From owner-freebsd-performance@FreeBSD.ORG Fri Nov 19 03:21:36 2004 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D0D4B16A4CE for ; Fri, 19 Nov 2004 03:21:36 +0000 (GMT) Received: from web41205.mail.yahoo.com (web41205.mail.yahoo.com [66.218.93.38]) by mx1.FreeBSD.org (Postfix) with SMTP id 75C4843D2F for ; Fri, 19 Nov 2004 03:21:36 +0000 (GMT) (envelope-from arne_woerner@yahoo.com) Received: (qmail 89882 invoked by uid 60001); 19 Nov 2004 03:21:36 -0000 Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; b=ROpLo9A244D6PnqRGsyHRIOQl5PRBny9Qyt9y5qVWnEQQeJ1CU6eK1xSy4oJsohHWqh5W+jtVhKQ1svTXtKjyB5C4r4hjPVwmk5T3g0OWMsLxpnYIjl1vtjltmHWhKNoVX+Rnbn8X2glIoOO8mcsAqflHjm70eJX9EJD4JqFfBU= ; Message-ID: <20041119032135.89880.qmail@web41205.mail.yahoo.com> Received: from [83.129.203.165] by web41205.mail.yahoo.com via HTTP; Thu, 18 Nov 2004 19:21:35 PST Date: Thu, 18 Nov 2004 19:21:35 -0800 (PST) From: Arne "Wörner" To: Luke In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii cc: freebsd-performance@freebsd.org Subject: Re: I've ran out of ideas X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Nov 2004 03:21:36 -0000 --- Luke wrote: > On Thu, 18 Nov 2004, Arne Wörner wrote: > > Hmm... Since /dev/zero delivers on my box about 100-300MByte/sec > > (100Mbyte/sec for 512byte block size), it looks like your network driver > > hinders the throughputting proceedings (I assume, that your other > > network devices can handle 90Mbit/sec; no ethernet collisions, no > > concurrency, ...). Are you sure, that Linux performs better in the same > > setting? > > I think you must mean Mbps, not MBps. If it were bytes, you would be > saturating 2.5 gigabit links with a single connection. Not to mention > most PCI busses. > neo# dd if=/dev/zero of=/dev/null bs=512k count=1000 1000+0 records in 1000+0 records out 524288000 bytes transferred in 1.475860 secs (355242396 bytes/sec) I meant /dev/zero, which does not use PCI or so (it just produces zeros; that's why it is so fast). Just the bus between processor and main memory, I think... With my 133MHz FSB(?) my DDRAM can do 8Gbit/sec??? I am not so good in such things... Looks like each byte gets copied three times before it reaches /dev/null... Does somebody agree? Maybe my contributions are too weird and misleading, but I do not see, that they are technically wrong. -Arne __________________________________ Do you Yahoo!? Meet the all-new My Yahoo! - Try it today! http://my.yahoo.com