From: Mike Snitzer <snitzer@redhat.com>
To: Johannes Thumshirn <jthumshirn@suse.de>
Cc: dm-devel@redhat.com, linux-scsi@vger.kernel.org,
sagig@dev.mellanox.co.il, linux-block@vger.kernel.org,
jmoyer@redhat.com, j-nomura@ce.jp.nec.com
Subject: Re: [RFC PATCH 0/4] dm mpath: vastly improve blk-mq IO performance
Date: Fri, 8 Apr 2016 15:29:39 -0400 [thread overview]
Message-ID: <20160408192938.GC8453@redhat.com> (raw)
In-Reply-To: <2760420.6GyDefUaH5@c203>
On Fri, Apr 08 2016 at 7:42am -0400,
Johannes Thumshirn <jthumshirn@suse.de> wrote:
> Ladies and Gentlemen,
> To show off some numbers from our testing:
>
> All tests are performed against the cache of the Array, not the disks as we
> wanted to test the Linux stack not the Disk Array.
>
> All single queue tests have been performed with the deadline I/O Scheduler.
>
> Comments welcome, have fun reading :-)
Any chance you collected performance results from DM MQ on this same
testbed without any variant of my lockless patches? The DM SQ results
aren't too interesting a reference point. Seeing how much better
lockless DM MQ (multipath) is than the old m->lock heacy code (still in
4.6) would be more interesting.
Not a big deal if you don't have it.. but figured I'd check to see.
And thanks for the numbers you've provided.
Mike
next prev parent reply other threads:[~2016-04-08 19:29 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-31 20:04 [RFC PATCH 0/4] dm mpath: vastly improve blk-mq IO performance Mike Snitzer
2016-03-31 20:04 ` [RFC PATCH 1/4] dm mpath: switch to using bitops for state flags Mike Snitzer
2016-04-01 8:46 ` [dm-devel] " Johannes Thumshirn
2016-04-07 14:59 ` Hannes Reinecke
2016-03-31 20:04 ` [RFC PATCH 2/4] dm mpath: use atomic_t for counting members of 'struct multipath' Mike Snitzer
2016-04-01 8:48 ` [dm-devel] " Johannes Thumshirn
2016-04-07 15:02 ` Hannes Reinecke
2016-03-31 20:04 ` [RFC PATCH 3/4] dm mpath: move trigger_event member to the end " Mike Snitzer
2016-04-01 8:50 ` [dm-devel] " Johannes Thumshirn
2016-04-07 15:03 ` Hannes Reinecke
2016-03-31 20:04 ` [RFC PATCH 4/4] dm mpath: eliminate use of spinlock in IO fast-paths Mike Snitzer
2016-04-01 9:02 ` [dm-devel] " Johannes Thumshirn
2016-04-07 15:03 ` Hannes Reinecke
2016-04-01 8:12 ` [dm-devel] [RFC PATCH 0/4] dm mpath: vastly improve blk-mq IO performance Johannes Thumshirn
2016-04-01 13:22 ` Mike Snitzer
2016-04-01 13:37 ` Johannes Thumshirn
2016-04-01 14:14 ` Mike Snitzer
2016-04-07 14:58 ` Hannes Reinecke
2016-04-07 15:34 ` Mike Snitzer
2016-04-08 11:42 ` [dm-devel] " Johannes Thumshirn
2016-04-08 19:29 ` Mike Snitzer [this message]
2016-04-13 7:03 ` Johannes Thumshirn
2016-05-09 15:48 ` Bart Van Assche
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