From owner-freebsd-current@FreeBSD.ORG  Thu Jul  2 11:49:36 2009
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id A75D9106564A
	for <current@freebsd.org>; Thu,  2 Jul 2009 11:49:36 +0000 (UTC)
	(envelope-from raj@semihalf.com)
Received: from smtp.semihalf.com (smtp.semihalf.com [213.17.239.109])
	by mx1.freebsd.org (Postfix) with ESMTP id 60F9D8FC1D
	for <current@freebsd.org>; Thu,  2 Jul 2009 11:49:36 +0000 (UTC)
	(envelope-from raj@semihalf.com)
Received: from [10.0.0.34] (cardhu.semihalf.com [213.17.239.108])
	by smtp.semihalf.com (Postfix) with ESMTPSA id B7DF6C3AAA
	for <current@freebsd.org>; Thu,  2 Jul 2009 13:30:55 +0200 (CEST)
Message-Id: <CCF0CF9D-BD46-4D85-9B99-BE6B54281899@semihalf.com>
From: Rafal Jaworowski <raj@semihalf.com>
To: current@freebsd.org
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Content-Transfer-Encoding: 7bit
Mime-Version: 1.0 (Apple Message framework v935.3)
Date: Thu, 2 Jul 2009 13:32:08 +0200
X-Mailer: Apple Mail (2.935.3)
Cc: 
Subject: MD5 test slowdown
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
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: Thu, 02 Jul 2009 11:49:36 -0000

I'm observing some heavy slowdown seen with md5 test on PowerPC:

1. On the MPC8572 machine with today's HEAD I'm getting:

# md5 -t
MD5 time trial. Digesting 100000 10000-byte blocks ... done
Digest = 766a2bb5d24bddae466c572bcabca3ee
Time = 36.930565 seconds
Speed = 27077842.000000 bytes/second

2. While a couple of months back it yielded 6x shorter times on this  
very same hardware, like this one:

# md5 -t
MD5 time trial. Digesting 100000 10000-byte blocks ... done
Digest = 766a2bb5d24bddae466c572bcabca3ee
Time = 6.027277 seconds
Speed = 165912400.000000 bytes/second

Timers work fine, the slowdown is real. I don't know if this is  
PowerPC related, and was wondering if anybody observed something  
similar on other archs perhaps? Any suggestions what could be causing  
this or where to look? I cannot see immediate suspects in the arch/ 
platform code.

Rafal