netdev - Re: Drops in qdisc on ifb interface

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Message-ID: <1813033466.134788.1432835671936.JavaMail.open-xchange@oxuslxltgw11.lxa.perfora.net>
Date:	Thu, 28 May 2015 13:54:31 -0400 (EDT)
From:	"jsullivan@...nsourcedevel.com" <jsullivan@...nsourcedevel.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org, John Fastabend <john.fastabend@...il.com>
Subject: Re: Drops in qdisc on ifb interface


> On May 28, 2015 at 1:49 PM Eric Dumazet <eric.dumazet@...il.com> wrote:
>
>
> On Thu, 2015-05-28 at 13:31 -0400, jsullivan@...nsourcedevel.com wrote:
>
> > The overall product does but the video source feeds come over a different
> > network via UDP. There are, however, RTMP quality control feeds coming
> > across
> > this connection. There may also occasionally be test UDP source feeds on
> > this
> > connection but those are not production. Thanks - John
>
> This is important to know, because UDP wont benefit from GRO.
>
> I was assuming your receiver had to handle ~88000 packets per second,
> so I was doubting it could saturate one core,
> but maybe your target is very different.
>
>
>
That PPS estimate seems accurate - the port speed and CIR on the shaped
connection is 1 Gbps.

I'm still mystified by why the GbE bottlenecks on IFB but the 10GbE does not.
 Thanks -  John
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