From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <50C61DF3.8030703@xenomai.org> Date: Mon, 10 Dec 2012 18:37:55 +0100 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <50C1EF04.1090506@wanadoo.fr> <50C236B9.3030507@xenomai.org> <50C4EF5A.3030502@wanadoo.fr> <50C524A6.6020006@xenomai.org> <50C5F784.6040801@wanadoo.fr> <50C6076F.7050505@xenomai.org> <50C60E6A.1080307@wanadoo.fr> In-Reply-To: <50C60E6A.1080307@wanadoo.fr> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Subject: Re: [Xenomai] iMX6q 1Hz tick List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Thierry Bultel Cc: xenomai@xenomai.org On 12/10/2012 05:31 PM, Thierry Bultel wrote: > Le 10/12/2012 17:01, Gilles Chanteperdrix a écrit : >> On 12/10/2012 03:53 PM, Thierry Bultel wrote: >>> Le 10/12/2012 00:54, Gilles Chanteperdrix a écrit : >>>> On 12/09/2012 09:06 PM, Thierry Bultel wrote: >>>> >>>>> Le 07/12/2012 19:34, Gilles Chanteperdrix a écrit : >>>>>> On 12/07/2012 02:28 PM, Thierry Bultel wrote: >>>>>> >>>>>>> Hi, >>>>> >>>>> Hello Gilles, >>>>> >>>>>>> >>>>>>> I have "successfully" patched a 3.0.35 kernel from Freescale with >>>>>>> adeos-ipipe-3.0.36-1.18.11 >>>>>>> >>>>>>> I have -not- applied the adeos-ipipe-3.0.36-arm-1.18-11-pre.patch >>>>>>> that showed too much "revert patch detected" errors. >>>>>> >>>>>> >>>>>> >>>>>> The patch should apply cleanly, the question, if you get too many >>>>>> rejections, it is because you do not apply it to the proper branch. >>>>>> >>>>> >>>>> Of course it was not. >>>>> I started with a kernel provided by the module manufacturer. I estimate >>>>> that this kernel is "almost" a rel_imx_3.0.35_12.09.02, I mean, that >>>>> I have not found a closer tag than this one. >>>>> >>>>> My first idea was to attempt to apply the patches to that kernel >>>>> directly. I was not expecting it would have been simple, and it was >>>>> actually not. But after a few hours I came to the initial result I said. >>>>> >>>>> >>>>> >>>>>>> >>>>>>> BTW, I have understand that its purpose was mainly to upgrade to 3.0.36, >>>>>>> but what is actually the role of the >>>>>>> adeos-ipipe-3.0.36-arm-1.18-11-post.patch ? (I applied it). >>>>>> >>>>>> >>>>>> I have explained this in a previous mail. >>>>> >>>>> Ok, I will seek in the history. I would be nice if the explanation >>>>> was in the README. >>>>> >>>>>> >>>>>>> >>>>>>> I had to deal with some rejections but at least the kernel is booting >>>>>>> and my application running. >>>>>>> >>>>>>> But the target is very slow, and /proc/xenomai/irq shows that the >>>>>>> [timer] irq only comes about every 1 second. >>>>>>> >>>>>>> The /proc/interrupts shows an IRQ every 10ms, which was expected >>>>>>> since I have CONFIG_HZ=100 >>>>>>> >>>>>>> I am pretty sure that I messed up something in the patch process, >>>>>>> however I do not know where to start to look for. >>>>>> >>>>>> >>>>>> Apply the patches to the proper imx release, and everything should be fine. >>>>> >>>>> >>>>> That is what I did, at last. >>>>> To do so, I have extracted the BSP from the given 'almost' >>>>> rel_imx_3.0.35_12.09.02 kernel, >>>>> taken the rel_imx_3.0.15_12.03.00, applied the patches, >>>>> and brought back the BSP to the patched kernel. >>>> >>> >>> The issues I mentionned are not also present with CONFIG_IPIPE=no, >>> so it is just that the 3.0.15 kernel does not have everything for my board. >>> >>>> >>>> I would do what you want to do with git. Checkout the ipipe-3.0-imx6q >>>> branch from the ipipe-gch.git, then merge it with the vendor branch you >>>> want to use. >>>> >>> >>> Sure it would work and would be fine with git. >>> But unfortunalely I do not have access to the repository of the vendor, >>> but only to a bz2 snapshot of their kernel. >>> >>> I wonder if the right method would be to use git to merge Ipipe to the >>> 3.0.35_12_09.02, and then bring back the BSP that I have isolated as a patch >> >> Yes, if the vendor BSP is based on 3.0.35_12_09.02, you should make a >> diff with that, and try and merge it with the ipipe-3.0-imx6q branch. >> > > > Done. And success. Thanks. I am running your 3.0.43 kernel with my BSP. > no more network or reboot slowness issues. > > However, htop it saying that CPU0 is at 20% and CPU3 at 12%, > no application is running. The only thing that I see running is the > timer interrupt. > > Also, I still have > 87: 13 0 0 0 GIC i.MX Timer Tick > > .. the counter increases very slowly, about 1 every 10 minutes maybe. > > That does not happen with CONFIG_IPIPE=no Do you have CONFIG_LOCALTIMER (and CONFIG_SMP) enabled? -- Gilles.