On Thu, Apr 04, 2019 at 10:40:13AM +0200, Jan Kiszka via Xenomai wrote: > On 04.04.19 10:31, Philippe Gerum via Xenomai wrote: > > On 4/3/19 7:16 PM, Philippe Gerum wrote: > > > On 4/3/19 9:55 AM, Pierre FICHEUX via Xenomai wrote: > > > > Hi, > > > > > > > > Xenomai kernel (-xenomai branches) is available for BBB (AM335x) from > > > > https://github.com/beagleboard/linux for some kernel releases (4.4, 4.9, > > > > 4.14). I've tried 4.9 and 4.14 but jitter is very bad with latency tool > > > > (> > > > > 200 µs). > > > > > > > > According to Xenomai wiki, AM335x SoC is supported for "vendor branch", > > > > hope this is the same thing (?) > > > > > > > > Dos anybody use AM335x with success? I did it a long time ago with > > > > Xenomai > > > > 2 and 3.8.13 kernel. > > > > > > > > > > CONFIG_ARM_CPUIDLE hurts badly on this platform, disabling it restores > > > proper latency figures. > > > > > > A quick port of the latest I-pipe code ported to the bbb kernel 4.14 can > > > be pulled from this URL (lightly tested): > > > https://lab.xenomai.org/ipipe-rpm.git/log/?h=arm/4.14.110-bbb > > > > > > > too much haste: clone from [1], branch arm/4.14.108-bbb, which is based > > on the 4.14 branch of the Beagleboard tree (as of yesterday). > > > > [1] git://lab.xenomai.org/ipipe-rpm.git > > > > Does the BBB really still need a vendor kernel? Definitely not for booting > and core functionality. > > Jan
It should already do pretty fine with 4.4-cip, as thats what I'm doing my tests on. Greetz > > -- > Siemens AG, Corporate Technology, CT RDA IOT SES-DE > Corporate Competence Center Embedded Linux -- ——————————————— Josef Holzmayr Software Developer Embedded Systems Tel: +49 8444 9204-48 Fax: +49 8444 9204-50 R-S-I Elektrotechnik GmbH & Co. KG Woelkestrasse 11 D-85301 Schweitenkirchen www.rsi-elektrotechnik.de ——————————————— Amtsgericht Ingolstadt – GmbH: HRB 191328 – KG: HRA 170393 Geschäftsführer: Dr.-Ing. Michael Sorg, Dipl.-Ing. Franz Sorg Ust-IdNr: DE 128592548 _____________________________________________________________ Amtsgericht Ingolstadt - GmbH: HRB 191328 - KG: HRA 170363 Geschäftsführer: Dr.-Ing. Michael Sorg, Dipl.-Ing. Franz Sorg USt-IdNr.: DE 128592548
