From: Denys Fedoryschenko <denys@visp.net.lb>
To: Vladimir Ivashchenko <hazard@francoudi.com>
Cc: Eric Dumazet <dada1@cosmosbay.com>, netdev@vger.kernel.org
Subject: Re: bond + tc regression ?
Date: Wed, 6 May 2009 22:30:04 +0300 [thread overview]
Message-ID: <200905062230.04594.denys@visp.net.lb> (raw)
In-Reply-To: <1241635518.13702.37.camel@hazard2.francoudi.com>
On Wednesday 06 May 2009 21:45:18 Vladimir Ivashchenko wrote:
> On Wed, 2009-05-06 at 05:36 +0200, Eric Dumazet wrote:
> > Ah, I forgot about one patch that could help your setup too (if using
> > more than one cpu on NIC irqs of course), queued for 2.6.31
>
> I have tried the patch. Didn't make a noticeable difference. Under 850
> mbps HTB+sfq load, 2.6.29.1, four NICs / two bond ifaces, IRQ balancing,
> the dual-core server has only 25% idle on each CPU.
>
> What's interesting, the same 850mbps load, identical machine, but with
> only two NICs and no bond, HTB+esfq, kernel 2.6.21.2 => 60% CPU idle.
> 2.5x overhead.
Probably oprofile can sched some light on this.
On my own experience IRQ balancing hurt performance a lot, because of cache
misses.
next prev parent reply other threads:[~2009-05-06 19:30 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-05 15:45 bond + tc regression ? Vladimir Ivashchenko
2009-05-05 16:25 ` Denys Fedoryschenko
2009-05-05 16:31 ` Eric Dumazet
2009-05-05 17:41 ` Vladimir Ivashchenko
2009-05-05 18:50 ` Eric Dumazet
2009-05-05 23:50 ` Vladimir Ivashchenko
2009-05-05 23:52 ` Stephen Hemminger
2009-05-06 3:36 ` Eric Dumazet
2009-05-06 10:28 ` Vladimir Ivashchenko
2009-05-06 10:41 ` Eric Dumazet
2009-05-06 10:49 ` Denys Fedoryschenko
2009-05-06 18:45 ` Vladimir Ivashchenko
2009-05-06 19:30 ` Denys Fedoryschenko [this message]
2009-05-06 20:47 ` Vladimir Ivashchenko
2009-05-06 21:46 ` Denys Fedoryschenko
2009-05-08 20:46 ` Vladimir Ivashchenko
2009-05-08 21:05 ` Denys Fedoryschenko
2009-05-08 22:07 ` Vladimir Ivashchenko
2009-05-08 22:42 ` Denys Fedoryschenko
2009-05-17 18:46 ` Vladimir Ivashchenko
2009-05-18 8:51 ` Jarek Poplawski
2009-05-06 8:03 ` Ingo Molnar
2009-05-06 6:10 ` Jarek Poplawski
2009-05-06 10:36 ` Vladimir Ivashchenko
2009-05-06 10:48 ` Jarek Poplawski
2009-05-06 13:11 ` Vladimir Ivashchenko
2009-05-06 13:31 ` Patrick McHardy
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