From owner-freebsd-hackers@FreeBSD.ORG Thu Jul 21 16:01:33 2005 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 28B5B16A41F for ; Thu, 21 Jul 2005 16:01:33 +0000 (GMT) (envelope-from samuel.pierson@gmail.com) Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.192]) by mx1.FreeBSD.org (Postfix) with ESMTP id AC7EC43D45 for ; Thu, 21 Jul 2005 16:01:32 +0000 (GMT) (envelope-from samuel.pierson@gmail.com) Received: by wproxy.gmail.com with SMTP id 71so262989wri for ; Thu, 21 Jul 2005 09:01:32 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=ZVSJkVRYEeo5Bn/QJS8hrf9Pny/ZMcRr2UX2j3ZBDiJyqPcm0XnnqZt/gEkCRvewrXvSdNrq65hVCBadFnlEEYOz1P+BDiskCikJv7Bv+7crvKA+Ew71DoT7HxQL4pGGiiKd67T17+kxOcHX3V8P64zuaI/tUl16dWqGuec6F18= Received: by 10.54.13.67 with SMTP id 67mr574369wrm; Thu, 21 Jul 2005 09:01:07 -0700 (PDT) Received: by 10.54.144.1 with HTTP; Thu, 21 Jul 2005 09:01:06 -0700 (PDT) Message-ID: Date: Thu, 21 Jul 2005 11:01:07 -0500 From: Sam Pierson To: David Malone In-Reply-To: <200507211647.aa79456@salmon.maths.tcd.ie> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <200507211647.aa79456@salmon.maths.tcd.ie> Cc: FreeBSD Hackers Subject: Re: Atheros, hardware access layer, collisions X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Sam Pierson List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Jul 2005 16:01:33 -0000 > OK - you can probably achieve that by setting the retry limit to > be 1, setting CWmin to be very small.=20 I was looking for this in the ah.h and the ah_desc.h files. Are they someplace else, or maybe this is a system call? I can't find anything about the retry limit (<-- CWmin =3D retry?) Thanks, Sam >However, you'll need to make > sure that both machines transmissions are synchronised to better > than 20us (which is no mean feat), otherwise carrier sense will > foil your plan! >=20 > David. >