On Thu, Feb 20, 2020 at 09:56:34AM +0000, Lukasz Luba wrote: > Hi all, > > This is just a resend, now with proper v2 in the patches subject. > > The Odroid-XU4/3 is a decent and easy accessible ARM big.LITTLE platform, > which might be used for research and development. > > This small patch set provides possibility to run Energy Aware Scheduler (EAS) > on Odroid-XU4/3 and experiment with it. > > The patch 1/2 provides 'dynamic-power-coefficient' in CPU DT nodes, which is > then used by the Energy Model (EM). > The patch 2/2 enables SCHED_MC (which adds another level in scheduling domains) > and enables EM making EAS possible to run (when schedutil is set as a CPUFreq > governor). > > 1. Test results > > Two types of different tests have been executed. The first is energy test > case showing impact on energy consumption of this patch set. It is using a > synthetic set of tasks (rt-app based). The second is the performance test > case which is using hackbench (less time to complete is better). > In both tests schedutil has been used as cpufreq governor. In all tests > PROVE_LOCKING has not been compiled into the kernels. > > 1.1 Energy test case > > 10 iterations of 24 periodic rt-app tasks (16ms period, 10% duty-cycle) > with energy measurement. The cpufreq governor - schedutil. Unit is Joules. > The energy is calculated based on hwmon0 and hwmon3 power1_input. > The goal is to save energy, lower is better. > > +-----------+-----------------+------------------------+ > | | Without patches | With patches | > +-----------+--------+--------+----------------+-------+ > | benchmark | Mean | RSD* | Mean | RSD* | > +-----------+--------+--------+----------------+-------+ > | 24 rt-app | 21.56 | 1.37% | 19.85 (-9.2%) | 0.92% | > | tasks | | | | | > +-----------+--------+--------+----------------+-------+ > > 1.2 Performance test case > > 10 consecutive iterations of hackbench (hackbench -l 500 -s 4096), > no delay between two successive executions. > The cpufreq governor - schedutil. Units in seconds. > The goal is to see not regression, lower completion time is better. > > +-----------+-----------------+------------------------+ > | | Without patches | With patches | > +-----------+--------+--------+----------------+-------+ > | benchmark | Mean | RSD* | Mean | RSD* | > +-----------+--------+--------+----------------+-------+ > | hackbench | 8.15 | 2.86% | 7.95 (-2.5%) | 0.60% | > +-----------+--------+--------+----------------+-------+ > > *RSD: Relative Standard Deviation (std dev / mean) Nice measurements! Applied both, thank you. Best regards, Krzysztof
