From: Christoph Hellwig <hch@infradead.org>
To: Alexandre DERUMIER <aderumier@odiso.com>
Cc: Ceph Devel <ceph-devel@vger.kernel.org>
Subject: Re: krbd blk-mq support ?
Date: Tue, 28 Oct 2014 11:07:25 -0700 [thread overview]
Message-ID: <20141028180725.GA1138@infradead.org> (raw)
In-Reply-To: <fc083e2c-6a73-4ff8-934c-4e3ba1d64b50@mailpro>
On Mon, Oct 27, 2014 at 11:00:46AM +0100, Alexandre DERUMIER wrote:
> >>Can you do a perf report -ag and then a perf report to see where these
> >>cycles are spent?
>
> Yes, sure.
>
> I have attached the perf report to this mail.
> (This is with kernel 3.14, don't have access to my 3.18 host for now)
Oh, that's without the blk-mq patch?
Either way the profile doesn't really sum up to a fully used up
cpu. Sage, Alex - are there any ordring constraints in the rbd client?
If not we could probably aim for per-cpu queues using blk-mq and a
socket per cpu or similar.
next prev parent reply other threads:[~2014-10-28 18:07 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <9894b2d1-b7c6-4a17-9747-d8a41ec208a4@mailpro>
2014-10-24 7:54 ` krbd blk-mq support ? Alexandre DERUMIER
2014-10-24 8:41 ` Ilya Dryomov
2014-10-24 10:55 ` Christoph Hellwig
2014-10-24 12:27 ` Alexandre DERUMIER
2014-10-26 13:46 ` Alexandre DERUMIER
2014-10-26 19:08 ` Somnath Roy
2014-10-27 7:53 ` Alexandre DERUMIER
2014-10-27 10:26 ` Alexandre DERUMIER
2014-10-27 9:45 ` Christoph Hellwig
2014-10-27 10:00 ` Alexandre DERUMIER
2014-10-28 18:07 ` Christoph Hellwig [this message]
2014-10-28 22:31 ` Alex Elder
2014-10-28 23:11 ` Alex Elder
2014-10-29 9:09 ` Alexandre DERUMIER
2014-10-29 15:00 ` Sage Weil
2014-10-30 8:11 ` Alexandre DERUMIER
2014-10-30 16:01 ` Alexandre DERUMIER
2014-10-30 17:05 ` Haomai Wang
2014-10-31 5:04 ` Alexandre DERUMIER
2014-11-03 11:08 ` Christoph Hellwig
2014-11-03 13:08 ` Alexandre DERUMIER
[not found] <90C9DE11-CACE-4533-83EF-6F1F887E6A8F@profihost.ag>
2014-10-31 20:12 ` Alexandre DERUMIER
[not found] <100ed8b3-2427-46d0-9a0c-e5e1a92031af@mailpro>
2014-11-04 7:19 ` Alexandre DERUMIER
2014-11-13 7:18 ` Christoph Hellwig
2014-11-13 9:44 ` Alexandre DERUMIER
2014-12-10 14:05 ` Christoph Hellwig
[not found] ` <1394621476.865737.1418231736651.JavaMail.zimbra@oxygem.tv>
2014-12-10 17:15 ` Alexandre DERUMIER
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