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Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc]

To: Stian Jordet <liste@xxxxxxxxxx>
Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc]
From: David Sparks <dave@xxxxxxxxxxxxx>
Date: Tue, 25 Nov 2008 14:02:10 -0800
Cc: "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
In-reply-to: <1227649893.6557.10.camel@oldsmobile>
Organization: SophosLabs
References: <1226760254.5089.11.camel@chevrolet> <430c4fa50811180551r67d5d680tf1ffa493604ac4ea@xxxxxxxxxxxxxx> <1227476908.32357.5.camel@chevrolet> <alpine.DEB.1.10.0811231721350.22594@xxxxxxxxxxxxxxxx> <1227485956.5145.10.camel@chevrolet> <alpine.DEB.1.10.0811240448570.25866@xxxxxxxxxxxxxxxx> <1227569808.5039.6.camel@chevrolet> <alpine.DEB.2.00.0811250057510.27010@xxxxxxxxxxxxxxxx> <1227645887.7992.10.camel@chevrolet> <492C6C9B.3060000@xxxxxxxxxxx> <1227649893.6557.10.camel@oldsmobile>
Reply-to: David Sparks <dave@xxxxxxxxxxxxx>
User-agent: Thunderbird 2.0.0.17 (X11/20080929)
> With no barriers, it's 22s faster than my workstation. That can't be the
> way it's supposed to be?

What IO elevator are you using?  Did you try the 'noop' or 'deadline' 
schedulers?

cat /sys/block/sda/queue/scheduler
echo noop > /sys/block/sda/queue/scheduler

ds

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