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.
> many tests are appropriate to do? To get a good picture of how it looks
> you should probably try: 0, 8, 16, 64, 128, 512. Once you get some of
> these results, it will be easier to determine which area(s) would be
> most interesting to further explore.
>
> There's also the write passover, I don't think it will have much impact
> on this test though.
Cheers
Kjartan
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This archive was generated by hypermail 2b29 : Fri Nov 15 2002 - 22:00:19 EST