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hamadmarri / cacule-cpu-scheduler

The CacULE CPU scheduler is based on interactivity score mechanism. The interactivity score is inspired by the ULE scheduler (FreeBSD scheduler).
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Freeze on cachy-5.8-r7 #13

Closed raykzhao closed 3 years ago

raykzhao commented 3 years ago

Hi.

On both of my laptop and desktop machine, the cachy-5.8-r7 causes system freeze under heavy load e.g. compiling. Reverting the change of reset_lifetime at hamadmarri/linux@d45986942ebeed2a0827bbaa0edc2368611ebe4a seems to fix the problem on my system.

Not sure whether it is relevant, I am using the voluntary preemption with the autogroup enabled.

Regards, Raymond

hamadmarri commented 3 years ago

It's this line

u64 old_hrrn_x2 = life_time_x2 / se->vruntime;

Division by zero. se vruntime = 0 the time freezed

I will fix this soon. It's weird that it never happened on my machine for about 3 days.

hamadmarri commented 3 years ago

cachy-r7-fix1.zip Try this fix please

hamadmarri commented 3 years ago

https://github.com/hamadmarri/cachy-sched/blob/master/patches/v5.8/cachy-5.8-r7-fix1.patch

raykzhao commented 3 years ago

Thank you for the fix! I haven't yet encountered any freezes so far after applying cachy-5.8-r7-fix1.

hamadmarri commented 3 years ago

Hi @raykzhao ,

Please reopen the issue if something wrong happened again with r7.

Thank you