On Sat, Feb 11, 2012 at 04:21:25PM +0200, Alexander Motin wrote: > At this moment I am using different penalty coefficients for SMT and > shared caches (for unrelated processes sharing is is not good). No > problem to add more types there. Separate flag for shared FPU could be > used to have different penalty coefficients for usual threads and > FPU-less kernel threads. It is very easy to record the fact of FPU access during the quantum on the context switch-out. So you can at least distinguish numeric code. This can be useful for bulldozer-like machines, if we ever want to optimize for FPU on them.
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