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Subjectraid5 autoselecting a slower checksum function

This is 2.6.0-test2 on a Celeron 900:

raid5: measuring checksumming speed
8regs : 1640.000 MB/sec
8regs_prefetch: 1316.000 MB/sec
32regs : 824.000 MB/sec
32regs_prefetch: 788.000 MB/sec
pIII_sse : 1744.000 MB/sec
pII_mmx : 2244.000 MB/sec
p5_mmx : 2400.000 MB/sec
raid5: using function: pIII_sse (1744.000 MB/sec)

Why doesn't it select p5_mmx if it is 37% faster than pIII_sse?

--
Meelis Roos (mroos@linux.ee)


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