From owner-freebsd-current@FreeBSD.ORG  Wed Jun 16 06:43:14 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id A7D8116A4CE; Wed, 16 Jun 2004 06:43:14 +0000 (GMT)
Received: from fledge.watson.org (fledge.watson.org [204.156.12.50])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 52D3A43D39; Wed, 16 Jun 2004 06:43:14 +0000 (GMT)
	(envelope-from robert@fledge.watson.org)
Received: from fledge.watson.org (localhost [127.0.0.1])
	by fledge.watson.org (8.12.11/8.12.11) with ESMTP id i5G6fmJx085048;
	Wed, 16 Jun 2004 02:41:49 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Received: from localhost (robert@localhost)i5G6fmud085045;
	Wed, 16 Jun 2004 02:41:48 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Date: Wed, 16 Jun 2004 02:41:48 -0400 (EDT)
From: Robert Watson <rwatson@freebsd.org>
X-Sender: robert@fledge.watson.org
To: Julian Elischer <julian@elischer.org>
In-Reply-To: <Pine.NEB.3.96L.1040616014951.75630L-100000@fledge.watson.org>
Message-ID: <Pine.NEB.3.96L.1040616024014.75630N-100000@fledge.watson.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: freebsd-threads@freebsd.org
cc: mike <mike@mike2k.com>
cc: freebsd-current@freebsd.org
Subject: Re: Possible Threading problem with -CURRENT / MySQL?
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 16 Jun 2004 06:43:14 -0000


On Wed, 16 Jun 2004, Robert Watson wrote:

> On Wed, 16 Jun 2004, Robert Watson wrote:
> 
> > Netperf-UP-giant                4902.41    14.3
> > Netperf-SMP-giant               2566.18    16.83
> > Netperf-UP-mpsafe               4799.35    22.04
> > Netperf-SMP-mpsafe              3022.51    18.06
> 
> FYI, when I add ADAPTIVE_MUTEXES on this box, the mean of 3000 q/s goes
> to 4000 q/s on the netperf+smp+mpsafenet number.
> 
> I'm off to bed now, but it seems like (at least in the HTT
> configuration), it makes a big difference.  I'll run the remainder of
> that set with ADAPTIVE_MUTEXES tomorrow as well. 

And switching to 4BSD from ULE takes the mean to 6426 q/s when combined
with netperf, smp, debug.mpsafenet=1, and adaptive mutexes. 

(Keeping in mind that this mysql benchmark is basically an
inter-thread/process kernel IPC benchmark using UNIX domain sockets, since
the workload is fairly minimal in userspace, this makes reasonable sense).

Now I'm really going to bed. 

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Senior Research Scientist, McAfee Research