linux-kernel - Re: Improved UDP performance using 2.6.21-rc5-rt10

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Message-ID: <20070403212611.GC28093@elte.hu>
Date:	Tue, 3 Apr 2007 23:26:11 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"dave_sperry@...e.org" <dasperry@...cast.net>
Cc:	David Sperry <dave_sperry@...e.org>,
	linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Improved UDP performance using 2.6.21-rc5-rt10


* dave_sperry@...e.org <dasperry@...cast.net> wrote:

> rt10 shows a big improvement over rt8
> 
> ##################################################
> etup                    Thruput      CPU% 
> Nvidia
> 2.6.21-rc5-rt8           938          65%
>    netperf @51
>    hardirq @50
>    softirq @50
> 
> Nvidia
> 2.6.21-rc5-rt10           938          32%
>    netperf @51
>    hardirq @50
>    softirq @50

cool! Btw., could you run the same but without running cyclesoak, and 
only watching the 'idle' metric in 'top' or vmstat? I found in my 
experiments that cyclesoak sometimes interfers with the workload - and 
the idle stats are precise and accurate on -rt. (they are not on 
vanilla)

	Ingo
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