From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <52CCCE4F.4050304@steinkuehler.net> Date: Tue, 07 Jan 2014 22:04:31 -0600 From: Charles Steinkuehler MIME-Version: 1.0 References: <44lhyrmuw9.fsf@be-well.ilk.org> <52CC7D71.4040703@steinkuehler.net> <52CC83F1.40000@xenomai.org> <52CC85C5.4060703@steinkuehler.net> <52CC8A18.2020807@xenomai.org> <52CCA101.2040604@steinkuehler.net> In-Reply-To: <52CCA101.2040604@steinkuehler.net> Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Subject: Re: [Xenomai] Altera Cyclone V 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 1/7/2014 6:51 PM, Charles Steinkuehler wrote: > = > Thanks for the details! My to-do list just got longer... :) > = > I'll do some testing (on the BeagleBone) and post the results, but it > might take a couple of days. I did a quick check with the BeagleBone kernels I've already built (no IPipe debugging) and I'm getting much better results than the last time I tested. Typical latency is around 20 uS, and worst case is about 45 uS (although I obviously didn't run overnight!). I've got about half of the suggested kernel settings "correct" already, but the others need to be tweaked (including disabling SMP, thanks for the hint!). I tried using all the recommended settings, but the kernel build failed when linking: LD init/built-in.o arch/arm/kernel/built-in.o: In function `__irq_usr': :(.kprobes.text+0x3c2): relocation truncated to fit: R_ARM_THM_JUMP19 against symbol `__ipipe_ret_to_user_irqs_disabled' defined in .text section in arch/arm/kernel/built-in.o arch/arm/kernel/built-in.o: In function `ret_from_exception': :(.kprobes.text+0x600): relocation truncated to fit: R_ARM_THM_JUMP19 against symbol `__ipipe_ret_to_user_irqs_disabled' defined in .text section in arch/arm/kernel/built-in.o make: *** [vmlinux] Error 1 The link error goes away if I disable CONFIG_THUMB2_KERNEL, which wasn't set in the original kernel config. I'll report details when I get some debug kernels tested and capture the requested data. -- = Charles Steinkuehler charles@steinkuehler.net -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 261 bytes Desc: OpenPGP digital signature URL: