From: Hagen Paul Pfeifer <hagen@jauu.net>
To: netdev@vger.kernel.org, "Motejlek, Petr" <pmotejle@akamai.com>
Cc: netem@osdl.org
Subject: Re: What queues/buffers does tc-netem use?
Date: Thu, 16 Jul 2015 14:42:47 +0200 (CEST) [thread overview]
Message-ID: <116464048.2486.1437050567469.JavaMail.open-xchange@ox1app> (raw)
In-Reply-To: <ed5152b6a0e746b08b00c2dc8270afbc@ustx2ex-dag1mb3.msg.corp.akamai.com>
> On July 16, 2015 at 1:28 PM "Motejlek, Petr" <pmotejle@akamai.com>
> wrote:
> I was wondering what queues/buffers does netem use and how does one
> control or monitor them?
netem uses his own rbtree based queue. You can use tc(1) to get
statistics.
> I could not find this information anywhere and I am not that good in
> reading the sources to be able to tell enough about this :) If we talk
> only about the situation where netem is the root qdisc for a particular
> interface, I would imagine it might be using the txqueue of that
> interface, but I am not sure if that's really the case...
Saddly there is no netem implementation documentation, but the source code
is straightforward. You may take a look:
http://lxr.free-electrons.com/source/net/sched/sch_netem.c
Cheers, Hagen
next prev parent reply other threads:[~2015-07-16 12:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-16 11:28 What queues/buffers does tc-netem use? Motejlek, Petr
2015-07-16 12:42 ` Hagen Paul Pfeifer [this message]
2015-07-16 12:48 ` Motejlek, Petr
2015-07-16 13:04 ` Hagen Paul Pfeifer
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