} Does anyone know what the time cost is for a cache miss on a given
} executable. I realize that this will vary greatly depending on
} processor etc. What interests me is that a lot of the jitter problems
} are associate with ISA/PCI bus etc, but I'd like to know what the worst
} case contribution for a cache miss on an x86/ppc is.
I did some experiments with locking the i-cache on a PPC right after
finishing the exception entry code to get the cache out of the equation.
There was a very minor (but perceptible) change.
There's probably not a lot the ppc 7400 prefetch-engine can do to improve
determinism either - just increase cache hit rates in certain cases.
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