Messages in this thread | | | From | Michael Frank <> | Subject | Re: ext2/3 performance regression in 2.6 vs 2.4 for small interleaved writes | Date | Thu, 12 Feb 2004 05:02:39 +0800 |
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On Thursday 12 February 2004 04:28, Rik van Riel wrote: > On Wed, 11 Feb 2004, Jon Burgess wrote: > > > Write speed in MB/s using an ext2 filesystem for 1 and 2 streams: > > Num streams: 1 2 > > linux-2.4.22 10.47 6.98 > > linux-2.6.2 9.71 0.34 > > > During the disk light is on solid and it really slows any other disk > > access. It looks like the disk is continuously seeking backwards and > > forwards, perhaps re-writing the meta data. > > Just for fun, could you also try measuring how long it takes > to read back the files in question ? > > Both individually and in parallel... >
2.4 has a deadline scheduler. 2.6 default is anticipatory.
Could you please boot with scheduler=deadline to compare apples with apples.
Regards Michael
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