From mboxrd@z Thu Jan 1 00:00:00 1970 From: Philippe Gerum In-Reply-To: <1287152003.579923730@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> <1287152003.579923730@domain.hid> Content-Type: text/plain; charset="UTF-8" Date: Fri, 15 Oct 2010 16:33:44 +0200 Message-ID: <1287153224.1628.80.camel@domain.hid> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit 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: edward.robbins@domain.hid Cc: xenomai@xenomai.org On Fri, 2010-10-15 at 15:13 +0100, edward.robbins@domain.hid wrote: > Will do. Should I leave in Philippes patch? I will assume no for > now... > That patch is correct and unrelated to the next problem. An other issue is that the generic mtrr code is not ipipe aware, so it is not really interrupt free. > On Friday, 15 October, 2010 2:51pm, "Gilles Chanteperdrix" > said: > > > edward.robbins@domain.hid wrote: > > > I am also finding that tasks are frequently hanging, causing > > > ipipetraces with "INFO: task xxx:xxx blocked for more than 120 > > > seconds". Ihave just had this with apt-get update, and was > previously > > > getting itwith grub-install. Could this be related? > > > > Yes. There is obviously an issue in your patched kernel, we need to > find > > this first before we draw any conclusion from any other behaviour. > > > > From the trace you sent, it looks like it happens in the MTRR code, > but > > it could also be an SMI, or some other bug. For debugging purposes, > > could you try disabling MTRRs in the kernel configuration? > > > > -- > > Gilles. > > > _______________________________________________ > Xenomai-help mailing list > Xenomai-help@domain.hid > https://mail.gna.org/listinfo/xenomai-help -- Philippe.