From owner-freebsd-hardware@FreeBSD.ORG Sun May 11 05:37:52 2003 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7837D37B401 for ; Sun, 11 May 2003 05:37:52 -0700 (PDT) Received: from users.757.org (users.757.org [216.54.62.141]) by mx1.FreeBSD.org (Postfix) with ESMTP id BF1F743FA3 for ; Sun, 11 May 2003 05:37:51 -0700 (PDT) (envelope-from telmnstr@757.org) Received: from users.757.org (localhost [127.0.0.1]) by users.757.org (8.12.5/8.12.5) with ESMTP id h4BCcjZk005727 for ; Sun, 11 May 2003 08:38:45 -0400 (EDT) (envelope-from telmnstr@757.org) Received: from localhost (telmnstr@localhost) by users.757.org (8.12.5/8.12.5/Submit) with ESMTP id h4BCcjEh005724 for ; Sun, 11 May 2003 08:38:45 -0400 (EDT) X-Authentication-Warning: users.757.org: telmnstr owned process doing -bs Date: Sun, 11 May 2003 08:38:45 -0400 (EDT) From: Ethan To: freebsd-hardware@freebsd.org Message-ID: <20030511083305.Q5699-100000@users.757.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: IRQ sharing and lots of Soundcards? X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 11 May 2003 12:37:52 -0000 Hello all, I'm currently involved in a project where we stream about 12 local public service audio feeds onto the internet. We currently use 4 HP computers each with 3 soundcards and FreeBSD. It works fairly well, but we plan to add another 12 or so streams (if not 20+ more!) I just purchased two single board computer systems. Each one has the motherboard on a card (standard CTI/Telephony fare) with a backplane card that has 16 PCI slots. The computer will have a small IDE disk, a network interface, and lots of sound cards. IRQ conflicts... can PCI really share IRQs? And can it share them when the cards are actively "generating requests"? The sound cards are Sound Blaster 128 PCI's, which are base model cards (no game ports!). At minimum we could probably get 6 sound cards per machine, but it would be AWESOME to be able to shove 12 of them in each box.... is PCI that good, or am I still limited by the same factors that gave me headaches when putting a Sound Blaster 1.0 in a Tandy 1000sx? Also, the board says it has two PCI busses. One is tied to 2 PCI slots, one is tied to 14 slots. *NO* idea how that works. Much thanks. If I could just get the software developers to add support for splitting left and right audio into separate feeds :-( -- Ethan