From: Bill Fink <billfink@mindspring•com>
To: Jarek Poplawski <jarkao2@gmail•com>
Cc: Eric Dumazet <eric.dumazet@gmail•com>,
Rick Jones <rick.jones2@hp•com>,
Steven Brudenell <steven.brudenell@gmail•com>,
netdev@vger•kernel.org
Subject: Re: tbf/htb qdisc limitations
Date: Tue, 19 Oct 2010 03:37:24 -0400 [thread overview]
Message-ID: <20101019033724.0bffbe88.billfink@mindspring.com> (raw)
In-Reply-To: <20101017203618.GA1889@del.dom.local>
On Sun, 17 Oct 2010, Jarek Poplawski wrote:
> On Sat, Oct 16, 2010 at 09:24:34PM -0400, Bill Fink wrote:
> > On Sat, 16 Oct 2010, Jarek Poplawski wrote:
> ...
> > > http://code.google.com/p/pspacer/wiki/HTBon10GbE
> > >
> > > If it doesn't help reconsider hfsc.
> >
> > Thanks for the link. From his results, it appears you can
> > get better accuracy by keeping TSO/GSO enabled and upping
> > the tc mtu parameter to 64000. I will have to try that out.
>
> Sure, but you have to remember that scheduler doesn't know real packet
> sizes and rate tables are less accurate especially for smaller packets,
> so it depends on conditions.
On my testing on the real data path, TSO/GSO enabled did seem
to give more accurate results for a single stream. But when
I tried multiple 10-GigE paths simultaneously, each with a
single stream across it, non-TSO/GSO seemed to fare better
overall.
-Bill
next prev parent reply other threads:[~2010-10-19 7:37 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-08 20:58 tbf/htb qdisc limitations Steven Brudenell
2010-10-10 11:23 ` Jarek Poplawski
2010-10-11 22:27 ` Steven Brudenell
2010-10-12 10:10 ` Jarek Poplawski
2010-10-12 19:31 ` Steven Brudenell
2010-10-12 21:59 ` Jarek Poplawski
2010-10-12 22:17 ` Rick Jones
2010-10-13 6:26 ` Jarek Poplawski
2010-10-14 3:36 ` Bill Fink
2010-10-14 4:01 ` Eric Dumazet
2010-10-14 6:34 ` Bill Fink
2010-10-14 6:44 ` Jarek Poplawski
2010-10-14 7:13 ` Bill Fink
2010-10-14 8:09 ` Jarek Poplawski
2010-10-14 8:50 ` Jarek Poplawski
2010-10-15 6:37 ` Bill Fink
2010-10-15 6:44 ` Eric Dumazet
2010-10-15 21:37 ` Bill Fink
2010-10-15 22:05 ` Jarek Poplawski
2010-10-16 4:51 ` Bill Fink
2010-10-16 20:58 ` Jarek Poplawski
2010-10-17 1:24 ` Bill Fink
2010-10-17 20:36 ` Jarek Poplawski
2010-10-19 7:37 ` Bill Fink [this message]
2010-10-20 11:06 ` Jarek Poplawski
2010-10-27 4:51 ` Bill Fink
2010-10-27 9:48 ` Jarek Poplawski
2010-10-15 8:18 ` Jarek Poplawski
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