From owner-cvs-src@FreeBSD.ORG Tue Jul 25 00:03:02 2006 Return-Path: X-Original-To: cvs-src@FreeBSD.org Delivered-To: cvs-src@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5794E16A4E0; Tue, 25 Jul 2006 00:03:02 +0000 (UTC) (envelope-from dwmalone@maths.tcd.ie) Received: from salmon.maths.tcd.ie (salmon.maths.tcd.ie [134.226.81.11]) by mx1.FreeBSD.org (Postfix) with SMTP id D532943D55; Tue, 25 Jul 2006 00:02:59 +0000 (GMT) (envelope-from dwmalone@maths.tcd.ie) Received: from walton.maths.tcd.ie ([134.226.81.10] helo=maths.tcd.ie) by salmon.maths.tcd.ie with SMTP id ; 24 Jul 2006 18:38:46 +0100 (BST) To: "Christian S.J. Peron" In-reply-to: Your message of "Mon, 24 Jul 2006 10:51:20 CDT." <44C4EC78.8060401@FreeBSD.org> Date: Mon, 24 Jul 2006 18:38:20 +0100 From: David Malone Message-ID: <200607241838.aa38962@salmon.maths.tcd.ie> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/net bpf.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Jul 2006 00:03:02 -0000 > Thanks for taking care of this! It is not very desirable for the same > packet to have different timestamps associated with it across different > bpf peers. It certainly could cause a problem if people are using > timestamps to correlate events from different programs on the same system. Indeed - calling microtime more than necessary and generating inconsistent timestamps just didn't seem good. I think jkim@ has interesting work related to this that might allow us to exploit hardware that does hardware timestamping of packets. It is some way down the road though. David.