Date: Mon, 2 Feb 2004 22:16:23 +0100 From: Robert Blacquiere <freebsd-current@guldan.demon.nl> To: freebsd-current@freebsd.org Subject: small sample program for speedstep and temperatue Message-ID: <20040202211623.GA28219@bombur.guldan.demon.nl>
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Hi,
I've been working on a small programm for controlling cpu speed
and temperature. I noticed my laptop runs warm/hot too hot accourding
to me. So made first a perl script but did not like it so tried a
c programm to do the same. Oh don't make funny remarks on the code
just starting programming c.
Please feel free to make comments and maybe help build a better one
for controlling temperature and speedstep.
Robert
--
Microsoft: Where do you want to go today?
Linux: Where do you want to go tomorrow?
FreeBSD: Are you guys coming or what?
OpenBSD: Hey guys you left some holes out there!
--sdtB3X0nJg68CQEu
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/**************************************************************
* *
* cpumon a proram to monitor cpu temperature and speedstep *
* features. It works as a daemon in de background reading *
* with sysctl calls tz0 and cpu parameters *
* *
* This program is as is and follows the bsd license *
* initial programming done by: robert@blacquiere.nl *
* *
***************************************************************/
#define KELVIN_TO_CELSIUS(t) ((t-2732+5)/10)
#include <stdio.h>
#include <unistd.h>
void usage (char **argv) {
fprintf (stdout,
"\n"
"usage:\t%s [-h] [-a stepping] [-b stepping] [-c temp]\n"
"\t\t[-w temp] [-s slowing]\n"
"-a: speedstep setting ac online\n"
"-b: speedstep setting battery powered\n"
"-c: low temperature setting Celius\n"
"-w: hot temperature setting Celius\n"
"-s: slow increase decrease stepping\n"
"-h: this help message\n",
argv[0]);
exit(0);
}
int main(int argc, char **argv)
{
int ret;
int temp;
size_t len_temp = sizeof(temp);
int throttle;
size_t len_throttle = sizeof(throttle);
int mthrottle;
size_t len_mthrottle = sizeof(mthrottle);
int acline;
size_t len_acline = sizeof(acline);
int speedstep ;
extern char *optarg;
extern int optind;
int ch;
int battery_powered = 2;
int ac_powered = 4;
int low_temp = 60;
int hot_temp = 70;
int slow = 5;
int slowing = 0;
while ((ch = getopt(argc, argv, "hb:a:w:c:s:")) != -1 )
switch (ch) {
case 'b':
battery_powered = atoi(optarg);
break;
case 'a':
ac_powered = atoi(optarg);
break;
case 'c':
low_temp = atoi(optarg);
break;
case 'w':
hot_temp = atoi(optarg);
break;
case 's':
slow = atoi(optarg);
break;
case 'h':
usage(argv);
break;
}
argc -= optind;
argv += optind;
printf("Using values: -b %d\t-a %d\t-w %d\t-c %d\t-s %d\n", battery_powered, ac_powered, hot_temp, low_temp, slow);
while (1) {
ret=sysctlbyname("hw.acpi.thermal.tz0.temperature",&temp,&len_temp,NULL,0);
if (ret != 0 ) printf("failed temperature\n");
ret=sysctlbyname("hw.acpi.acline",&acline,&len_acline,NULL,0);
if (ret != 0 ) printf("failed acline\n");
ret=sysctlbyname("hw.acpi.cpu.throttle_state",&throttle,&len_throttle,NULL,0);
if (ret != 0 ) printf("failed throttle state\n");
ret=sysctlbyname("hw.acpi.cpu.throttle_max",&mthrottle,&len_mthrottle,NULL,0);
if (ret != 0 ) printf("failed throttle max\n");
printf("cpu: %d C\t",KELVIN_TO_CELSIUS(temp));
speedstep = ( throttle * 100 ) / mthrottle ;
printf("CPU speed: %d %%\n", speedstep);
if ( acline == 0 && throttle > battery_powered ) {
// printf("acline = %d\tthrottle = %d\tbattery_powered = %d\n", acline, throttle, battery_powered);
// printf("AC offline and cpu runs on higher stepping\n");
throttle = battery_powered;
size_t len_throttle = sizeof(throttle);
ret=sysctlbyname("hw.acpi.cpu.throttle_state",NULL,NULL,&throttle,&len_throttle);
if (ret != 0 ) printf("set throttle_state failed\n");
}
if (acline == 1 && throttle < ac_powered ) {
// printf("acline = %d\tthrottle = %d\tac_powered = %d\n", acline, throttle, ac_powered);
// printf("AC online and cpu runs on lower stepping\n");
throttle = ac_powered;
size_t len_throttle = sizeof(throttle);
ret=sysctlbyname("hw.acpi.cpu.throttle_state",NULL,NULL,&throttle,&len_throttle);
if (ret != 0 ) printf("set throttle_state failed\n");
}
if ( KELVIN_TO_CELSIUS(temp) > hot_temp ) {
// printf("temp = %d\thot_temp = %d\n", temp, hot_temp);
if ( throttle > 1 && slowing == 0 ) {
// printf("It seems i'me hotter as usual trying to cool my self\n");
--throttle;
slowing = slow;
size_t len_throttle = sizeof(throttle);
ret=sysctlbyname("hw.acpi.cpu.throttle_state",NULL,NULL,&throttle,&len_throttle);
if (ret != 0 ) printf("set throttle_state failed\n");
}
if ( --slowing <=0 ) {
slowing = 0;
}
}
if ( KELVIN_TO_CELSIUS(temp) < low_temp ) {
if ( acline == 1 && throttle < ac_powered && slowing == 0 ) {
// printf("It seems i've cooled my self down enough speeding up\n");
++throttle;
slowing = slow;
size_t len_throttle = sizeof(throttle);
ret=sysctlbyname("hw.acpi.cpu.throttle_state",NULL,0,&throttle,&len_throttle);
if (ret != 0 ) printf("set throttle_state failed\n");
}
if ( acline == 0 && throttle < battery_powered && slowing == 0 ) {
// printf("It seems i've cooled my self down enough speeding up\n");
++throttle;
slowing = slow;
size_t len_throttle = sizeof(throttle);
ret=sysctlbyname("hw.acpi.cpu.throttle_state",NULL,0,&throttle,&len_throttle);
if (ret != 0 ) printf("set throttle_state failed\n");
}
if (--slowing <= 0) {
slowing = 0;
}
}
sleep(5);
}
return(0);
}
--sdtB3X0nJg68CQEu--
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