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Re: XFS lstat() _very_ slow on SMP

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxx
Subject: Re: XFS lstat() _very_ slow on SMP
From: Jan Kasprzak <kas@xxxxxxxxxx>
Date: Sun, 29 May 2005 20:37:50 +0200
In-reply-to: <20050528091123.GA19330@infradead.org>
References: <20050516162506.GB19415@fi.muni.cz> <20050518140258.GA22587@infradead.org> <20050518174530.GF19173@fi.muni.cz> <20050528091123.GA19330@infradead.org>
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Christoph Hellwig wrote:
: > ("time ./bigtree.pl /new-volume 3 128" for 128*128*128 files), and then
: > "strace -c find /new-volume -type f -mtime +1000 -print" (the numbers
: > without strace are almost the same, so strace is not a problem here).
: 
: I couldn't reproduce the odd case here.  Could you try to get some profiling
: data with oprofile for the odd and one of the normal cases?

        I have solved this by adding "ihashsize=65537" to /etc/fstab.
Now my find(1) is limited by the disk speed instead of system time.

-Y.
-- 
| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839      Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/   Czech Linux Homepage: http://www.linux.cz/ |
-- Yes. CVS is much denser.                                               --
-- CVS is also total crap. So your point is?             --Linus Torvalds --


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