linux-kernel - Re: realtime preemption performance difference

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Date:	Wed, 26 Sep 2007 19:00:37 +0530
From:	ankita@...ibm.com (Ankita Garg)
To:	Jaswinder Singh <jaswinderlinux@...il.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu
Subject: Re: realtime preemption performance difference

Hi Jaswinder,

On Mon, Sep 24, 2007 at 05:18:01PM +0530, Jaswinder Singh wrote:
> Hi all,
> 
> I want to check performance difference by using realtime preemption patch :
> 
> http://www.kernel.org/pub/linux/kernel/projects/rt/
> 
> Please let me know from where I can download samples to test realtime
> preemption performance difference.
> 

You can obtain several -rt testcases from the RT wiki:
http://rt.wiki.kernel.org/index.php/Main_Page Here we have testcases/benchmarks
for measuring scheduling latencies, priority preemption, signaling latencies, etc
and other important information on the patchset.

Hope this helps!

> Can someone please share performance numbers for your hardware:-
> 
> 1. Interrupt latency
> 2. Task switching time
> 3. hard-realtime scheduling latency
> 
> Thank you,
> 
> Jaswinder Singh.
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-- 
Regards,
Ankita Garg (ankita@...ibm.com)
Linux Technology Center
IBM India Systems & Technology Labs, 
Bangalore, India   
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