On Wed, Jul 8, 2009 at 5:02 PM, Pauli Virtanen <pav...@iki.fi<pav%2...@iki.fi> > wrote:
> On 2009-07-08, Stéfan van der Walt <ste...@sun.ac.za> wrote: > > I know very little about cache optimality, so excuse the triviality of > > this question: Is it possible to design this loop optimally (taking > > into account certain build-time measurable parameters), or is it the > > kind of thing that can only be discovered by tuning at compile-time? > > ATNumPy... scary :-) > > I'm still kind of hoping that it's possible to make some minimal > assumptions about CPU caches in general, and have a rule that > decides a code path that is good enough, if not optimal. > > I don't think we want to go the ATNumPy route, or even have > tunable parameters chosen at build or compile time. (Unless, of > course, we want to bring a monster into the world -- think about > cross-breeding distutils with the ATLAS build system :) > Sort of the software version of the Human Fly. Sounds like next summer's blockbuster movie. Chuck
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