[PATCH 0/2] Add allowed CPU capacity knowledge to EAS
From: Lukasz Luba <lukasz.luba@arm.com>
Date: 2021-06-02 13:56:39
Also in:
lkml
From: Lukasz Luba <lukasz.luba@arm.com>
Date: 2021-06-02 13:56:39
Also in:
lkml
Hi all, This is a patch set which aims to add knowledge about reduced CPU capacity into the Energy Model (EM) and Energy Aware Scheduler (EAS). Currently the issue is that SchedUtil CPU frequency and EM frequency are not aligned, when there is a CPU thermal capping. This causes an estimation error. This patch set provides the information about allowed CPU capacity into the EM (thanks to thermal pressure signal). This improves the energy estimation. More info about this mechanism can be found in the patches comments. Regards, Lukasz Lukasz Luba (2): sched/fair: Take thermal pressure into account while estimating energy sched/cpufreq: Consider reduced CPU capacity in energy calculation include/linux/energy_model.h | 16 +++++++++++++--- include/linux/sched/cpufreq.h | 2 +- kernel/sched/cpufreq_schedutil.c | 1 + kernel/sched/fair.c | 13 +++++++++++-- 4 files changed, 26 insertions(+), 6 deletions(-) -- 2.17.1