From owner-freebsd-hackers@FreeBSD.ORG Thu Jul 21 17:49:35 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 4DA4716A420 for ; Thu, 21 Jul 2005 17:49:35 +0000 (GMT) (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 A5C9943D82 for ; Thu, 21 Jul 2005 17:49:09 +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 ; 21 Jul 2005 18:49:08 +0100 (BST) To: Sam Pierson In-reply-to: Your message of "Thu, 21 Jul 2005 11:01:07 CDT." X-Request-Do: Date: Thu, 21 Jul 2005 18:49:08 +0100 From: David Malone Message-ID: <200507211849.aa11934@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 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 17:49:35 -0000 > 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 = retry?) Thanks, CWmin is a setting that controls the random delay before packets are transmitted. Search for tqi_cwmin in the driver. The retry limit says how many times the MAC should retry if it gets a collision while trying to transmit - I think it is controled by the tqi_shretry and tqi_lgretry values. In the driver in 6.X you can (in principle) set these values at the time the transmit queues are configured. David.