jimzah/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src.git synced 2024-12-04 10:19:26 +00:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

Add support for recording the total energy used (in joules) when in

Browse Source 
verbose mode.  This is useful for profiling new adaptive algorithms
in performance (via time(1)) and total energy consumed for a given
workload.
This commit is contained in:
Nate Lawson 2005-04-10 19:02:29 +00:00
parent 7e266fcd1f
commit ab19351c39
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=144873
1 changed files with 47 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
usr.sbin/powerd/powerd.c
View File

@ -30,6 +30,7 @@ __FBSDID("$FreeBSD$");
#include <err.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -69,10 +70,11 @@ const char *modes[] = {
#define APMDEV "/dev/apm"
static int read_usage_times(long *idle, long *total);
static int read_freqs(int *numfreqs, int **freqs);
static int read_freqs(int *numfreqs, int **freqs, int **power);
static int set_freq(int freq);
static void acline_init(void);
static int acline_read(void);
static void handle_sigs(int sig);
static void parse_mode(char *arg, int *mode, int ch);
static void usage(void);
@ -88,6 +90,7 @@ static int cpu_idle_mark;
static int poll_ival;
static int apm_fd;
static int exit_requested;
static int
read_usage_times(long *idle, long *total)
@ -116,7 +119,7 @@ read_usage_times(long *idle, long *total)
}
static int
read_freqs(int *numfreqs, int **freqs)
read_freqs(int *numfreqs, int **freqs, int **power)
{
char *freqstr, *p, *q;
int i;
@ -138,13 +141,19 @@ read_freqs(int *numfreqs, int **freqs)
free(freqstr);
return (-1);
}
if ((*power = malloc(*numfreqs * sizeof(int))) == NULL) {
free(freqstr);
free(*freqs);
return (-1);
}
for (i = 0, p = freqstr; i < *numfreqs; i++) {
q = strchr(p, ' ');
if (q != NULL)
*q = '\0';
if (sscanf(p, "%d/%*d", &(*freqs)[i]) != 1) {
if (sscanf(p, "%d/%d", &(*freqs)[i], &(*power)[i]) != 2) {
free(freqstr);
free(*freqs);
free(*power);
return (-1);
}
p = q + 1;
@ -224,6 +233,12 @@ parse_mode(char *arg, int *mode, int ch)
errx(1, "bad option: -%c %s", (char)ch, optarg);
}
static void
handle_sigs(int __unused sig)
{
exit_requested = 1;
}
static void
usage(void)
{
@ -237,8 +252,9 @@ int
main(int argc, char * argv[])
{
long idle, total;
int curfreq, *freqs, i, numfreqs;
int curfreq, *freqs, i, *mwatts, numfreqs;
int ch, mode_ac, mode_battery, mode_none, acline, mode, vflag;
uint64_t mjoules_used;
size_t len;
/* Default mode for all AC states is adaptive. */
@ -246,6 +262,7 @@ main(int argc, char * argv[])
cpu_running_mark = DEFAULT_ACTIVE_PERCENT;
cpu_idle_mark = DEFAULT_IDLE_PERCENT;
poll_ival = DEFAULT_POLL_INTERVAL;
mjoules_used = 0;
vflag = 0;
apm_fd = -1;
@ -307,7 +324,7 @@ main(int argc, char * argv[])
/* Check if we can read the idle time and supported freqs. */
if (read_usage_times(NULL, NULL))
err(1, "read_usage_times");
if (read_freqs(&numfreqs, &freqs))
if (read_freqs(&numfreqs, &freqs, &mwatts))
err(1, "error reading supported CPU frequencies");
/* Decide whether to use ACPI or APM to read the AC line status. */
@ -316,12 +333,23 @@ main(int argc, char * argv[])
/* Run in the background unless in verbose mode. */
if (!vflag)
daemon(0, 0);
signal(SIGINT, handle_sigs);
signal(SIGTERM, handle_sigs);
/* Main loop. */
for (;;) {
/* Check status every few milliseconds. */
usleep(poll_ival);
/* If the user requested we quit, print some statistics. */
if (exit_requested) {
if (vflag && mjoules_used != 0)
printf("total joules used: %u.%03u\n",
(u_int)(mjoules_used / 1000),
(int)mjoules_used % 1000);
break;
}
/* Read the current AC status and record the mode. */
acline = acline_read();
switch (acline) {
@ -343,6 +371,18 @@ main(int argc, char * argv[])
if (sysctl(freq_mib, 4, &curfreq, &len, NULL, 0))
err(1, "error reading current CPU frequency");
if (vflag) {
for (i = 0; i < numfreqs; i++) {
if (freqs[i] == curfreq)
break;
}
/* Keep a sum of all power actually used. */
if (i < numfreqs && mwatts[i] != -1)
mjoules_used +=
(mwatts[i] * (poll_ival / 1000)) / 1000;
}
/* Always switch to the lowest frequency in min mode. */
if (mode == MODE_MIN) {
if (curfreq != freqs[numfreqs - 1]) {
@ -409,7 +449,8 @@ main(int argc, char * argv[])
freqs[i]);
}
}
/* NOTREACHED */
free(freqs);
free(mwatts);
exit(0);
}