From owner-freebsd-questions Thu Apr 24 13:19:42 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id NAA28501 for questions-outgoing; Thu, 24 Apr 1997 13:19:42 -0700 (PDT) Received: from tornado.cisco.com (tornado.cisco.com [171.69.104.22]) by hub.freebsd.org (8.8.5/8.8.5) with SMTP id NAA28496 for ; Thu, 24 Apr 1997 13:19:38 -0700 (PDT) Received: from bmcgover-pc.cisco.com (bmcgover-pc.cisco.com [171.69.104.147]) by tornado.cisco.com (8.6.12/8.6.5) with ESMTP id QAA22980 for ; Thu, 24 Apr 1997 16:14:06 -0400 Received: from bmcgover-pc.cisco.com (localhost.cisco.com [127.0.0.1]) by bmcgover-pc.cisco.com (8.8.5/8.8.5) with ESMTP id QAA04622 for ; Thu, 24 Apr 1997 16:19:06 -0400 (EDT) Message-Id: <199704242019.QAA04622@bmcgover-pc.cisco.com> To: questions@freebsd.org Subject: Making clists bigger... Date: Thu, 24 Apr 1997 16:19:06 -0400 From: Brian McGovern Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk I was wondering how one goes about adjusting the size of driver clists, or whether this is done automatically. I'm working on a serial card with a 2KB transmit buffer, and a 4-8KB receive buffer. I remember reading that clists throttle themselves around 1KB. I'd like to be able to generate clists that are roughly between 1 and 4 times the hardware buffer sizes, so that we can reduce the number of I/O operations to the board (ie - be able to do one 2KB transfer, rather than 2 1KB transfers). Thanks for your help. -Brian