Date: Tue, 11 May 1999 11:41:10 +0300 From: Ruslan Ermilov <ru@ucb.crimea.ua> To: David Greenman <dg@freebsd.org>, Bruce Evans <bde@freebsd.org> Cc: FreeBSD Hackers <hackers@freebsd.org> Subject: CY_PCI_FASTINTR (Was: Re: Cyclom-Y driver for FreeBSD - help!!!) Message-ID: <19990511114110.A13954@relay.ucb.crimea.ua> In-Reply-To: <199806232329.QAA22367@implode.root.com>; from David Greenman on Tue, Jun 23, 1998 at 04:29:46PM -0700 References: <19980623163735.A3881@ucb.crimea.ua> <199806232329.QAA22367@implode.root.com>
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On Tue, Jun 23, 1998 at 04:29:46PM -0700, David Greenman wrote: > A couple of things: First, I'm not the person maintaining the driver in > FreeBSD. All that I did was write the PCI front end to an existing driver. > Bruce Evans <bde@freebsd.org> is the maintainer of the Cyclades-Y driver, so > please talk to him about problems with it. Second, the issue with the lossage > with the PCI card is due to interrupt latency in the FreeBSD kernel and I > don't think this is something that will be easily fixed. The problem is > avoided with ISA due to Bruce's "fast" interrupt hacks, but unfortunately > this doesn't work with shared interrupts. > > -DG > > David Greenman > Co-founder/Principal Architect, The FreeBSD Project I saw the Bruce's commit (cy_pci.c,v 1.10 1999/01/15 10:00:12 bde). Am I understand this right: if I configure my PCI card to an exclusive interrupt, and then turn on CY_PCI_FASTINTR, I'll get rid of ``silo overflows'' on it. Just out of curiosity. What is the ``interrupt latency in the FreeBSD kernel'' problem and what are the ``Bruce's "fast" interrupt hacks''? TIA, -- Ruslan Ermilov Sysadmin and DBA of the ru@ucb.crimea.ua United Commercial Bank +380.652.247.647 Simferopol, Ukraine http://www.FreeBSD.org The Power To Serve http://www.oracle.com Enabling The Information Age To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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