From: Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
To: Andy Grover <andy.grover-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Yevgeny Petrilin
<yevgenyp-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>
Subject: Re: InfiniBand/RDMA merge plans for 2.6.35
Date: Thu, 10 Jun 2010 13:28:26 -0700 [thread overview]
Message-ID: <ada4ohaljit.fsf@roland-alpha.cisco.com> (raw)
In-Reply-To: <4C114223.1010309-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> (Andy Grover's message of "Thu, 10 Jun 2010 12:50:59 -0700")
> > However, I haven't replied to these patches in detail but in general I
> > don't like this approach of "pick a random vector" since it is
> > non-deterministic and not likely to end up with an optimal result.
> What is the optimal way to do this, if it isn't to spread CQs evenly
> across all available vectors? (least attached vector != random.)
Since there is no way to know whether a given vector has a bunch of CQs
that generate very few events or maybe a single CQ that generates a
heavy load of events, the number of attached CQs is really pretty
useless as a basis to decide. I think it's much better to try and
attach your CQ to a vector that is directed at the CPU where you want to
process the work.
- R.
--
Roland Dreier <rolandd-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org> || For corporate legal information go to:
http://www.cisco.com/web/about/doing_business/legal/cri/index.html
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prev parent reply other threads:[~2010-06-10 20:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-17 16:36 InfiniBand/RDMA merge plans for 2.6.35 Roland Dreier
2010-05-17 16:36 ` Roland Dreier
[not found] ` <adaiq6mo58m.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-05-17 19:58 ` Sean Hefty
[not found] ` <7943A3B0D2C7416186D6A61FE071D640-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-05-18 3:28 ` Roland Dreier
2010-05-19 17:28 ` Jason Gunthorpe
2010-06-07 22:49 ` Andy Grover
[not found] ` <4C0D778C.8070108-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2010-06-09 18:08 ` Roland Dreier
[not found] ` <adar5kgm64d.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-06-10 19:50 ` Andy Grover
[not found] ` <4C114223.1010309-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2010-06-10 20:28 ` Roland Dreier [this message]
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