From owner-freebsd-current Mon Aug 17 10:16:48 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA03173 for freebsd-current-outgoing; Mon, 17 Aug 1998 10:16:48 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from rah.star-gate.com (rah.star-gate.com [209.133.7.234]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA03162 for ; Mon, 17 Aug 1998 10:16:43 -0700 (PDT) (envelope-from hasty@rah.star-gate.com) Received: from rah.star-gate.com (localhost.star-gate.com [127.0.0.1]) by rah.star-gate.com (8.8.8/8.8.8) with ESMTP id KAA12329; Mon, 17 Aug 1998 10:15:47 -0700 (PDT) (envelope-from hasty@rah.star-gate.com) Message-Id: <199808171715.KAA12329@rah.star-gate.com> X-Mailer: exmh version 2.0.2 2/24/98 To: Alfred Perlstein cc: Paul van der Zwan , current@FreeBSD.ORG Subject: Re: Cards sharing irq's on PCI bus In-reply-to: Your message of "Mon, 17 Aug 1998 10:11:10 CDT." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 17 Aug 1998 10:15:47 -0700 From: Amancio Hasty Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > well, that's unclear, last i heard linux was the only OS to support shared > IRQs and i don't even know how well it handled it. (i think it was more of > a "don't use them at the same time" deal) Nah, I have shared IRQs for instance one of the options in the Bt848 driver is to specify the IRQ and I have shared the IRQ of up to 3 bt848 cards. In the process I discovered others that were doing the same thing. Cheers, Amancio > but, you can twiddle your bios to give more IRQs to PCI/pnp devices, look > around in it, you should be able to switch IRQ reservations from something > like "LEGACY ISA" to "PCI/pnp" > > (perhaps you used all of your IRQs, but i did this to give my PCI system > more IRQs because too many were reserved for ISA) > > Alfred Perlstein - Programmer, HotJobs Inc. - www.hotjobs.com > -- There are operating systems, and then there's BSD. > -- http://www.freebsd.org/ > > On Mon, 17 Aug 1998, Paul van der Zwan wrote: > > > I am running very low on available irq's and I noticed that the bios put both > > my SMC 8432BT and my Adaptec 2740 on irq 9. Network performance was terrible, > > iozone on NFS only 300kB/s. After disabling my IDE controller (only need that > > when running Solaris) the Adaptrec was put on irq 14 (where the IDE used to be) > > and my network performance was back ( more than 900kB/s). > > > > Is it allowed to put have more than one PCI card use the same irq ??? > > It sort of worked. No errors or so, just lousy performance ?? > > Maybe someone can shed some light on this ?? > > > > > > Paul > > -- > > Paul van der Zwan paulz @ trantor.stuyts.nl > > "I think I'll move to theory, everything works in theory..." > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-current" in the body of the message > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message