From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752004AbaCHUJW (ORCPT ); Sat, 8 Mar 2014 15:09:22 -0500 Received: from sonne.alt-f4.ch ([95.128.33.42]:57013 "EHLO sonne.alt-f4.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751626AbaCHUJU (ORCPT ); Sat, 8 Mar 2014 15:09:20 -0500 Date: Sat, 8 Mar 2014 21:14:50 +0100 From: markus To: Purush Gupta Cc: Nagalakshmi Nandigama , Sreekanth Reddy , support@lsi.com, DL-MPTFusionLinux@lsi.com, linux-scsi@vger.kernel.org, Linux Kernel List Subject: Re: Slow I/O performance on SAS1064 Message-ID: <20140308201450.GA18581@localhost.localdomain> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3V7upXqbjpZ4EhLz" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --3V7upXqbjpZ4EhLz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Mar 07, 2014 at 08:24:48AM -0800, Purush Gupta wrote: > I noticed you had benchmarked only sda target, is the behavior same on > other targets? >=20 Yes the other disk are equal to sda , but they are used with zfs and there = were other preformance problems because of the multible disk access. config: NAME STATE READ WRITE CKSUM home ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 sdb ONLINE 0 0 3 sdc ONLINE 0 0 0 sdd ONLINE 0 0 0 > Since they are SCSI targets, have you explored sg_utils [ > http://sg.danny.cz/sg/uu_index.html] >=20 > And for benchmarking I also recommend FIO https://github.com/axboe/fio >=20 Thanks for the tips. > Good luck, > Purush >=20 --3V7upXqbjpZ4EhLz Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJTG3o5AAoJENNjYPi2hQIw2SEQAIaoXDMfl3+tJsG1mCzCdp9t 84bBZ3IBYyvR3efF54VJs/RxX3bWnerLiljSz7WXz5Y9O/BmzeuDVN55LTMEMbPo DmI6Z177SHZgkRw3xYJDwSHX/t8eyfC1sdBH2NgnpNOL4Uw+wEVHdY5ZKRW8nJ7u C9uAHfLPNnwCfv9PkBeZlRyWk/KHGY6UQC8iJu7ORB1pkNs+MZmq1KCxXLyJGFIh M197//ax+pcqoRXrsQSbIa4tN633in4LKcE+6UKjQZkXq27AQR6b5bn/Tf0mFOIE d2SHN8SL/AHIshoq3etzjVbNtpj35SRVjwjqlFl6/ZT0bhDMrGQW7tRg9alLLUG0 bl68BEfEQP1aU2OcXkyW/X5x8yCnt//rBUtN7XTp3UkE5UAtc9u8YY9ZCuHNqWHL dt+C+OghSG/0mHwdeEltZr4JF4jwJuhB6zbnWS/ZB/Y10IzbdH6i5AOJd4yLJ6e9 TxmVUQDga+K9gr5xMTn5F2uxdYyZsALW4Ss+eOe+e5RGHNhMWNbyw2CuGIw/964v ksJKg6Dh10ZeIM/C05TPelr8g6l9Pw/k/9q1czMRf0VElnJmQi6NmtRqFNE6l6Uh xJQ90kYAM3DNSn9f8xJQPMaoeaVeC4KlRXYO9aeYUzr5frierEEk0eEoS4pYvI4N PYtqW7LUGgGVXFZq17gh =/jiA -----END PGP SIGNATURE----- --3V7upXqbjpZ4EhLz--