From owner-freebsd-hackers Sun Dec 12 15: 7: 2 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from alpo.whistle.com (alpo.whistle.com [207.76.204.38]) by hub.freebsd.org (Postfix) with ESMTP id 7398014DB2 for ; Sun, 12 Dec 1999 15:06:59 -0800 (PST) (envelope-from julian@whistle.com) Received: from current1.whiste.com (current1.whistle.com [207.76.205.22]) by alpo.whistle.com (8.9.1a/8.9.1) with ESMTP id PAA92085; Sun, 12 Dec 1999 15:06:56 -0800 (PST) Date: Sun, 12 Dec 1999 15:06:54 -0800 (PST) From: Julian Elischer To: mauzi@poli.hu Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: silo overflows In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sun, 12 Dec 1999, Gergely EGERVARY wrote: > > what kind of disk to you have? and the chipset? (this may seem irrelevant > > but misconfigured DMA devices can block the cpu for long enough to cause > > this sort of thing in some cases). ALSO check systat -vmstat while this > > is happenning and check that you don't have a source of spurious > > interrupts. > > > > Julian > > intel 440bx chipset (abit-bh6 mainboard) > quantum cx13.0a ata4 disk > > actually i don't see any spurious interrupts :) (that had happenned to me) If you can get the disk working right it may even solve the silo problem. (it did for me) It turned out that the disk system was blocking the PCI bus during DMA Julian > > anyway... the raw disk read access speed (not fs!) is about 3MB/sec > this disk reads more than 10MB/secs with other OS'es... Do you have UDMA turned on? > > any ideas? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message