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DateThu, 10 Jul 2003 01:36:00 +0200
FromDiego Calleja García <>
Subjectbenchmark: 2.5 io test regression?
Hi. I just went to my 2.5 kernel source tree and i did

#time grep foo * -r

in both 2.4 & 2.5

doing this in 2.4 takes:
real    0m50.614s
user    0m1.150s
sys     0m2.560s

2.5.74-mm3 AS:
real    0m46.207s
user    0m1.156s
sys     0m3.161s

2.5.74-mm3 deadline:
real    0m57.418s
user    0m1.160s
sys     0m3.107s

I repeated the tests and they show very similar numbers. One time 2.4 was faster
than 2.5 with AS.
Hardware is p3 2x800 UDMA 100 7200 rpm 2 MB ide disk, filesystem ext3 (default
mount options). DMA was activated in both 2.4 and 2.5.


Should 2.5 be faster here, or it's the expected behaviour? I'd
have expected a bit more of AS, but perhaps AS it isn't good for
this benchmark?



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