Date: Tue, 8 Mar 2011 17:15:24 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>,
        =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker <fweisbec@gmail.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        masami.hiramatsu.pt@hitachi.com, hpa@zytor.com, ananth@in.ibm.com,
        davem@davemloft.net, linux-kernel@vger.kernel.org, tglx@linutronix.de,
        eric.dumazet@gmail.com, 2nddept-manager@sdl.hitachi.co.jp
Subject: Re: [PATCH 1/2] x86: separating entry text section
Message-ID: <20110308161524.GE1751@elte.hu>
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* Jiri Olsa <jolsa@redhat.com> wrote:

> On Mon, Mar 07, 2011 at 04:29:21PM +0100, Ingo Molnar wrote:
> > 
> > * Jiri Olsa <jolsa@redhat.com> wrote:
> > 
> > > hi,
> > > any feedback?
> > 
> > Did you get my reply below?
> > 
> > Thanks,
> > 
> > 	Ingo
> > 
> 
> hi,
> 
> strange, I believe I did reply on this.. got missed
> somehow or I'm missing simething :) reattached..

hm, the direct mail to me got lost, but i found your reply in the lkml folder. 
That's how i missed your reply.

> I made another test with "reseting" the system state as suggested and only for 
> cache-misses together with instructions and cycles events.
> 
> I can see even bigger drop of icache load misses than before
> from 19359739 to 16448709 (about 15%).
> 
> The instruction/cycles count is slightly bigger in the patched
> kernel run though..

Ok, elapsed time is more stable, it went from:

>         0.205402048  seconds time elapsed   ( +-   0.299% )
>         0.206267711  seconds time elapsed   ( +-   0.138% )

to:

>         0.206072845  seconds time elapsed   ( +-   0.276% )
>         0.206747566  seconds time elapsed   ( +-   0.137% )

which is 0.1% slower, within the noise of the measurement.

Will apply the patches, thanks Jiri!

Thanks,

	Ingo
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