From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Noll Subject: Re: Performance problems with 3ware 9500S-4LP and 2.6.25-rc3 Date: Thu, 28 Feb 2008 10:46:20 +0100 Message-ID: <20080228094620.GD29468@skl-net.de> References: <20080226174314.GA30767@skl-net.de> <47C45B80.6090907@redhat.com> <20080227101143.GC30767@skl-net.de> <47C5C048.9080704@redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="wLAMOaPNJ0fu1fTG" Return-path: Received: from systemlinux.org ([83.151.29.59]:59565 "EHLO m18s25.vlinux.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755291AbYB1Jst (ORCPT ); Thu, 28 Feb 2008 04:48:49 -0500 Content-Disposition: inline In-Reply-To: <47C5C048.9080704@redhat.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Chris Snook Cc: adam radford , Tony Battersby , Johannes =?iso-8859-1?Q?W=F6rner?= , James Bottomley , linux-scsi , linux-kernel --wLAMOaPNJ0fu1fTG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 14:55, Chris Snook wrote: > Does the machine become unresponsive during the single-threaded test, or= =20 > only when doing the rsync? It takes noticably longer to ssh into the machine also in the single-threaded case (using dd to write to the device), but the system remains usable. When the rsync job is running, it becomes unusable quickly. However, reducing the queue depth with echo 16 > /sys/block/sda/device/queue_depth as suggested by Adam, solves all problems. Thanks all for your help. Andre --=20 The only person who always got his work done by Friday was Robinson Crusoe --wLAMOaPNJ0fu1fTG Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFHxoLsWto1QDEAkw8RAoAHAJ0TFMt26ioLR/WskxAUW5Td+OqmRQCeNcH3 EDQQFgyymODIGTVteQrHULA= =nnxa -----END PGP SIGNATURE----- --wLAMOaPNJ0fu1fTG--