Re: [PATCH 1/2] x86: separating entry text section

[Ingo Molnar <mingo@elte.hu>]

* 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