Comment 15 for bug 2026658

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Eli (biblicabeebli) wrote :

Not to distract too much, but I have also uncovered a separate, replicable performance bug that is quite bizarre. tl;dr, though reported clock speeds are consistently higher after running `cpupower frequency-set -g performance` I see very reliable on-the-order-of-40%-ish performance loss on a particular compile task, and on that test suite I mentioned. This occurs whether thermald is installed or not, it also occurs when min_perf_pct is set to 100.

I will look into that more deeply and can create a new bug report for it - but I don't know what to label that one and would appreciate a recommendation.

I feel this current issue's name has been proven wrong, it seems clear this is a thermald Thing so I propose we rename it. (If that is an option.) The new performance weirdness is a better candidate with respect to its source closer to the kernel due to it literally being a pstate driver option - assuming I've understand what the cpupower command does.