Messages in this thread | | | Date | Tue, 7 Nov 2023 11:45:21 +0000 | From | Sudeep Holla <> | Subject | Re: [PATCH v5 1/7] topology: Add a new arch_scale_freq_reference |
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On Sat, Nov 04, 2023 at 11:59:01AM +0100, Vincent Guittot wrote: > Create a new method to get a unique and fixed max frequency. Currently > cpuinfo.max_freq or the highest (or last) state of performance domain are > used as the max frequency when computing the frequency for a level of > utilization but: > - cpuinfo_max_freq can change at runtime. boost is one example of > such change. > - cpuinfo.max_freq and last item of the PD can be different leading to > different results between cpufreq and energy model. > > We need to save the reference frequency that has been used when computing > the CPUs capacity and use this fixed and coherent value to convert between > frequency and CPU's capacity. > > In fact, we already save the frequency that has been used when computing > the capacity of each CPU. We extend the precision to save kHz instead of > MHz currently and we modify the type to be aligned with other variables > used when converting frequency to capacity and the other way. >
For all the topology related changes here and patch 6/7 and 7/7:
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
-- Regards, Sudeep
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