Add gcc unroll optimizations in advPosHalf and calcEnergy #13
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Unrolling the small loops in advPosHalf and calcEnergy leads to an improved cycles per instructions retired rate in these loops and hence slightly faster compute times. On an i9-12900, looking using test/sedovbig/sedovbig.pnt I'm seeing improvements in the hydro cycle run time of: 2 threads: 0.2% 4 threads: 0.5% 8 threads: 1.6% 16 threads: 2.1% Signed-off-by: Colin Ian King <[email protected]>
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Unrolling the small loops in advPosHalf and calcEnergy leads to an improved cycles per instructions retired rate in these loops and hence slightly faster compute times.
On an i9-12900, looking using test/sedovbig/sedovbig.pnt I'm seeing improvements in the hydro cycle run time of:
2 threads: 0.2%
4 threads: 0.5%
8 threads: 1.6%
16 threads: 2.1%