 101                         if (t2 > t1 + 1)
 102                                 break;
 103                 }
 104                 /*
 105                  * Sleep 1msec.
 106                  */
timer_sleep(1, 0);
 108         }
 109 }
 111 int
main(int argc, char *argv[])
 113 {
thread_yield();
printf("cpufreq test program\n");
 118         for (;;) {
set_0_or_100();
set_50();
 121         }
 122         return 0;
 123 }