From owner-freebsd-scsi@FreeBSD.ORG Wed Jul 3 03:20:02 2013 Return-Path: Delivered-To: freebsd-scsi@smarthost.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id EBAF68C6 for ; Wed, 3 Jul 2013 03:20:02 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) by mx1.freebsd.org (Postfix) with ESMTP id DE9AB18B4 for ; Wed, 3 Jul 2013 03:20:02 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.7/8.14.7) with ESMTP id r633K2Xe000256 for ; Wed, 3 Jul 2013 03:20:02 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.7/8.14.7/Submit) id r633K2eQ000255; Wed, 3 Jul 2013 03:20:02 GMT (envelope-from gnats) Date: Wed, 3 Jul 2013 03:20:02 GMT Message-Id: <201307030320.r633K2eQ000255@freefall.freebsd.org> To: freebsd-scsi@FreeBSD.org Cc: From: Sean Bruno Subject: Re: kern/179932: [ciss] ciss i/o stall problem with HP Bl Gen8 (and HP Bl Gen7 + Storage Blade) X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: Sean Bruno List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jul 2013 03:20:03 -0000 The following reply was made to PR kern/179932; it has been noted by GNATS. From: Sean Bruno To: bug-followup@FreeBSD.org, philipp.maechler@hostpoint.ch Cc: Subject: Re: kern/179932: [ciss] ciss i/o stall problem with HP Bl Gen8 (and HP Bl Gen7 + Storage Blade) Date: Tue, 02 Jul 2013 20:13:38 -0700 --=-1oDHSwgoKhillQ25c2wC Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable While I wait for a p420 and p410 to test your configuration, I setup a dl180g6 with a p400 in a test configuration. I've had some interesting results. I setup two disks in a RAID1+0 volume for root and swap and UFS I created a 10 disk raidz2 volume named "ztest": ---------------------------------------------------------------------------= ----- bash-4.2# swapinfo; df -k; zpool status Device 512-blocks Used Avail Capacity /dev/da0p3 16777216 0 16777216 0% ---------------------------------------------------------------------------= ----- Filesystem 1024-blocks Used Avail Capacity Mounted on /dev/da0p2 4058430 1256338 2477418 34% / devfs 1 1 0 100% /dev /dev/da0p4 245197222 6081304 219500142 3% /home procfs 4 4 0 100% /proc ztest 1118637925 67 1118637858 0% /ztest ---------------------------------------------------------------------------= ----- pool: ztest state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM ztest ONLINE 0 0 0 raidz2-0 ONLINE 0 0 0 da1 ONLINE 0 0 0 da2 ONLINE 0 0 0 da3 ONLINE 0 0 0 da4 ONLINE 0 0 0 da5 ONLINE 0 0 0 da6 ONLINE 0 0 0 da7 ONLINE 0 0 0 da8 ONLINE 0 0 0 da9 ONLINE 0 0 0 da10 ONLINE 0 0 0 errors: No known data errors ---------------------------------------------------------------------------= ----- I find that as we reach maximum capacity of /ztest, zfs really starts bogging down. =20 I'm running iozone with the following parameters: ---------------------------------------------------------------------------= ----- iozone -s 50G -r 256K -+q 30 -i 0 -i 1 -R -t 12 -F /ztest/1 /ztest/2 /ztest/3 /ztest/4 /ztest/5 /ztest/6 /ztest/7 /ztest/8 = /ztest/9 /ztest/10 /ztest/11 /ztest/12 ---------------------------------------------------------------------------= ----- This would be a good start to more reliably test your configuration. I didn't bother doing gpt partitions and the geom partitioning scheme in this configuration because its not bootable. Sean --=-1oDHSwgoKhillQ25c2wC Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (FreeBSD) iQEcBAABAgAGBQJR05bZAAoJEBkJRdwI6BaH1BgH/3ohHo9N533wnCXnGPyQFR2d WRJQWwT6NW/YyuHk5M5kNxupRegfS2IHPvrTCEqEHJEgKHaoFkbyUw1BNH0iqECM eelvL8Y4vHxBPqL9BHbUBz6rW19piEB8hZP0kPPhsbI5GR67zzHmIRV82WGTIwQg CtHbEK+77f1Ol5onJ1SYkDJh06swRPOMFZOnAqU2cl2Aw6apLQSWiF2PQ3+jeOk7 wtiqKuL8Sz0428GKvDE6spWNrEW9FS7I3yC6pHKKQB07r7mYgzmg80pJ8KG4qcZ8 f1b/UlBg1nkYb/Tj1LsD6bx0kgp4yHVBRxHo8f8HhGfrU21CZOD197k8Kr69uDA= =GSPu -----END PGP SIGNATURE----- --=-1oDHSwgoKhillQ25c2wC--