lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <4AA62E4E.4040700@arcor.de>
Date:	Tue, 08 Sep 2009 13:13:34 +0300
From:	Nikos Chantziaras <realnc@...or.de>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	linux-kernel@...r.kernel.org
Subject: Re: BFS vs. mainline scheduler benchmarks and measurements

On 09/08/2009 11:38 AM, Arjan van de Ven wrote:
> On Tue, 08 Sep 2009 10:19:06 +0300
> Nikos Chantziaras<realnc@...or.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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ