From: Johannes Thumshirn <jthumshirn@suse.de>
To: Mike Snitzer <snitzer@redhat.com>
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: [dm-devel] [RFC PATCH 0/4] dm mpath: vastly improve blk-mq IO performance
Date: Fri, 01 Apr 2016 10:12:33 +0200 [thread overview]
Message-ID: <6c6623e7f92e31daf1586d266fa03e1d@suse.de> (raw)
In-Reply-To: <1459454666-76428-1-git-send-email-snitzer@redhat.com>
On 2016-03-31 22:04, Mike Snitzer wrote:
> I developed these changes some weeks ago but have since focused on
> regression and performance testing on larger NUMA systems.
>
> For regression testing I've been using mptest:
> https://github.com/snitm/mptest
>
> For performance testing I've been using a null_blk device (with
> various configuration permutations, e.g. pinning memory to a
> particular NUMA node, and varied number of submit_queues).
>
> By eliminating multipath's heavy use of the m->lock spinlock in the
> fast IO paths serious performance improvements are realized.
Hi Mike,
Are this the patches you pointed Hannes to?
If yes, please add my Tested-by: Johannes Thumshirn <jthumshirn@suse.de>
next prev parent reply other threads:[~2016-04-01 8:12 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 ` Johannes Thumshirn [this message]
2016-04-01 13:22 ` [RFC PATCH 0/4] dm mpath: vastly improve blk-mq IO performance 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
2016-04-13 7:03 ` [dm-devel] " Johannes Thumshirn
2016-05-09 15:48 ` Bart Van Assche
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