Re: WARNING: CPU: 112 PID: 2041 at kernel/sched/sched.h:1453
From: Dietmar Eggemann <dietmar.eggemann@arm.com>
Date: 2021-07-29 14:38:30
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On 29/07/2021 14:36, Bruno Goncalves wrote:
On Wed, Jul 28, 2021 at 5:55 PM Dietmar Eggemann [off-list ref] wrote:quoted
On 28/07/2021 15:11, Bruno Goncalves wrote:
[...]
quoted
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. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel