Re: 5.1 RAID5 write performance

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

On Tue, May 03, 2011 at 06:06:44PM +0200, Edgar Fuß wrote:
> mrg asked me to build a kernel with HZ=1024 and test.
> It got worse.
> 
> Anything else I can test or instrument?

You could try turn off RAIDframe parity maps (which are a very useful
feature in general) with "raidctl -M no raid<n>", reboot your machine
afterwards and repeat your performance tests.

        Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/