RE: 2.6.33-7-rt30 and 2.6.38 comparison

Victor henri
2011-03-19T00:40:59Z

Hi

I have observed similar behavior with newer non-RT kernels but there were something strange to me ;

Same results (very few X-runs, if any) with :

-  on one hand, on an Asus laptop with a Core i3  : latency 2.3 msec
with the 2.6.33.7.2-rt kernel and 23 msec with a 2.6.37 preempt kernel;

-  on the other hand, on a Lenovo Thinkpad Core i5 : latency 2.3 msec
with the 2.6.33.7.2-rt kernel and 2.3 msec (yes the same) with a 2.6.37
preempt kernel !!

Of course the Lenovo Thinkpad is a very good laptop, but how come that there is such a big difference?

So, I have observed the same quality of performance as Madovsky but not
on every machine I've used... I don't have a clue why....

Victor

----------------------------------------
> From: infos@madovsky.org
> To: linux-rt-users@vger.kernel.org
> Subject: Re: 2.6.33-7-rt30 and 2.6.38 comparison
> Date: Fri, 18 Mar 2011 16:34:51 -0400
>
> I compiled 2.6.38 with exactly the same
> config so I made different audio/video task
> and very stable with short latency
>
>
> ----- Original Message -----
> From: "Madovsky"
> To: "linux-rt-users"
> Sent: Friday, March 18, 2011 4:28 PM
> Subject: Re: 2.6.33-7-rt30 and 2.6.38 comparison
>
>
> > not a lot, I'm only a rt user, not linux developer.
> > so my compare is only a view of for example
> > latency in audio/video....
> >
> >
> >> ----- Original Message -----
> >> From: "Ilyes Gouta"
> >> To: "Madovsky"
> >> Cc:
> >> Sent: Friday, March 18, 2011 4:16 PM
> >> Subject: Re: 2.6.33-7-rt30 and 2.6.38 comparison
> >>
> >>
> >>> Hi,
> >>>
> >>> Would you please elaborate a bit more?
> >>>
> >>> Thanks,
> >>>
> >>> -Ilyes
> >>>
> >>> On Fri, Mar 18, 2011 at 9:15 PM, Madovsky wrote:
> >>>> Just tried to compare real time app
> >>>> at work with 2.6.33.7-rt30 and 2.6.38 and
> >>>> the result is 2.6.38 is very impressive...
> >>>> --
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> >>
> >
>
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