From owner-cvs-src@FreeBSD.ORG  Wed Oct 29 08:10:45 2003
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 63F2416A4EC; Wed, 29 Oct 2003 08:10:45 -0800 (PST)
Received: from mailhub.fokus.fraunhofer.de (mailhub.fokus.fraunhofer.de
	[193.174.154.14])	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 12EAC43FBD; Wed, 29 Oct 2003 08:10:42 -0800 (PST)
	(envelope-from brandt@fokus.fraunhofer.de)
Received: from beagle (beagle [193.175.132.100])h9TGAdP18042;
	Wed, 29 Oct 2003 17:10:39 +0100 (MET)
Date: Wed, 29 Oct 2003 17:10:39 +0100 (CET)
From: Harti Brandt <brandt@fokus.fraunhofer.de>
To: John Baldwin <jhb@FreeBSD.org>
In-Reply-To: <XFMail.20031029110236.jhb@FreeBSD.org>
Message-ID: <20031029170404.E72806@beagle.fokus.fraunhofer.de>
References: <XFMail.20031029110236.jhb@FreeBSD.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: cvs-src@FreeBSD.org
cc: src-committers@FreeBSD.org
cc: cvs-all@FreeBSD.org
Subject: RE: cvs commit: src/sys/dev/hatm if_hatm.c if_hatm_intr.c
	if_hatmvar.h
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: Hartmut Brandt <harti@FreeBSD.org>
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 29 Oct 2003 16:10:45 -0000

On Wed, 29 Oct 2003, John Baldwin wrote:

JB>
JB>On 29-Oct-2003 Hartmut Brandt wrote:
JB>> harti       2003/10/29 04:59:44 PST
JB>>
JB>>   FreeBSD src repository
JB>>
JB>>   Modified files:
JB>>     sys/dev/hatm         if_hatm.c if_hatm_intr.c if_hatmvar.h
JB>>   Log:
JB>>   Get rid of the mutexes for the exernal buffer free lists. Use
JB>>   atomic instructions instead. Remove the stuff used to track
JB>>   whether an external mbuf travels through the system. This is
JB>>   temporary only and will come back soon.
JB>
JB>Do the atomic operations buy you significant performance?

Yes. I'm trying to receive and send around 150kpkt/sec. Up to now it
stopped at 120kpkts because the (2-CPU) machine was 50% in interrupt
state. Now I'm up to 180kptks with around 45%. I'm not sure how much of
this is due to getting rid of the mutexes, but I may have to try it with
the mutexes because I got another mail that says, that the algorithm may
not be safe. I'll take a look.

harti
-- 
harti brandt,
http://www.fokus.fraunhofer.de/research/cc/cats/employees/hartmut.brandt/private
brandt@fokus.fraunhofer.de, harti@freebsd.org