lkml.org 
[lkml]   [2009]   [Sep]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: BFS vs. mainline scheduler benchmarks and measurements
On 09/08/2009 02:32 PM, Juergen Beisert wrote:
> On Dienstag, 8. September 2009, Nikos Chantziaras wrote:
>> On 09/08/2009 11:38 AM, Arjan van de Ven wrote:
>>> On Tue, 08 Sep 2009 10:19:06 +0300
>>>
>>> Nikos Chantziaras<realnc@arcor.de> wrote:
>>>> latencytop has this to say:
>>>>
>>>> http://foss.math.aegean.gr/~realnc/pics/latop1.png
>>>>
>>>> Though I don't really understand what this tool is trying to tell me,
>>>> I hope someone does.
>>>
>>> despite the untranslated content, it is clear that you have scheduler
>>> delays (either due to scheduler bugs or cpu contention) of upto 68
>>> msecs... Second in line is your binary AMD graphics driver that is
>>> chewing up 14% of your total latency...
>>
>> I've now used a correctly installed and up-to-date version of latencytop
>> and repeated the test. Also, I got rid of AMD's binary blob and used
>> kernel DRM drivers for my graphics card to throw fglrx out of the
>> equation (which btw didn't help; the exact same problems occur).
>>
>> Here the result:
>>
>> http://foss.math.aegean.gr/~realnc/pics/latop2.png
>>
>> Again: this is on an Intel Core 2 Duo CPU.
>
> Just an idea: Maybe some system management code hits you?

I'm not sure what is meant with "system management code."


\
 
 \ /
  Last update: 2009-09-09 00:03    [from the cache]
©2003-2011 Jasper Spaans