The epp_boost patch fixes an inefficiency in AMD's P-State driver where brief sleeps by a game thread (for example while waiting on the GPU) are misinterpreted as lower CPU demand, causing cores to downclock and then resume at too-low frequencies. That behavior produces momentary frame time inflation, stutters, and 1% low FPS spikes on Steam Deck and other AMD Linux systems. The patch addresses this by temporarily boosting busy cores to performance mode based on per-core activity checks. Answered
Linux kernel patch boosts Steam Deck 1% lows by 31.8% by fixing AMD CPU clock handlingThe epp_boost patch samples each core every 10 milliseconds and, if a core is at least 50% busy, temporarily switches that core to performance mode. It reverts the core back to the normal EPP policy once activity drops and remains low for 300 milliseconds. Answered
Linux kernel patch boosts Steam Deck 1% lows by 31.8% by fixing AMD CPU clock handlingThe patch checks each core every 10 milliseconds. It reverts a core back to the normal EPP policy after activity stays low for 300 milliseconds. Answered
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