From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from snark.thyrsus.com (static-71-162-243-5.phlapa.fios.verizon.net [71.162.243.5]) by huchra.bufferbloat.net (Postfix) with ESMTP id 527782011CD for ; Mon, 12 Mar 2012 18:31:31 -0700 (PDT) Received: by snark.thyrsus.com (Postfix, from userid 1000) id E679740617; Mon, 12 Mar 2012 21:31:14 -0400 (EDT) Date: Mon, 12 Mar 2012 21:31:14 -0400 From: "Eric S. Raymond" To: Dave Taht Message-ID: <20120313013114.GB18695@thyrsus.com> References: <20120312220623.GB18256@thyrsus.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Eric Conspiracy Secret Labs X-Eric-Conspiracy: There is no conspiracy User-Agent: Mutt/1.5.21 (2010-09-15) Cc: thumbgps-devel@lists.bufferbloat.net Subject: Re: [Thumbgps-devel] the serial alternative/radio noise X-BeenThere: thumbgps-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list Reply-To: esr@thyrsus.com List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Mar 2012 01:31:31 -0000 Dave Taht : > On Mon, Mar 12, 2012 at 4:22 PM, Dave Taht wrote: > > >> I have observational evidence that we have problems with many kinds of > >> hardware and the cause is undefined, and varies by manufacturer. > > A better way to put my question is: what evidence do we have that a > PPS signal over usb can provide better time? You pointed me at it yourself. The guy who measured 50us jitter on a Windows machine. You should re-post that link here for the record and so others can use it. -- Eric S. Raymond