Messages in this thread | | | Subject | Re: [PATCH v3 3/3] [RFC] CPUFreq: Add support for cpu-perf-dependencies | From | Lukasz Luba <> | Date | Mon, 16 Nov 2020 11:33:13 +0000 |
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On 11/9/20 6:57 AM, Viresh Kumar wrote: > On 06-11-20, 11:14, Lukasz Luba wrote: >> I also had similar doubts, because if we make frequency requests >> independently for each CPU, why not having N cooling devs, which >> will set independently QoS max freq for them... >> >> What convinced me: >> EAS and FIE would know the 'real' frequency of the cluster, IPA >> can use it also and have only one cooling device per cluster. >> >> We would like to keep this old style 'one cooling device per cpuset'. >> I don't have strong opinion and if it would appear that there are >> some errors in freq estimation for cluster, then maybe it does make >> more sense to have cdev per CPU... > > Let me rephrase my question. What is it that doesn't work _correctly_ > with cdev per cpufreq policy in your case? What doesn't work well if > the thermal stuff keeps looking at only the related_cpus thing and not > the cpu-perf-dependencies thing? >
We don't have a platform which would be this per-cpu freq request, yet. Thus it's hard to answer your question. The EAS would work in 'old style' - cluster mode. I don't know how IPA would work on such HW and SW configuration. To figure this out I need a real platform.
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