Messages in this thread | | | Subject | Re: [PATCH v4 1/6] x86,sched: Add support for frequency invariance | From | Giovanni Gherdovich <> | Date | Mon, 25 Nov 2019 17:06:01 +0100 |
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On Sat, 2019-11-23 at 23:49 -0800, Doug Smythies wrote: > ... > Kernel 5.4-rc8 + revert, intel_cpufreq/schedutil: 3899 seconds > Kernel 5.4-rc8 + gg 6 + revert, intel_cpufreq/schedutil: 2740.7 seconds > Ratio: 0.70 (as expected) > Kernel 5.4-rc8, intel_cpufreq/schedutil: 2334.7 seconds (faster than expected) > Kernel 5.4-rc8 + gg 6 patch set, intel_cpufreq/schedutil: 2275.0 seconds (faster than expected) > Ratio: 0.97 (not as expected) > Kernel 5.4-rc8, intel_cpufreq/performance: 2215.3 seconds > Kernel 5.4-rc8, intel_cpufreq/ondemand: 3286.3 seconds > Re-stated from previous e-mail: > Kernel 5.3-rc8, intel_cpufreq/schedutil: ratio: 0.69 (I don't have the original times)
Hello Doug,
schedutil in 5.4 going a lot faster than in 5.3 would be a surprise. I'm running that same test too to check if I can see it as well.
Besides, as it's already been said this patchset adds frequency scale-invariance to scheduler metrics such as load and utilization and that's useful also in areas other than frequency scaling (most notably the scheduler load balancer).
Thanks, Giovanni
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