From owner-freebsd-hackers Tue May 11 1:42: 1 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from relay.ucb.crimea.ua (relay.ucb.crimea.ua [212.110.138.1]) by hub.freebsd.org (Postfix) with ESMTP id 4611315940; Tue, 11 May 1999 01:41:16 -0700 (PDT) (envelope-from ru@ucb.crimea.ua) Received: (from ru@localhost) by relay.ucb.crimea.ua (8.9.2/8.9.2/UCB) id LAA21131; Tue, 11 May 1999 11:41:10 +0300 (EEST) (envelope-from ru) Date: Tue, 11 May 1999 11:41:10 +0300 From: Ruslan Ermilov To: David Greenman , Bruce Evans Cc: FreeBSD Hackers Subject: CY_PCI_FASTINTR (Was: Re: Cyclom-Y driver for FreeBSD - help!!!) Message-ID: <19990511114110.A13954@relay.ucb.crimea.ua> Mail-Followup-To: David Greenman , Bruce Evans , FreeBSD Hackers References: <19980623163735.A3881@ucb.crimea.ua> <199806232329.QAA22367@implode.root.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.3i In-Reply-To: <199806232329.QAA22367@implode.root.com>; from David Greenman on Tue, Jun 23, 1998 at 04:29:46PM -0700 X-Operating-System: FreeBSD 3.1-STABLE i386 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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 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