From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 15 Oct 2010 15:13:23 +0100 (BST) From: edward.robbins@domain.hid MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_20101015151323000000_34691" In-Reply-To: <4CB85C64.9040307@domain.hid> References: <1281709057.650414331@domain.hid> <4C65583D.3030800@domain.hid> <1281960823.030215299@domain.hid> <4C692FC3.5040802@domain.hid> <1283531433.789315367@domain.hid> <1283590285.1709.2153.camel@domain.hid> <1287134519.029617765@domain.hid> <1287143691.028416668@domain.hid> <4CB85C64.9040307@domain.hid> Message-ID: <1287152003.579923730@domain.hid> Subject: Re: [Xenomai-help] Very high latencies under stress testing List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: xenomai@xenomai.org ------=_20101015151323000000_34691 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Will do. Should I leave in Philippes patch? I will assume no for now...=0A= =0AOn Friday, 15 October, 2010 2:51pm, "Gilles Chanteperdrix" said:=0A=0A> edward.robbins@domain.hid = wrote:=0A> > I am also finding that tasks are frequently hanging, causing= =0A> > ipipetraces with "INFO: task xxx:xxx blocked for more than 120=0A> >= seconds". Ihave just had this with apt-get update, and was previously=0A> = > getting itwith grub-install. Could this be related?=0A> =0A> Yes. There i= s obviously an issue in your patched kernel, we need to find=0A> this first= before we draw any conclusion from any other behaviour.=0A> =0A> From the = trace you sent, it looks like it happens in the MTRR code, but=0A> it could= also be an SMI, or some other bug. For debugging purposes,=0A> could you t= ry disabling MTRRs in the kernel configuration?=0A> =0A> --=0A> =09=09=09= =09=09 Gilles.=0A> =0A ------=_20101015151323000000_34691 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Will do. Should I leave in Philippes patch?= I will assume no for now...

On Friday, 15 October, 2010 2:51pm, "Gi= lles Chanteperdrix" <gilles.chanteperdrix@xenomai.org> said:

&= gt; edward.robbins@domain.hid wrote:
> > I am also f= inding that tasks are frequently hanging, causing
> > ipipetraces = with "INFO: task xxx:xxx blocked for more than 120
> > seconds". I= have just had this with apt-get update, and was previously
> > get= ting itwith grub-install. Could this be related?
>
> Yes. Ther= e is obviously an issue in your patched kernel, we need to find
> thi= s first before we draw any conclusion from any other behaviour.
> > From the trace you sent, it looks like it happens in the MTRR code, b= ut
> it could also be an SMI, or some other bug. For debugging purpos= es,
> could you try disabling MTRRs in the kernel configuration?
&= gt;
> --
> =09=09=09=09=09 Gilles.
>
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