Date: Sat, 14 Sep 2013 16:28:02 +0200 From: Luigi Rizzo <rizzo@iet.unipi.it> To: George Neville-Neil <gnn@neville-neil.com> 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>, "Andrey V. Elsukov" <ae@freebsd.org>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: Network stack changes Message-ID: <20130914142802.GC71010@onelab2.iet.unipi.it> In-Reply-To: <6BDA4619-783C-433E-9819-A7EAA0BD3299@neville-neil.com> References: <521E41CB.30700@yandex-team.ru> <CAJ-Vmo=N=HnZVCD41ZmDg2GwNnoa-tD0J0QLH80x=f7KA5d%2BUg@mail.gmail.com> <6BDA4619-783C-433E-9819-A7EAA0BD3299@neville-neil.com>
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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
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