From mboxrd@z Thu Jan 1 00:00:00 1970 From: Victor henri Subject: RE: 2.6.33-7-rt30 and 2.6.38 comparison Date: Sat, 19 Mar 2011 01:40:58 +0100 Message-ID: References: <76D8B96C9CCF479A864872F2092B0C8F@e1705> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE To: linux-rt-users Return-path: Received: from snt0-omc1-s4.snt0.hotmail.com ([65.55.90.15]:38133 "EHLO snt0-omc1-s4.snt0.hotmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932622Ab1CSAk7 convert rfc822-to-8bit (ORCPT ); Fri, 18 Mar 2011 20:40:59 -0400 In-Reply-To: <76D8B96C9CCF479A864872F2092B0C8F@e1705> Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hi I have observed similar behavior with newer non-RT kernels but there we= re something strange to me ;=20 Same results (very few X-runs, if any) with : =A0=A0 -=A0 on one hand, on an Asus laptop with a Core i3=A0 : latency 2.3 ms= ec=20 with the 2.6.33.7.2-rt kernel and 23 msec with a 2.6.37 preempt kernel; =A0=A0=A0 -=A0 on the other hand, on a Lenovo Thinkpad Core i5 : latency 2.3 ms= ec=20 with the 2.6.33.7.2-rt kernel and 2.3 msec (yes the same) with a 2.6.37= =20 preempt kernel !! Of course the Lenovo Thinkpad is a very good laptop, but how come that = there is such a big difference?=20 So, I have observed the same quality of performance as Madovsky but not= =20 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"=20 > To: "linux-rt-users"=20 > 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"=20 > >> To: "Madovsky"=20 > >> Cc:=20 > >> 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... > >>>> -- > >>>> To unsubscribe from this list: send the line "unsubscribe > >>>> linux-rt-users" in > >>>> the body of a message to majordomo@vger.kernel.org > >>>> More majordomo info at http://vger.kernel.org/majordomo-info.htm= l > >>>> > >>> -- > >>> To unsubscribe from this list: send the line "unsubscribe > >>> linux-rt-users" in > >>> the body of a message to majordomo@vger.kernel.org > >>> More majordomo info at http://vger.kernel.org/majordomo-info.html > >> > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rt-us= ers" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rt-user= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html