From owner-svn-src-all@FreeBSD.ORG  Fri Oct 17 00:07:27 2014
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id B5CD7AD;
 Fri, 17 Oct 2014 00:07:27 +0000 (UTC)
Received: from cell.glebius.int.ru (glebius.int.ru [81.19.69.10])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "cell.glebius.int.ru", Issuer "cell.glebius.int.ru" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 33E80393;
 Fri, 17 Oct 2014 00:07:26 +0000 (UTC)
Received: from cell.glebius.int.ru (localhost [127.0.0.1])
 by cell.glebius.int.ru (8.14.9/8.14.9) with ESMTP id s9H07OjP089506
 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO);
 Fri, 17 Oct 2014 04:07:24 +0400 (MSK)
 (envelope-from glebius@FreeBSD.org)
Received: (from glebius@localhost)
 by cell.glebius.int.ru (8.14.9/8.14.9/Submit) id s9H07NKS089505;
 Fri, 17 Oct 2014 04:07:23 +0400 (MSK)
 (envelope-from glebius@FreeBSD.org)
X-Authentication-Warning: cell.glebius.int.ru: glebius set sender to
 glebius@FreeBSD.org using -f
Date: Fri, 17 Oct 2014 04:07:23 +0400
From: Gleb Smirnoff <glebius@FreeBSD.org>
To: Luigi Rizzo <rizzo@iet.unipi.it>
Subject: Re: svn commit: r272906 - in head/sys: conf libkern netpfil/pf sys
Message-ID: <20141017000723.GG73266@FreeBSD.org>
References: <201410101926.s9AJQRY1049602@svn.freebsd.org>
 <CA+q+Tcpt0zEbgu_LndZb4dzh=xykHvppeykuiG6P9cTJgDGeWw@mail.gmail.com>
 <20141015030455.GC73266@FreeBSD.org>
 <CAPyFy2CDSwLkTtPFj70tw2iuDam3rS4yFNri=pX0w7_58UYMoA@mail.gmail.com>
 <20141015041418.GE73266@FreeBSD.org>
 <20141016230446.GA11048@onelab2.iet.unipi.it>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20141016230446.GA11048@onelab2.iet.unipi.it>
User-Agent: Mutt/1.5.23 (2014-03-12)
Cc: src-committers <src-committers@freebsd.org>, Ed Maste <emaste@freebsd.org>,
 svn-src-all <svn-src-all@freebsd.org>,
 "George V. Neville-Neil" <gnn@freebsd.org>,
 Olivier Cochard-Labb? <olivier@cochard.me>,
 svn-src-head <svn-src-head@freebsd.org>
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
 user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all/>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 17 Oct 2014 00:07:27 -0000

  Luigi,

On Fri, Oct 17, 2014 at 01:04:46AM +0200, Luigi Rizzo wrote:
L> > Thanks a lot, Ed. I rerun the tests. Results are fine. Distribution
L> > is equal (plots attached).
L> > 
L> > Murmur is 9% +/- 1.5% faster. Sorry for noise.
L> 
L> is that 9% on the hash alone ?

Right.

L> If so it is surprising that you could see any change on pf's throughput.
L> In my very non-scientific tests with VALE, doing two hashes on
L> the MAC address would result in 17 Mpps vs 20 Mpps when no hashes were done.
L> The difference is about 8ns, which is totally in the noise at 2 Mpps or less.

We share exactly the same position here. Notice also, that Olivier also run
tests that showed no change. May be George's tests were on single state?

-- 
Totus tuus, Glebius.