quikcjack！ Oh, thanks! I will try to get it later. I had allways use email to read this board, since I am form mainland China and can't access this board form web page. :-( Any way, thansk for your work and help.
======== 2014-04-04 23:08:32 您在来信中写道： ======== Sorry for my late answer. I have posted my kernel configuration on March 5. Please take a close look at my postings. You mave have to log in to google to see the attachments. Am Mittwoch, 19. März 2014 16:06:07 UTC+1 schrieb winglion: hi,quikcjack. I had been fallowing the topic for some dates. I plan to build a CNC controler with BBBlack. I want to get your kernel config to make a PREEMPT/PREEMPT_RT capable kernel too. whould you please seem me your kernel confiuration too? Thanks. ======== 2014-03-19 16:47:58 ： ======== It's really nice to see that there is some interest in having a PREEMPT/PREEMPT_RT capable kernel for the BBB. Well, it's relatively easy to compile a kernel. If you want to develop applications for the BBB you need a compiler/toolchain. So I guess you might have that already. The instructions to compile a kernel are explained at https://github.com/beagleboard/kernel/tree/3.8. I could send you my modified kernel configuration. You simply have the replace the original kernel configuration to create the PREEMPT capable kernel. Am Freitag, 14. März 2014 13:03:51 UTC+1 schrieb [email protected]: Hi thats great! Is that possible to have your compiled kernel for BBB? I would avoid the compiling process. Thanks a lot, Morteza Am Mittwoch, 26. Februar 2014 14:53:05 UTC+1 schrieb [email protected]: I have recently tested kernel 3.8.13-rt9 (https://github.com/beagleboard/kernel/tree/3.8-rt) using git://git.kernel.org/pub/scm/linux/kernel/git/clrkwllms/rt-tests.git. I am using Ubuntu 12.04.4. The load was created using stress –cpu 1 which generates a cpu load of about 100%. I then used cyclictest: root@ubuntu-armhf:/home/ubuntu/rt-tests# ./cyclictest -l1000000 -m -n -t1 -p99 -i400 -q # /dev/cpu_dma_latency set to 0us T: 0 ( 770) P:99 I:400 C:1000000 Min: 14 Act: 19 Avg: 18 Max: 132 uname -a reports: root@ubuntu-armhf:/home/ubuntu/rt-tests# uname -a Linux ubuntu-armhf 3.8.13-rt9-00899-g160e771 #1 SMP PREEMPT Wed Jun 19 10:49:36 CEST 2013 armv7l armv7l armv7l GNU/Linux I am absolutely surprised that the result is looking that good. Am Freitag, 21. Februar 2014 09:20:39 UTC+1 schrieb [email protected]: I am trying to figure out how to create a kernel for the BBB that supports PREEMPT_RT. It's kind of strange that the BBB's default kernel does not even have PREEMPT activated. Such a board doesn't fit to many embedded applications where we need at least some kind of determinism. It is even worse, that nobody seems to care about this problem. Contrary to that, the Raspberry PI's standard kernel has PREEMPT activacted from the very beginning. I have tested Robert Nelsons kernel 3.8.13-r9 (https://github.com/beagleboard/kernel/tree/3.8-rt). It does not have PREEMPT_RT activated by default. When doing so, it does not boot. But activating PREEMPT does work. However, development of this branch has stopped several months ago. The official source for RT Linux (3.8.13) has evolved since then. Meanwhile there's an rt17 patch set (https://www.kernel.org/pub/linux/kernel/projects/rt/3.8/). Did anybody give this a try? Does it work with the BBB? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. 在此邮件中未发现病毒。 检查工具：AVG - www.avg.com 版本：2013.0.3462 / 病毒数据库：3722/7208 - 发布日期：03/17/14 = = = = = = = = = = = = = = = = = = = = = = 致 礼！ winglion [email protected] 2014-03-19 -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. = = = = = = = = = = = = = = = = = = = = = = 致 礼！ Yang [email protected] 2014-07-01 -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
