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SubjectRe: [2.5.2-pre3] Harddisk Performance
On Sat, Dec 29 2001, Heinz Diehl wrote:
> Hi!
>
> Running 2.5.2-pre3, hdparm shows up very poor harddisk performance
> on my system compared to 2.4.x:
>
> [Kernel 2.5.2-pre3]
>
> elfie:~ # hdparm -tT /dev/hda
>
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 1.77 seconds = 72.32 MB/sec
> Timing buffered disk reads: 64 MB in 22.09 seconds = 2.90 MB/sec
> ^^^^
> [Kernel 2.4.17]
>
> elfie:~ # hdparm -tT /dev/hda
>
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 1.81 seconds = 70.72 MB/sec
> Timing buffered disk reads: 64 MB in 6.61 seconds = 9.68 MB/sec

Yes I just noticed that too (someone else reported it) -- seems to be
due to missed merges, I'm investigating. The list corruption bug has
higher prio rigth now, though.

--
Jens Axboe

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