Re: [BENCHMARK] 2.4.{18,19{-ck9},20rc1{-aa1}} with contest
Jens Axboe (axboe@suse.de)
Sun, 10 Nov 2002 11:17:30 +0100
On Sun, Nov 10 2002, Kjartan Maraas wrote:
> lør, 2002-11-09 kl. 14:54 skrev Jens Axboe:
>
> [SNIP]
>
> > The default is 2048. How long does the io_load test take, or rather how
>
> The default on my RH system with the latest errata kernel is as follows:
>
> [root@sevilla kmaraas]# elvtune /dev/hda
>
> /dev/hda elevator ID 0
> read_latency: 8192
> write_latency: 16384
> max_bomb_segments: 6
>
> [root@sevilla kmaraas]# uname -a
> Linux sevilla.gnome.no 2.4.18-17.7.x #1 Tue Oct 8 13:33:14 EDT 2002 i686
> unknown
> [root@sevilla kmaraas]#
>
> Is this worth changing to lower values then? They seem to be an awful
> lot higher than the values mentioned below here.
As I mentioned in the email sent out a few minutes ago, you cannot
compare the values from 2.4.19 and earlier to 2.4.20-pre/rc at all. The
algorithm for determining when a request is starved has been changed to
be more correct, and that has invalidated these values.
--
Jens Axboe
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