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Date: Tue, 25 Nov 2008 05:46:01 -0500 (EST) From: Justin Piszcz <jpiszcz@...idpixels.com> To: Christoph Hellwig <hch@...radead.org> cc: Eric Sandeen <sandeen@...deen.net>, Stian Jordet <liste@...det.net>, Alan Piszcz <ap@...arrain.com>, linux-kernel@...r.kernel.org, xfs@....sgi.com Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc] On Tue, 25 Nov 2008, Christoph Hellwig wrote: > On Tue, Nov 25, 2008 at 04:56:24AM -0500, Justin Piszcz wrote: >> barriers enabled: >> >> $ time bash -c 'tar xf linux-2.6.27.7.tar; sync' >> block 573932: ** Block of NULs ** >> Total bytes read: 293857280 (281MiB, 1.9MiB/s) >> >> real 2m40.643s >> user 0m0.194s >> sys 0m1.541s >> >> barriers disabled: >> >> time bash -c 'tar xf linux-2.6.27.7.tar; sync' >> block 573932: ** Block of NULs ** >> Total bytes read: 293857280 (281MiB, 11MiB/s) >> >> real 0m27.612s >> user 0m0.182s >> sys 0m1.617s > > That's worse than usual, and even the no-barriers numbers are still > really bad. What kind of disk and controller is this? Did you > try to disable the cache with hdparm and see what that gives? > WD 750G on ICH7 Device Model: WDC WD7500AAKS-00RBA0 00:1f.2 SATA controller: Intel Corporation 82801GR/GH (ICH7 Family) SATA AHCI Controller (rev 01) I've not tried playing with the cache. Justin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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