Messages in this thread Patch in this message | | | Date | Fri, 22 Dec 2017 12:46:18 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v3 0/6] cpufreq: schedutil: fixes for flags updates |
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On Fri, Dec 22, 2017 at 11:02:06AM +0000, Patrick Bellasi wrote: > > @@ -315,8 +315,8 @@ static unsigned int sugov_next_freq_shared(struct sugov_cpu *sg_cpu, u64 time) > > unsigned long j_util, j_max; > > s64 delta_ns; > > > > - if (j_sg_cpu != sg_cpu) > > - sugov_get_util(j_sg_cpu); > > + if (idle_cpu(j)) > > + continue; > > That should work to skip IDLE CPUs... however I'm missing where now we > get the sugov_get_util(j_sg_cpu) for active CPUs. It has been moved > somewhere else I guess...
No, I'm just an idiot... lemme fix that.
> Moreover, that way don't we completely disregard CFS blocked load for > IDLE CPUs... as well as DL reserved utilization, which should be > released only at the 0-lag time?
I was thinking that since dl is a 'global' scheduler the reservation would be too and thus the freq just needs a single CPU to be observed; but I suppose there's nothing stopping anybody from splitting a clock domain down the middle scheduling wise. So yes, good point.
Blergh that'd make a mess of things again.
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