Date: Thu, 29 Nov 2007 19:31:58 +0100 From: Max Laier <max@love2party.net> To: freebsd-stable@freebsd.org Cc: Pete French <petefrench@ticketswitch.com> Subject: Re: Also seeing 2 x quad-core system slower that 2 x dual core Message-ID: <200711291932.05614.max@love2party.net> In-Reply-To: <E1IxklH-000ElU-3w@dilbert.ticketswitch.com> References: <E1IxklH-000ElU-3w@dilbert.ticketswitch.com>
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--nextPart2208875.pVoCQ49vJz Content-Type: text/plain; charset="iso-8859-6" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thursday 29 November 2007, Pete French wrote: > I think I also just came up against the same effect that the original > poster saw. I have two sets of machines here - one is a pair of dual > core Xeons, the other a pair of quad core Xeons. They are HP servers, > more or less identical apart from the processors I belive. > > Both have 7.0-BETA3 installed, and the same config on them with the > same files. I am trying to delete a gigabyte of files using 'rm -rf' > > On the dual core processors this takes about 20 seconds. On the quad > cores it takes about 3 minutes! This is true for both the 32 and 64 bit > versions of FreeBSD :-( Can you provide more details on this task? It seems like something that=20 could easily be reproduced in a lab environment and serve as a regression=20 test and baseline for future improvements. Is the server doing any other=20 work while doing the rm, or is this it? What kind of directory layout=20 are we looking at? How many files, directories, users ...? What type of=20 filesystem, options, size? BTW, what's your nsswitch.conf like? If you don't need nis, removing it=20 can mean a considerable speed improvement - or try nscd(8). =2D-=20 /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News --nextPart2208875.pVoCQ49vJz Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQBHTwWlXyyEoT62BG0RAlDCAJ9jlko6Lz/lUFMBXH23JO8zu/LyDgCeODDT 4DK7lVa0Qe3y59FgHRGaZ/A= =OaRh -----END PGP SIGNATURE----- --nextPart2208875.pVoCQ49vJz--
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