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An Early Look At The AMD P-State CPPC Driver Performance vs. ACPI CPUFreq

Submitted by Rianne Schestowitz on Wednesday 22nd of September 2021 02:42:36 PM Filed under
Graphics/Benchmarks

Earlier this month AMD posted their initial public patches for the AMD P-State CPU frequency scaling driver that leverages ACPI CPPC for ultimately aiming to provide better power efficiency and more responsive CPU frequency scaling / performance state decisions on Zen 3 (and Zen 2 eventually) processors. This is part of the effort around AMD and Valve collaborating for better Linux efficiency especially with the AMD-powered Steam Deck.

This amd_pstate driver remains a work-in-progress and so far was just sent out in initial patch form earlier this month and not yet queued up for mainlining, etc. It will likely take a few rounds of review before being merged especially with not all Zen 2/3 CPUs/APUs are yet supported among other items still settling with this new driver.

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