[petsc-dev] More prefetch

[Jed Brown]

Barry Smith <bsmith at mcs.anl.gov> writes:
>   I have added the option —with-prefetch=0 (or —disable-prefetch etc)

Thanks, Barry.  Intel's latest "Haswell" processors have a much smarter
hardware prefetch and I've observed AIJ non-inode running faster without
software prefetch and also non-inode running faster than inode.  So this
is becoming a decision that we should start making dynamically.
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