Re: [Fwd: [RFC] cfq: adapt slice to number of processes doing I/O(v2.1)]

[Tobias Oetiker]

Hi Corrado,


> > Have you tested buffered write, multi-threads?
> Yes. One interesting test was done by Tobias Oetiker
> (http://oss.oetiker.ch/optools/wiki/fsopbench) on his Areca HW Raid6
> with ext3. He put target_latency to 200ms, and used a lower
> slice_idle, to match his faster disks.

I have since updated my benchmark program:

  http://oss.oetiker.ch/optools/wiki/FsOpBench

it provides an even better competition model. It now works on a
20GB artificial file tree with a home directory like file
distribution. Results are quite striking ... (not necessarily
encouraging).

results are quite amazing ... I am still collecting ... but maybe
some of you want to try this too ...

cheers
tobi

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi@xxxxxxxxxx ++41 62 775 9902 / sb: -9900
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