From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Lameter Subject: Re: Low latency diagnostic tools Date: Thu, 6 Aug 2009 10:19:53 -0400 (EDT) Message-ID: References: <20090806094736.591b7086.lk-netdev@lk-netdev.nosense.org> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: netdev@vger.kernel.org To: Mark Smith Return-path: Received: from smtp3.ultrahosting.com ([74.213.175.254]:54094 "EHLO smtp.ultrahosting.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752183AbZHFOUK (ORCPT ); Thu, 6 Aug 2009 10:20:10 -0400 Received: from localhost (smtp.ultrahosting.com [127.0.0.1]) by smtp.ultrahosting.com (Postfix) with ESMTP id 59C8382CEA8 for ; Thu, 6 Aug 2009 10:41:32 -0400 (EDT) Received: from smtp.ultrahosting.com ([74.213.175.254]) by localhost (smtp.ultrahosting.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MezquXZcGixq for ; Thu, 6 Aug 2009 10:41:28 -0400 (EDT) Received: from gentwo.org (unknown [74.213.171.31]) by smtp.ultrahosting.com (Postfix) with ESMTP id CDA1C82CEA7 for ; Thu, 6 Aug 2009 10:41:25 -0400 (EDT) In-Reply-To: <20090806094736.591b7086.lk-netdev@lk-netdev.nosense.org> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, 6 Aug 2009, Mark Smith wrote: > This implementation of One Way Active Measurement Protocol might be of > interest: > > http://www.internet2.edu/performance/owamp/ It needs an accurate timesource. So it wont be of general use unless everyone adopts ptp or so. Latencies today are way below 100 microseconds which is not doable with the accuracy provided by ntp. > Some of the performance tuning parts of the README below would also be > useful in the Net area of the Linux Foundation wiki. Possibly the > "Testing" section could be changed to "Testing and Measurement" > > http://www.linuxfoundation.org/en/Net:Main_Page Ok. I will look at that.