From owner-freebsd-stable@FreeBSD.ORG Fri Jan 17 21:03:37 2014 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 4B97DFF2 for ; Fri, 17 Jan 2014 21:03:37 +0000 (UTC) Received: from mail-pa0-x22d.google.com (mail-pa0-x22d.google.com [IPv6:2607:f8b0:400e:c03::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 20F2B1A0C for ; Fri, 17 Jan 2014 21:03:37 +0000 (UTC) Received: by mail-pa0-f45.google.com with SMTP id lf10so2336056pab.18 for ; Fri, 17 Jan 2014 13:03:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=/YjtFF2R2YozEbqD/jlpGYEqlr5jfzBI8zkRpAnaYwQ=; b=FFMzTLW+52IMnW28tS8RVpF+JI6ShNSHKbaCmVYGrAU58vteQ8mtfY6B12S2w+VOwl Dg8UmU8v40cYNpv6y8/bhyoUw73YJT8I7hw7cHDPH0LQtLCwOAscOlglXGX4H8OEsLC1 /act6ZG+gig4mo6uO5eVh+sxHELDCe7fnC/+czBs9qZqeY2mP+T8mnvr0OuwwCcMlohx tK9jWTe7NiaqPd2raYKkFcQfno0n38CBdlS3zhNrOwDwBNlati/ENVx+CnPi2XtLQoNG hzvpAw12gbv2aMzwCzXwdzHyVKRmixeDBJCMNakhEj+/8H5AVRgrN/X7nU9YcsBWw+FU YKcQ== MIME-Version: 1.0 X-Received: by 10.66.249.202 with SMTP id yw10mr4326146pac.111.1389992616827; Fri, 17 Jan 2014 13:03:36 -0800 (PST) Sender: kob6558@gmail.com Received: by 10.67.30.1 with HTTP; Fri, 17 Jan 2014 13:03:36 -0800 (PST) In-Reply-To: <52D98A83.90805@sentex.net> References: <52D98A83.90805@sentex.net> Date: Fri, 17 Jan 2014 13:03:36 -0800 X-Google-Sender-Auth: fZiej7V12yqN3O_Pr9qIm43DYxo Message-ID: Subject: Re: forwarding performance with releng7 vs 8 vs 9 vs 10 on an Alix box From: Kevin Oberman To: Mike Tancsa Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.17 Cc: FreeBSD-STABLE Mailing List X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 17 Jan 2014 21:03:37 -0000 On Fri, Jan 17, 2014 at 11:54 AM, Mike Tancsa wrote: > We have a couple of sites where we found it was possible to live lock / > crash an alix box if there were too many pps flowing across the unit in > RELENG_8. The same device with releng_7 did not show the same > behaviour. As these boxes are remote and the watchdog would kick in, I > was not able to debug things very much. Even back in the lab, it wasnt > always easy to trigger the crash synthetically, but I could. > > Has anyone done any network performance comparisons between the various > branches for speed and stability for single core embedded platforms like > the ALIX or Soekris ? > > ---Mike > FreeBSD 8 introduced default support for TSO. You might try turning it off (-tso) if it is enabled on the interfaces involved. -- R. Kevin Oberman, Network Engineer, Retired E-mail: rkoberman@gmail.com