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Date: Sat, 14 Sep 2013 16:28:02 +0200
From: Luigi Rizzo <rizzo@iet.unipi.it>
To: George Neville-Neil <gnn@neville-neil.com>
Subject: Re: Network stack changes
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Cc: "Alexander V. Chernikov" <melifaro@yandex-team.ru>,
 Adrian Chadd <adrian@freebsd.org>, Andre Oppermann <andre@freebsd.org>,
 "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>,
 FreeBSD Net <net@freebsd.org>, Luigi Rizzo <luigi@freebsd.org>,
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 "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org>
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On Fri, Sep 13, 2013 at 11:08:27AM -0400, George Neville-Neil wrote:
> 
> On Aug 29, 2013, at 7:49 , Adrian Chadd <adrian@freebsd.org> wrote:
...
> > I still have some tool coding to do with PMC before I even think about
> > tinkering with this as I'd like to measure stuff like per-packet latency as
> > well as top-level processing overhead (ie, CPU_CLK_UNHALTED.THREAD_P /
> > lagg0 TX bytes/pkts, RX bytes/pkts, NIC interrupts on that core, etc.)
> > 
> 
> This would be very useful in identifying the actual hot spots, and would be helpful
> to anyone who can generate a decent stream of packets with, say, an IXIA.

IXIA ? For the timescales we need to address we don't need an IXIA,
a netmap sender is more than enough

cheers
luigi