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Change the default adaptive algorithm for phk's one. Thanks to phk

Browse Source 
and Kevin Oberman for this work.

Submitted by:	Kevin Oberman
Reviewed by:	njl
Approved by:	njl
This commit is contained in:
Bruno Ducrot 2005-08-24 07:52:59 +00:00
parent 4d3b134633
commit 7065e0e9f4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=149410
1 changed files with 13 additions and 11 deletions
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24
usr.sbin/powerd/powerd.c
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@ -425,27 +425,29 @@ main(int argc, char * argv[])
err(1, "read_usage_times");
/*
* If we're idle less than the active mark, jump the CPU to
* its fastest speed if we're not there yet. If we're idle
* more than the idle mark, drop down to the first setting
* that is half the current speed (exponential backoff).
* If we're idle less than the active mark, bump up two levels.
* If we're idle more than the idle mark, drop down one level.
*/
for (i = 0; i < numfreqs - 1; i++) {
if (freqs[i] == curfreq)
break;
}
if (idle < (total * cpu_running_mark) / 100 &&
curfreq < freqs[0]) {
i -= 2;
if (i < 0)
i = 0;
if (vflag) {
printf("idle time < %d%%, increasing clock"
" speed from %d MHz to %d MHz\n",
cpu_running_mark, curfreq, freqs[0]);
cpu_running_mark, curfreq, freqs[i]);
}
if (set_freq(freqs[0]))
if (set_freq(freqs[i]))
err(1, "error setting CPU frequency %d",
freqs[0]);
freqs[i]);
} else if (idle > (total * cpu_idle_mark) / 100 &&
curfreq > freqs[numfreqs - 1]) {
for (i = 0; i < numfreqs - 1; i++) {
if (freqs[i] <= curfreq / 2)
break;
}
i++;
if (vflag) {
printf("idle time > %d%%, decreasing clock"
" speed from %d MHz to %d MHz\n",