Messages in this thread | | | From | Lukasz Luba <> | Subject | [PATCH v2 0/2] Add allowed CPU capacity knowledge to EAS | Date | Fri, 4 Jun 2021 09:09:52 +0100 |
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Hi all,
The patch set v2 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.
Changelog: v2: - clamp the returned value from effective_cpu_util() and avoid irq util scaling issues (Quentin) v1 is available at [1]
Regards, Lukasz
[1] https://lore.kernel.org/linux-pm/20210602135609.10867-1-lukasz.luba@arm.com/
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 | 19 +++++++++++++++---- 4 files changed, 30 insertions(+), 8 deletions(-)
-- 2.17.1
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