[lkml]   [2020]   [Aug]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC PATCH] arm64: defconfig: Disable fine-grained task level IRQ time accounting
Vladimir Oltean <> writes:
>> 1) When irq accounting is disabled, RT throttling kicks in as
>> expected.
>> 2) With irq accounting the RT throttler does not kick in and the RCU
>> stall/lockups happen.
>> Not much, but there is clearly interaction between irq time accounting
>> and scheduler accounting.
>> Can you please reduce /proc/sys/kernel/sched_rt_runtime_us in steps of
>> 50000? At least in theory, reduction should bring the throttling back.
> We already know from my original report that reducing
> sched_rt_runtime_us to 80% (800000) gives us a stable system.

Oh. Somehow missed that. Btw, can you please use links in the form of:$MSGID is spotty and having the message id allows to search in the
mail client as well.

> What is this telling us?

It seems that the fine grained irq time accounting affects the runtime
accounting in some way which I haven't figured out yet.



 \ /
  Last update: 2020-08-03 17:14    [W:0.067 / U:0.560 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site