Messages in this thread | | | Date | Thu, 24 Jan 2019 16:05:18 +0000 | From | Patrick Bellasi <> | Subject | Re: [PATCH v6 09/16] sched/cpufreq: uclamp: Add utilization clamping for RT tasks |
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On 24-Jan 16:15, Peter Zijlstra wrote: > On Tue, Jan 15, 2019 at 10:15:06AM +0000, Patrick Bellasi wrote: > > Add uclamp_default_perf, a special set of clamp values to be used > > for tasks requiring maximum performance, i.e. by default all the non > > clamped RT tasks. > > Urgh... why though?
Because tasks without a task-specific clamp value assigned are subject to system default... but those, by default, don't clamp at all:
uclamp_default = [0..1024]
For RT tasks however, we want to execute then always at max OPP, if not otherwise requested (e.g. task-specific value). Thus we need a different set of default clamps:
uclamp_perf_default = [1024..1024]
-- #include <best/regards.h>
Patrick Bellasi
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