Messages in this thread | | | Subject | Re: WARNING: CPU: 112 PID: 2041 at kernel/sched/sched.h:1453 | From | Dietmar Eggemann <> | Date | Thu, 29 Jul 2021 16:38:10 +0200 |
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On 29/07/2021 14:36, Bruno Goncalves wrote: > On Wed, Jul 28, 2021 at 5:55 PM Dietmar Eggemann > <dietmar.eggemann@arm.com> wrote: >> >> On 28/07/2021 15:11, Bruno Goncalves wrote:
[...]
>> Can't reproduce it on my Juno (arm64) (slow-switching (scpi-cpufreq >> driver)). > > We seem to be able to reproduce this only on Ampere Altra machines, > specifically on mtjade and mtsnow cpus. > > # cpupower frequency-info > analyzing CPU 0: > driver: cppc_cpufreq > CPUs which run at the same hardware frequency: 0 > CPUs which need to have their frequency coordinated by software: 0 > maximum transition latency: Cannot determine or is not supported. > hardware limits: 1000 MHz - 2.80 GHz > available cpufreq governors: conservative ondemand userspace > powersave performance schedutil > current policy: frequency should be within 2.00 GHz and 2.80 GHz. > The governor "schedutil" may decide which speed to use > within this range. > current CPU frequency: 1.55 GHz (asserted by call to hardware) > > # ps -eTo comm,pid,pri,class | grep sugov > sugov:0 1082 140 DLN > sugov:1 1085 140 DLN > ... > sugov:78 1319 140 DLN > sugov:79 1320 140 DLN
Thanks! In the meantime I got access to an Ampere Altra so I can try 5.14.0-rc1 later today.
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