From owner-freebsd-hackers Mon Jul 24 7:35:56 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from ifi.uio.no (ifi.uio.no [129.240.64.2]) by hub.freebsd.org (Postfix) with ESMTP id 9AFCD37B619 for ; Mon, 24 Jul 2000 07:35:51 -0700 (PDT) (envelope-from andreasd@ifi.uio.no) Received: from tyrfing.ifi.uio.no (3034@tyrfing.ifi.uio.no [129.240.64.16]) by ifi.uio.no (8.8.8/8.8.7/ifi0.2) with ESMTP id QAA10370 for ; Mon, 24 Jul 2000 16:35:48 +0200 (MET DST) Received: (from andreasd@localhost) by tyrfing.ifi.uio.no ; Mon, 24 Jul 2000 16:35:48 +0200 (MET DST) To: freebsd-hackers@freebsd.org Subject: Re: Funky scheduler stuff under heavy I/O. References: From: Andreas Dobloug X-Newsreader: Gnus v5.4.37/XEmacs 19.15 Date: 24 Jul 2000 16:35:48 +0200 In-Reply-To: Message-ID: Lines: 14 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG * Jaye Mathisen | 8 parallel DD's started at the same type creating 2GB cycbuffs (as fast as | & can put them in the background). (dd if=/dev/zero bs=1m count=2000 | of=blahblah) | | Any brilliant ideas? I've also experienced this on my scsi-drives (dual P2-350, adaptec2940u2w controller). When doing extensive writes, this always happens. The scan-rate (reported by vmstat) goes sky high, and the system becomes unresponsive. -- Andreas Dobloug : email: andreasd@ifi.uio.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message