> > Raid5 write performance of the celeron is almost 50% better than the k6-2.
>
> Can you report the xor calibration results when booting them?
sure I should be able to pull that out of somewhere
from the k6-2:
raid5: MMX detected, trying high-speed MMX checksum routines
pII_mmx : 1121.664 MB/sec
p5_mmx : 1059.561 MB/sec
8regs : 718.185 MB/sec
32regs : 501.777 MB/sec
using fastest function: pII_mmx (1121.664 MB/sec)
> If possible, let the resync's finish before testing... this can cause a
> huge amount of variance (that I've seen in my testing). speed-limit down
> to 0 doesn't appear to help, either (although the additional seeks to
> get back to the "data" area from the currently resyncing stripes could
> be the base cause)
I did both tests just about identically.
> When looking from a certain realistic POV, it'd be hard to believe that
> even a P5 couldn't keep up with the necessary XOR operations... is
> there anything else on the system(s) fighting for CPU time?
no.
they were blanked - i didn't put them into runlevel 1 but I did shut
down everything I could.
they were pretty low load.
-sv
