[RFC] Selective scheduling pass

[Andrey Belevantsev]

Seongbae Park (박성배, 朴成培) wrote:
> Presumably this is with any profile feedback ?
> If so, numbers look ok.
You probably mean that the numbers are without profile feedback.  This 
is true.

> Have you tried it with profile feedback ?
> Selective scheduling (and most other aggressive global scheduling algorithms)
> can benefit quite a bit from profile feedback,
> and tuning can be quite different for with and without profile feedback.
No, we haven't tried that.  I've got the impression that profile 
optimizations are not of big importance to GCC developers, so we focused 
on tuning without profile feedback.  Nevertheless, we'll try SPEC with 
profiling feedback tonight.  I will be happy to discuss how the 
scheduler can be tuned to use the profiling information -- will you 
attend the summit btw?

Andrey