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

Timothy Miller
2004-04-27T15:34:36Z

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.