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Message-Id: <200510120700.j9C70vIA090479@www.freebsd.org>
Date: Wed, 12 Oct 2005 07:00:57 GMT
From: Justin Suyk <jsuyk@signet.nl>
To: freebsd-gnats-submit@FreeBSD.org
Subject: Dual Opteron / FreeBSD 5 & 6 / powerd results in hard hangs
X-Send-Pr-Version: www-2.3

>Number:         87305
>Category:       amd64
>Synopsis:       [smp] Dual Opteron / FreeBSD 5 & 6 / powerd results in hard hangs
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    jh
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 12 07:10:12 GMT 2005
>Closed-Date:    Thu Oct 14 18:48:39 UTC 2010
>Last-Modified:  Thu Oct 14 18:48:39 UTC 2010
>Originator:     Justin Suyk
>Release:        FreeBSD 5.4-RELEASE-p7 & FreeBSD 6.0-RC1
>Organization:
Signet internet
>Environment:
FreeBSD son-ws1-dc1.signet.nl 5.4-RELEASE-p7 FreeBSD 5.4-RELEASE-p7 #1: Tue Oct 25 12:46:39 CEST 2005     root@:/usr/obj/usr/src/sys/SMP  amd64
>Description:
We have a dual Opteron server which supports the PowerNow technology and
that technology we want to use to save unneeded power.  For that reason
we are trying to get powerd and cpufreq going, but we are running in a
lot of troubles when we ennable the powerd program.  Under 5.4 RELEASE
and stable hard hangs are occuring just 2 seconds after enabling powerd
and under FreeBSD 6 the machines hangs after about a minute or two.

Under 5.4 we noticed that only one of the CPU was triggered by powerd,
and thus resulting in a hard crash because the other CPU was still
running full speed. Under 6 that was fixed, the two CPUs were seen as
one CPU by powerd and so the trigger to run on a lower clockspeed was
picked up by the Opterons.  But after 2 minutes the machine hangs again.
>How-To-Repeat:
Under 5.4, compile the new kernel with cpufreq support and try starting
powerd, the machine hangs after about 2 seconds.  Under 6 RC1 the machine
hangs, but after 2 minutes instead of 2 seconds.
>Fix:
No fix kwown to us
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback 
State-Changed-By: jh 
State-Changed-When: Fri Sep 3 06:51:48 UTC 2010 
State-Changed-Why:  
Can you still reproduce this on 8.1 or later? 


Responsible-Changed-From-To: freebsd-amd64->jh 
Responsible-Changed-By: jh 
Responsible-Changed-When: Fri Sep 3 06:51:48 UTC 2010 
Responsible-Changed-Why:  
Track. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=87305 
State-Changed-From-To: feedback->closed 
State-Changed-By: jh 
State-Changed-When: Thu Oct 14 18:48:38 UTC 2010 
State-Changed-Why:  
Feedback timeout. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=87305 
>Unformatted:
