Messages in this thread | | | Date | Thu, 14 Mar 2019 14:32:11 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v7 01/15] sched/core: uclamp: Add CPU's clamp buckets refcounting |
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On Thu, Mar 14, 2019 at 12:13:15PM +0000, Patrick Bellasi wrote: > > I'd be most impressed if they pull this off. Check the generated code > > and see I suppose :-) > > On x86 the code generated looks exactly the same: > > https://godbolt.org/z/PjmA7k
Argh, they do mult by inverse to avoid the division, and can do this because its a constant.
And then yes, your arm version looks worse.
It does what I expected with -Os, but as Rutland said the other day, that stands for Optimize for Sadness.
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