From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <1397599195.2652.0.camel@localhost.localdomain> From: Peter Howard Date: Wed, 16 Apr 2014 07:59:55 +1000 In-Reply-To: <534D19FA.3040506@xenomai.org> References: <1396407588.27578.5.camel@localhost.localdomain> <533BBB11.5090808@xenomai.org> <1396848843.2481.15.camel@localhost.localdomain> <5343BEFB.7050402@xenomai.org> <1396999856.2660.7.camel@localhost.localdomain> <53449244.8040502@xenomai.org> <1397003664.2660.14.camel@localhost.localdomain> <1397017658.2660.16.camel@localhost.localdomain> <534534FD.5090805@xenomai.org> <1397113300.2720.5.camel@localhost.localdomain> <5346895B.6080401@xenomai.org> <1397159850.2881.3.camel@localhost.localdomain> <53471389.6000000@xenomai.org> <1397168263.6356.11.camel@localhost.localdomain> <534719F5.2020605@xenomai.org> <1397169248.6356.15.camel@localhost.localdomain> <53471FDB.50008@xenomai.org> <1397170339.6356.17.camel@localhost.localdomain> <1397541812.6541.3.camel@localhost.localdomain> <534D19FA.3040506@xenomai.org> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] OMAP L138 List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: xenomai@xenomai.org On Tue, 2014-04-15 at 13:37 +0200, Gilles Chanteperdrix wrote: > On 04/15/2014 08:03 AM, Peter Howard wrote: > > On Fri, 2014-04-11 at 08:52 +1000, Peter Howard wrote: > >> On Fri, 2014-04-11 at 00:48 +0200, Gilles Chanteperdrix wrote: > >>> On 04/11/2014 12:34 AM, Peter Howard wrote: > >>>> On Fri, 2014-04-11 at 00:23 +0200, Gilles Chanteperdrix wrote: > >>>> (Stripping back conversation on this one - apologies if that's bad > >>>> etiquette for this list) > >>>> > >>>>> Attachment is better. Also please post the changes you made for omapL138 > >>>>> > >>>> > >>>> diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig > >>>> index a075b3e..3d8bc59 100644 > >>>> --- a/arch/arm/mach-davinci/Kconfig > >>>> +++ b/arch/arm/mach-davinci/Kconfig > >>>> @@ -41,6 +41,8 @@ config ARCH_DAVINCI_DA850 > >>>> select ARCH_DAVINCI_DA8XX > >>>> select ARCH_HAS_CPUFREQ > >>>> select CP_INTC > >>>> + select IPIPE_ARM_KUSER_TSC if IPIPE > >>>> + select ARM_FCSE if IPIPE > >>> > >>> You may want to leave the choice of enabling or disabling FCSE to the user. > >>> > >> > >> Understood; at the moment the variance on max latency is really bad if > >> you don't enable FCSE. When I sort out the crashing issues I'll re-test > >> with it off. > > > > Well, FCSE turned out to be my problem. > > > > More specifically, FCSE and ARM_FCSE_BEST_EFFORT. Either a) disabling > > ARM_FCSE altogether, or b) selecting ARM_FCSE with ARM_FCSE_GUARENTEED > > gets rid of the crashes/panics with ipipe latency tracing enabled. > > > > So now things seem reasonably stable, I'll go through the full set of > > tests. Though I still can't do 'xeno-test -l "dohell -l /opt/ltp"' as > > ltp takes out the system without any ipipe/xenomai bits. > > > Ok, FCSE best effort is currently being validated on 3.14, so it may > well be broken. After all, the raw/* branches are work in progress. > Note: selecting ARM_FCSE_BEST_EFFORT produces the same result on the master branch too . . . -- Peter Howard