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From: Con Kolivas <kernel@kolivas.org>
To: Serge Belyshev <belyshev@depni.sinp.msu.ru>
Cc: Christoph Lameter <cl@gentwo.org>, Joe Perches <joe@perches.com>,
	starlight@binnacle.cx, Eric Dumazet <eric.dumazet@gmail.com>,
	linux-kernel@vger.kernel.org, netdev <netdev@vger.kernel.org>,
	Willy Tarreau <w@1wt.eu>, Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: big picture UDP/IP performance question re 2.6.18  -> 2.6.32
Date: Wed, 5 Oct 2011 09:32:10 +1100	[thread overview]
Message-ID: <201110050932.10374.kernel@kolivas.org> (raw)
In-Reply-To: <87zkhg1ppl.fsf@depni.sinp.msu.ru>

On Wed, 5 Oct 2011 07:12:06 Serge Belyshev wrote:
> BFS FAQ writes:
> > NUMA aware?
> > 
> > It is NOT NUMA aware in the sense that it does any fancy shit on NUMA,
> > but it will work on NUMA hardware just fine. Only the really big NUMA
> > hardware is likely to suffer in performance, and this is theoretically
> > only, since no one has that sort of hardware to prove it to me, but it
> > seems almost certain.
> 
> This part of FAQ entry was written before 0.300, (i.e. more than 2 years
> ago)
> 
> > v0.300 onwards have NUMA enhancements.
> 
> And this was added after. =)
> 
> As of now, BFS scheduling is NUMA-aware. (see resched_best_mask())

Admittedly the wording of this got confused as BFS developed. It originally 
had no NUMA enhancements, but now it does. The code to benefit NUMA is quite 
simple though, but then, so is everything in BFS.

Regards,
Con
-- 
-ck

  reply	other threads:[~2011-10-04 22:32 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-03 15:25 big picture UDP/IP performance question re 2.6.18 -> 2.6.32 starlight
2011-10-03 16:16 ` Eric Dumazet
     [not found]   ` <1317658588.2442.5.camel@edumazet-HP-Compaq-6005-Pro -SFF-PC>
2011-10-03 16:28     ` starlight
2011-10-04 19:16 ` Christoph Lameter
2011-10-04 19:38   ` Joe Perches
2011-10-04 19:42     ` Christoph Lameter
2011-10-04 19:49       ` Serge Belyshev
2011-10-04 20:03         ` Christoph Lameter
2011-10-04 20:12           ` Serge Belyshev
2011-10-04 22:32             ` Con Kolivas [this message]
2011-10-04 19:45     ` starlight
2011-10-05 13:22   ` Peter Zijlstra
2011-10-05 14:26     ` Christoph Lameter
2011-10-05 15:12       ` Andi Kleen
2011-10-05 15:33       ` Peter Zijlstra
2011-10-05 15:12     ` starlight
  -- strict thread matches above, loose matches on Subject: below --
2011-10-07  3:27 starlight
2011-10-07  5:40 ` Eric Dumazet
2011-10-07  6:13   ` starlight
2011-10-07 18:09     ` chetan loke
     [not found]       ` <CAAsGZS4s1wTWW1j7FRUWW9jqpPUVF3Q46AMa7+njvE1ckX0Snw @mail.gmail.com>
2011-10-07 18:37         ` starlight
2011-10-07 19:27           ` chetan loke
     [not found]             ` <CAAsGZS4b2F9N3nV3TNu5xG+=2d0L0ncste4xv2vqoVFb1pOxEw @mail.gmail.com>
2011-10-07 19:41               ` starlight
2011-10-07 20:07           ` Ben Hutchings
2011-10-11 16:24   ` Chris Friesen
2011-10-07  2:33 starlight
2011-10-07  2:24 starlight
2011-10-05  6:58 starlight
2011-10-05  8:53 ` Eric Dumazet
     [not found]   ` <1317804832.2473.25.camel@edumazet-HP-Compaq-6005-Pr o-SFF-PC>
2011-10-05 11:50     ` starlight
2011-10-05  6:11 starlight
2011-10-05  3:35 starlight
2011-10-03 18:02 starlight
2011-10-05  6:53 ` Eric Dumazet
2011-10-02  5:33 starlight
2011-10-02  7:21 ` Eric Dumazet
2011-10-02  8:03   ` Eric Dumazet
2011-10-02 14:47   ` Stephen Hemminger
2011-10-02 15:06   ` starlight
2011-10-04 19:54     ` Loke, Chetan
2011-10-01 21:13 starlight
2011-10-01 18:16 starlight
2011-10-01 18:40 ` Willy Tarreau
2011-10-01 19:11 ` Eric Dumazet
2011-10-01 19:43   ` starlight
2011-10-01  5:30 starlight
2011-10-01  6:44 ` Eric Dumazet
2011-10-01 15:56   ` starlight

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