Re: Optimization opportunities unexploited: examples sought

(1) this should have been cross-posted to comp.arch, not comp.arch.arithmetic.


(2) profiling feedback to compilers is standard technology nowadays -
although admittedly Intel's compiler team is the biggest advocate.


The real issue is not doing the feedback, but making easier and easier
the task of collecting the data (for which I espouse the use of
statistical feedback using interrupt sampling, measuring real users on
real machines in production, not just test).
        I.e. it is more of an OS issue than a compiler issue.


A related research issue is using non-temporal performance metrics,
e.g. using measurements of where cache misses and branch
mispredictions are occurring.


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Andy "Krazy" Glew, glew@ichips.intel.com, Intel,
M/S JF1-19, 5200 NE Elam Young Pkwy, Hillsboro, Oregon 97124-6497.
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