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authorDmitry Baryshkov <[email protected]>2022-03-15 17:11:04 +0300
committerBjorn Andersson <[email protected]>2022-04-12 09:21:16 -0500
commit0e0a8e35d72533b3eef3365e900baacd7cede8e2 (patch)
treedd7cd4bc480b123def8f42880d4062efbbd46d78 /tools/perf/scripts/python/syscall-counts-by-pid.py
parent6127d8e4cd096c4f5c8590617e22a2fdc80aee30 (diff)
arm64: dts: qcom: sdm845: correct dynamic power coefficients
Following sm8150/sm8250 update sdm845 capacity-dmips-mhz and dynamic-power-coefficient based on the measurements [1], [2]. The energy model dynamic-power-coefficient values were calculated with DPC = µW / MHz / V^2 for each OPP, and averaged across all OPPs within each cluster for the final coefficient. Voltages were obtained from the qcom-cpufreq-hw driver that reads voltages from the OSM LUT programmed into the SoC. Normalized DMIPS/MHz capacity scale values for each CPU were calculated from CoreMarks/MHz (CoreMark iterations per second per MHz), which serves the same purpose. For each CPU, the final capacity-dmips-mhz value is the C/MHz value of its maximum frequency normalized to SCHED_CAPACITY_SCALE (1024) for the fastest CPU in the system. For more details on measurement process see the commit message for the commit 6aabed5526ee ("arm64: dts: qcom: sm8250: Add CPU capacities and energy model"). [1] https://github.com/kdrag0n/freqbench [2] https://github.com/kdrag0n/freqbench/tree/master/results/sdm845/main Cc: Danny Lin <[email protected]> Signed-off-by: Dmitry Baryshkov <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]> Link: https://lore.kernel.org/r/[email protected]
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