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Date: Thu, 8 Sep 2011 14:28:22 GMT
From: ultramage <theultramage@gmail.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: no C-states on atom D525
X-Send-Pr-Version: www-3.1
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>Number:         160561
>Category:       amd64
>Synopsis:       no C-states on atom D525
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-amd64
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Sep 08 14:30:09 UTC 2011
>Closed-Date:    Sun Jan 08 12:17:19 UTC 2012
>Last-Modified:  Sun Jan 08 12:17:19 UTC 2012
>Originator:     ultramage
>Release:        9.0-BETA1
>Organization:
>Environment:
FreeBSD poring 9.0-BETA1 FreeBSD 9.0-BETA1 #0: Wed Aug 24 13:04:39 CEST 2011     umage@poporing:/usr/obj/storage/update/src/sys/PORING  amd64
>Description:
Freebsd HEAD running on the intel atom board I have does not provide
C-state power management, all cores run at full power.  BIOS is updated
to latest version.

The motherboard is:
http://www.intel.com/cd/products/services/emea/eng/motherboards/desktop/D525MW/overview/453835.htm
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:

From: umage <umage@netvor.sk>
To: bug-followup@FreeBSD.org, theultramage@gmail.com
Cc:  
Subject: Re: amd64/160561: no C-states on atom D525
Date: Sun, 08 Jan 2012 12:05:42 +0100

 A freebsd user with an identical issue pointed me at
 http://download.intel.com/embedded/processors/prodbrief/323288.pdf which
 lists various atom processors and their "C-states supported". Turns out
 D525 has no C-state power management, so what we encountered was not a
 bug, but an intentional (but not advertised) hardware 'feature'.
State-Changed-From-To: open->closed 
State-Changed-By: avg 
State-Changed-When: Sun Jan 8 12:16:43 UTC 2012 
State-Changed-Why:  
Per the submitter this is not a FreeBSD problem. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=160561 
>Unformatted:
