From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <534DB1C7.4060905@xenomai.org> Date: Wed, 16 Apr 2014 00:25:11 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 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> <1397599195.2652.0.camel@localhost.localdomain> In-Reply-To: <1397599195.2652.0.camel@localhost.localdomain> Content-Type: text/plain; charset=UTF-8 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: Peter Howard Cc: xenomai@xenomai.org On 04/15/2014 11:59 PM, Peter Howard wrote: > 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 . . . > Could you turn CONFIG_ARM_FCSE_MESSAGES on and show us the messages you get (with the 3.14 kernel, not the master branch)? -- Gilles.