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Date: Tue, 17 Feb 2009 17:05:12 -0500
To: Luigi Rizzo <rizzo@iet.unipi.it>, Scott Long <scottl@samsco.org>
From: Mike Tancsa <mike@sentex.net>
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Cc: freebsd-current@freebsd.org, freebsd-stable@freebsd.org
Subject: Re: HEADS UP: Major CAM performance regression
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At 02:57 AM 2/17/2009, Luigi Rizzo wrote:
>On Sat, Feb 14, 2009 at 07:33:25AM -0700, Scott Long wrote:
>...
> > >I'll try your suggestion if you have one.
> >
> > I don't have a magic universal testing suite in my back pocket, sorry.
> > You need to look at your expected workload and develop tests to simulate
> > it.  When I do testing during driver development, I try a lot of
> > different parallel, sequential, large i/o, and small i/o combinations.
>
>i just committed a port sysutils/fio that perhaps can help testing
>IO performance with various patterns.

Hi,
         Do you have any suggestions as to what tests to run with fio ?

Am I right in assuming that the Areca is hit by this bug ?

0[releng7]# camcontrol tags da0
(pass0:arcmsr0:0:0:0): device openings: 1
0[releng7]#

         ---Mike