Re: IDE throughput in 2.6 - it's good!

Ken Moffat
2004-04-27T19:17:44Z

On Tue, 27 Apr 2004, Timothy Miller wrote:

>
>
> Ken Moffat wrote:
>
> >
> > So, despite the numbers shown by hdparm looking worse, when only one
> > user is doing anything the performance is actually improved. I've no
> > idea which changes have achieved this, but thanks to whoever were
> > involved.
>
>
> I've done tests using dd to and from the raw block device under 2.4 and
> 2.6. Memory size (kernel boot param mem=) doesn't seem to affect
> performance, so I assume that means that dd to and from the raw block
> device is unbuffered. When I compare read and write speeds between 2.4
> and 2.6, 2.6 is definately slower. The last 2.6 kernel I tried this
> with is 2.6.5.
>

Well, my original test used cp, sync, rm, sync. I've no statistics
from running 2.4 on this box to compare against.

Ken
--
das eine Mal als Tragödie, das andere Mal als Farce