Date: Sun, 25 Dec 2005 20:09:57 GMT From: Christian Wittenhorst <wiwi@progon.net> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/90903: cpufreq inconsistency / powerd broken Message-ID: <200512252009.jBPK9vuA090941@www.freebsd.org> Resent-Message-ID: <200512252020.jBPKKApB060424@freefall.freebsd.org>
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>Number: 90903
>Category: kern
>Synopsis: cpufreq inconsistency / powerd broken
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Dec 25 20:20:10 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Christian Wittenhorst
>Release: 6.0p1
>Organization:
progon network engineering
>Environment:
FreeBSD ns-a.kanti-zug.ch 6.0-RELEASE-p1 FreeBSD 6.0-RELEASE-p1 #0: Sun Dec 25 16:55:09 UTC 2005 root@ns-a.kanti-zug.ch:/usr/src/sys/i386/compile/services-a i386
>Description:
one some platforms, dev.cpu.0.freq does not match any value from dev.cpu.0.freq_levels. This brakes powerd.
sysctl -a:
dev.cpu.0.freq: 2798
dev.cpu.0.freq_levels: 2795/-1 2445/-1 2139/-1 2096/-1 1834/-1 1746/-1 1572/-1 1527/-1 1397/-1 1309/-1 1222/-1 1091/-1 1048/-1 917/-1 873/-1 786/-1 698/-1 655/-1 610/-1 523/-1 436/-1 349/-1 305/-1 261/-1 218/-1 174/-1 130/-1 87/-1 43/-1
dev.acpi_throttle.0.freq_settings: 10000/-1 8750/-1 7500/-1 6250/-1 5000/-1 3750/-1 2500/-1 1250/-1
dev.cpufreq.0.%driver: cpufreq
dev.cpufreq.0.%parent: cpu0
The reason why powerd fails is:
src/usr.sbin/powerd/powerd.c:
[...]
if (vflag) {
for (i = 0; i < numfreqs; i++) {
if (freqs[i] == curfreq)
break;
}
[...]
}
>How-To-Repeat:
>Fix:
quick and dirty fix:
src/usr.sbin/powerd/powerd.c:
[...]
if (vflag) {
for (i = 0; i < numfreqs; i++) {
if (freqs[i] == curfreq)
break;
}
***
if (i==numfreqs) {
i=0;
}
***
>Release-Note:
>Audit-Trail:
>Unformatted:
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