From: Dave Taht <dave.taht@gmail.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Gabor Juhos <juhosg@openwrt.org>, bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] tiny monsters: multicast packets
Date: Sun, 29 May 2011 11:40:17 -0600 [thread overview]
Message-ID: <BANLkTi=mhS+u-NkuFS2fM5WDJR_jeO4KWA@mail.gmail.com> (raw)
In-Reply-To: <1306689449.30021.16.camel@edumazet-laptop>
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On Sun, May 29, 2011 at 11:17 AM, Eric Dumazet <eric.dumazet@gmail.com>wrote:
> Le dimanche 29 mai 2011 à 11:02 -0600, Dave Taht a écrit :
>
> > The kernel being used in capetown[1] is 2.6.37.6. - patched forward
> > from 2.6.39 for the pfifo ecn bug, the ipv6 ecn bug, and several other
> > bufferbloat related things like sfb...
> >
>
> Hmm, maybe you could try "perf top" if available to make sure cpu time
> is used in this driver, not in another layer ?
>
>
>
>
perf-top does not appear to have been ported to openwrt, and as cool as it
is, I do not know if the related performance counters exist for mips.
it would be darn useful though.
All I know at the moment is that sirq is at 99% at the given workload,
according busybox's top.
http://www.bufferbloat.net/attachments/download/33/routertest.png
It is mildly early to point at the driver as being the issue - it could be
the switch or something else entirely. Would iptables or qos rules show up
in sirq?
--
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://the-edge.blogspot.com
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next prev parent reply other threads:[~2011-05-29 17:24 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-29 13:23 Dave Taht
2011-05-29 14:10 ` Jonathan Morton
2011-05-29 15:10 ` Dave Taht
2011-05-29 15:33 ` Juliusz Chroboczek
2011-05-29 15:44 ` Dave Taht
2011-05-29 15:51 ` Juliusz Chroboczek
2011-05-29 16:07 ` Dave Taht
2011-05-29 16:07 ` Dave Taht
2011-05-29 16:53 ` Dave Taht
2011-05-29 16:33 ` Eric Dumazet
2011-05-29 17:02 ` Dave Taht
2011-05-29 17:17 ` Eric Dumazet
2011-05-29 17:40 ` Dave Taht [this message]
2011-05-29 17:47 ` Jonathan Morton
2011-05-29 19:14 ` Eric Dumazet
2011-05-29 15:21 ` Juliusz Chroboczek
2011-05-29 15:57 ` Dave Taht
2011-05-31 14:58 ` Jim Gettys
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