Date: Mon, 17 Aug 1998 10:15:47 -0700 From: Amancio Hasty <hasty@rah.star-gate.com> To: Alfred Perlstein <bright@www.hotjobs.com> Cc: Paul van der Zwan <paulz@trantor.stuyts.nl>, current@FreeBSD.ORG Subject: Re: Cards sharing irq's on PCI bus Message-ID: <199808171715.KAA12329@rah.star-gate.com> In-Reply-To: Your message of "Mon, 17 Aug 1998 10:11:10 CDT." <Pine.BSF.3.96.980817100834.354D-100000@bright.fx.genx.net>
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> 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
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