On Fri 2016-11-18 @ 11:25:26 AM, Oussama Ghorbel wrote: > I have written recently a patch that solve the FIQ issue with RT > Preempt on the 4-core Raspberry Pi board. > Please see this article for full description on the solution. > https://www.osadl.org/Single-View.111+M5c03315dc57.0.html This is excellent, thank you very much! Previously my raspi2/3 systems were barely able to survive 15 minutes of either "stress" or "cyclictest", but by simply adding the two kernel cmdline options I've now been running: $ stress --cpu 5 --io 4 --vm 2 --vm-bytes 128M& $ cyclictest -p 80 -t5 -n on a raspi3 for over 10 hours. The latest cyclictest numbers are: policy: fifo: loadavg: 11.72 11.87 11.85 9/180 3097 T: 0 ( 525) P:80 I:1000 C:37527692 Min: 12 Act: 21 Avg: 25 Max: 725 T: 1 ( 526) P:80 I:1500 C:25018460 Min: 13 Act: 20 Avg: 23 Max: 540 T: 2 ( 527) P:80 I:2000 C:18763840 Min: 13 Act: 23 Avg: 24 Max: 914 T: 3 ( 528) P:80 I:2500 C:15011069 Min: 14 Act: 19 Avg: 26 Max: 514 T: 4 ( 529) P:80 I:3000 C:12509225 Min: 14 Act: 19 Avg: 24 Max: 568 This is running the 4.4.35 linux-raspberrypi kernel from git://github.com/raspberrypi/linux.git with patch-4.4.32-rt43.patch.xz applied (only one small hunk had to be removed from the Makefile patch in order for it to apply cleanly). $ uname -a Linux raspberrypi3 4.4.35-rt43-yocto-standard #1 SMP PREEMPT RT Tue Nov 29 15:16:27 EST 2016 armv7l armv7l armv7l GNU/Linux Best regards, Trevor -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
