Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932232AbbFIGJk (ORCPT ); Tue, 9 Jun 2015 02:09:40 -0400 Received: from mail.kernel.org ([198.145.29.136]:34982 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752789AbbFIGJe (ORCPT ); Tue, 9 Jun 2015 02:09:34 -0400 Message-ID: <1433830169.1197.6.camel@hasee> Subject: Re: [PATCH v4 01/11] block: make generic_make_request handle arbitrarily sized bios From: Ming Lin To: Mike Snitzer Cc: Ming Lei , dm-devel@redhat.com, Christoph Hellwig , Alasdair G Kergon , Lars Ellenberg , Philip Kelleher , Joshua Morris , Christoph Hellwig , Kent Overstreet , Nitin Gupta , Oleg Drokin , Al Viro , Jens Axboe , Andreas Dilger , Geoff Levand , Jiri Kosina , lkml , Jim Paris , Minchan Kim , Dongsu Park , drbd-user@lists.linbit.com Date: Mon, 08 Jun 2015 23:09:29 -0700 In-Reply-To: <20150604210617.GA23710@redhat.com> References: <1432318723-18829-1-git-send-email-mlin@kernel.org> <1432318723-18829-2-git-send-email-mlin@kernel.org> <20150526143626.GA4315@redhat.com> <20150526160400.GB4715@redhat.com> <20150528003627.GD32216@agk-dp.fab.redhat.com> <1433138551.11778.4.camel@hasee> <20150604210617.GA23710@redhat.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3726 Lines: 127 On Thu, 2015-06-04 at 17:06 -0400, Mike Snitzer wrote: > We need to test on large HW raid setups like a Netapp filer (or even > local SAS drives connected via some SAS controller). Like a 8+2 drive > RAID6 or 8+1 RAID5 setup. Testing with MD raid on JBOD setups with 8 > devices is also useful. It is larger RAID setups that will be more > sensitive to IO sizes being properly aligned on RAID stripe and/or chunk > size boundaries. Here are tests results of xfs/ext4/btrfs read/write on HW RAID6/MD RAID6/DM stripe target. Each case run 0.5 hour, so it took 36 hours to finish all the tests on 4.1-rc4 and 4.1-rc4-patched kernels. No performance regressions were introduced. Test server: Dell R730xd(2 sockets/48 logical cpus/264G memory) HW RAID6/MD RAID6/DM stripe target were configured with 10 HDDs, each 280G Stripe size 64k and 128k were tested. devs="/dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk" spare_devs="/dev/sdl /dev/sdm" stripe_size=64 (or 128) MD RAID6 was created by: mdadm --create --verbose /dev/md0 --level=6 --raid-devices=10 $devs --spare-devices=2 $spare_devs -c $stripe_size DM stripe target was created by: pvcreate $devs vgcreate striped_vol_group $devs lvcreate -i10 -I${stripe_size} -L2T -nstriped_logical_volume striped_vol_group Here is an example of fio script for stripe size 128k: [global] ioengine=libaio iodepth=64 direct=1 runtime=1800 time_based group_reporting numjobs=48 gtod_reduce=0 norandommap write_iops_log=fs [job1] bs=1280K directory=/mnt size=5G rw=read All results here: http://minggr.net/pub/20150608/fio_results/ Results summary: 1. HW RAID6: stripe size 64k 4.1-rc4 4.1-rc4-patched ------- --------------- (MB/s) (MB/s) xfs read: 821.23 812.20 -1.09% xfs write: 753.16 754.42 +0.16% ext4 read: 827.80 834.82 +0.84% ext4 write: 783.08 777.58 -0.70% btrfs read: 859.26 871.68 +1.44% btrfs write: 815.63 844.40 +3.52% 2. HW RAID6: stripe size 128k 4.1-rc4 4.1-rc4-patched ------- --------------- (MB/s) (MB/s) xfs read: 948.27 979.11 +3.25% xfs write: 820.78 819.94 -0.10% ext4 read: 978.35 997.92 +2.00% ext4 write: 853.51 847.97 -0.64% btrfs read: 1013.1 1015.6 +0.24% btrfs write: 854.43 850.42 -0.46% 3. MD RAID6: stripe size 64k 4.1-rc4 4.1-rc4-patched ------- --------------- (MB/s) (MB/s) xfs read: 847.34 869.43 +2.60% xfs write: 198.67 199.03 +0.18% ext4 read: 763.89 767.79 +0.51% ext4 write: 281.44 282.83 +0.49% btrfs read: 756.02 743.69 -1.63% btrfs write: 268.37 265.93 -0.90% 4. MD RAID6: stripe size 128k 4.1-rc4 4.1-rc4-patched ------- --------------- (MB/s) (MB/s) xfs read: 993.04 1014.1 +2.12% xfs write: 293.06 298.95 +2.00% ext4 read: 1019.6 1020.9 +0.12% ext4 write: 371.51 371.47 -0.01% btrfs read: 1000.4 1020.8 +2.03% btrfs write: 241.08 246.77 +2.36% 5. DM: stripe size 64k 4.1-rc4 4.1-rc4-patched ------- --------------- (MB/s) (MB/s) xfs read: 1084.4 1080.1 -0.39% xfs write: 1071.1 1063.4 -0.71% ext4 read: 991.54 1003.7 +1.22% ext4 write: 1069.7 1052.2 -1.63% btrfs read: 1076.1 1082.1 +0.55% btrfs write: 968.98 965.07 -0.40% 6. DM: stripe size 128k 4.1-rc4 4.1-rc4-patched ------- --------------- (MB/s) (MB/s) xfs read: 1020.4 1066.1 +4.47% xfs write: 1058.2 1066.6 +0.79% ext4 read: 990.72 988.19 -0.25% ext4 write: 1050.4 1070.2 +1.88% btrfs read: 1080.9 1074.7 -0.57% btrfs write: 975.10 972.76 -0.23% -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/