RE: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs

2022-03-16 Thread Chen, Hongzhan via Xenomai
re is more details described in the link, please go through it. Regards Hongzhan Chen -Original Message- From: Ivan Jiang Sent: Wednesday, March 16, 2022 4:02 PM To: Chen, Hongzhan ; xenomai@xenomai.org Subject: Re: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs Dea

Re: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs

2022-03-16 Thread Jan Kiszka via Xenomai
On 15.03.22 05:01, Ivan Jiang via Xenomai wrote: > Dear Guys: > > > >    I’ve set the configs like this > >    CONFIG_NO_HZ_FULL = y > > CONFIG_RCU_NOCB_CPU=y > > CONFIG_PREEMPT=y > > CONFIG_CPU_IDLE=n > > CONFIG_ARM_CPUIDLE=n > > CONFIG_CPU_FREQ=n > > And setenv isolcpus=1

Re: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs

2022-03-16 Thread Ivan Jiang via Xenomai
- From: Ivan Jiang Sent: Wednesday, March 16, 2022 1:55 PM To: Chen, Hongzhan ; xenomai@xenomai.org Subject: Re: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs Dear Hongzhan: My kernel is 4.19.165, indeed remove xenomai, the phenomenon is

RE: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs

2022-03-16 Thread Chen, Hongzhan via Xenomai
with 4.19? Regards Hongzhan Chen -Original Message- From: Ivan Jiang Sent: Wednesday, March 16, 2022 1:55 PM To: Chen, Hongzhan ; xenomai@xenomai.org Subject: Re: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs Dear Hongzhan: My kernel is 4.19.165, indeed remo

Re: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs

2022-03-15 Thread Ivan Jiang via Xenomai
Dear Hongzhan: My kernel is 4.19.165, indeed remove xenomai, the phenomenon is the same. Maybe it’s a bug in this kernel, and how can I trace this bug if it is fixed in some patch? Thank you. Ivan 在 2022/3/16 11:30,“Chen, Hongzhan” 写入: Hi Ivan Hope that what

RE: CONFIG_NO_HZ_FULL = y but still have arch-timer on isolation CPUs

2022-03-15 Thread Chen, Hongzhan via Xenomai
Hi Ivan Hope that what discussed in https://stackoverflow.com/questions/60322119/completely-eliminating-the-timer-tick-in-modern-linux-5-0 may help you. Seems that there need do more settings for kernel parameters per your requirement but I have not tried myself. When you remove Xenomai,