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Re: xfs_fsr, sunit, and swidth

To: Dave Hall <kdhall@xxxxxxxxxxxxxx>
Subject: Re: xfs_fsr, sunit, and swidth
From: Stefan Ring <stefanrin@xxxxxxxxx>
Date: Thu, 14 Mar 2013 19:07:25 +0100
Cc: "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
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> Lastly, I will mention that I see almost 0% wa when watching top.

I notice that XFS in general will report less % wa than ext4, although
it exercises the disks a bit more when traversing a large directory
tree, for example. But with 64 cores, you will see at most 1.5% in top
anyway, if one process is doing nothing but waiting on the disk.

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