Re: [PATCH v7 01/15] sched/core: uclamp: Add CPU's clamp buckets refcounting

Patrick Bellasi
2019-03-14T15:07:53Z

On 14-Mar 14:32, Peter Zijlstra wrote:
> 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.

your "arm version" is worst then x86, or "your version" is worse?

IOW, should I keep the code as the original? Do you prefer your
version? Or... we don't really care...

> It does what I expected with -Os, but as Rutland said the other day,
> that stands for Optimize for Sadness.

Yes, I guess we cannot optimize for all flags... however, just let me
know what you prefer and I'll put that version in ;)

--
#include <best/regards.h>

Patrick Bellasi