Re: LSI53C1030 (Fustion MPT) performance

[Andrew Morton]

Karl Pitrich <pit@xxxxxxx> wrote:
>
> hi,
> 
> i got a new ibm intellistation z pro dual xeon (6221-49G) with on board 
> Fusion MPT chipset (LSI53C1030) and fast U160 disks.
> 
> 2.4.20-8 (redhat) and 2.6.0-test9-vanilla 
> (each customer compiled minimal kernels) 
> both yield very poor disk performance.
> 
> i didn't do specific benkchmarking, but mv'ing a 3GB $HOME to another
> partition takes at least 4x the time as on my old P4 workstation with
> IDE drive.
> 
> is poor performance with this controller a known problem?
> could that have to do something with smp?
> 
> in 2.6.0, the driver's cvs-versions seem to match the ones in the
> sources offered by LSI for download.
> lkml-archives and google weren't all too helpful.
> 

The 2.6 driver runs nicely in single-disk mode but has been reported to run
like a dog in RAID mode.  I do not know if the 2.4 driver has the same problem.


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