Re: mpt Serious performance issues

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Fri, Nov 26, 2010 at 08:49:48AM +0100, Stephan wrote:
> Hi folks,
> 
> I already sent this to netbsd-users but didn´t get an answer. The
> Netbsd mpt driver in release 5.0.2 and 5.1 does perform extremely slow
> on LSI Logic 1030 RAID controllers. Some findings:
> 
> Write speed:
> 
> # dd if=/dev/zero of=myfile bs=4096 count=10000
> 10000+0 records in
> 10000+0 records out
> 40960000 bytes transferred in 12.762 secs (3209528 bytes/sec)
> 
> Read speed after reboot:
> 
> # dd if=myfile of=/dev/null
> 80000+0 records in
> 80000+0 records out
> 40960000 bytes transferred in 6.929 secs (5911386 bytes/sec)

what does 'dd if=myfile of=/dev/null bs=64k' shows ?

Also, what RAID level is it ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--