linux-kernel - Re: [PATCH] turbostat, servers do not support uncore power register

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Date:	Sun, 19 Jan 2014 08:21:20 -0500
From:	Prarit Bhargava <prarit@...hat.com>
To:	Len Brown <lenb@...nel.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Len Brown <len.brown@...el.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Josh Triplett <josh@...htriplett.org>,
	Kristen Carlson Accardi <kristen@...ux.intel.com>
Subject: Re: [PATCH] turbostat, servers do not support uncore power register



On 01/18/2014 10:50 PM, Len Brown wrote:
> On Thu, Dec 19, 2013 at 7:27 PM, Prarit Bhargava <prarit@...hat.com> wrote:
>> From the Intel Software Developer's Manual section 14.7.4,
>>
>> "For server platforms, PP1 domain is not supported, but its PP0 domain
>> supports the MSR_PP0_PERF_STATUS interface."
>>
>> When I run 'turbostat ls' I see the following error:
>>
>> /dev/cpu/0/msr offset 0x641 read failed
> 
> Let me know if you see this when running turbostat v3.6 or later.
> you can find  that version in the linux-next tree.
> 

Len, looks like v3.6 works -- I'll do some additional testing to confirm but
AFAICT it does work on the affected systems.

P.

> thanks,
> Len Brown, Intel Open Source Technology Center
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