From owner-freebsd-stable Fri Apr 19 10:16:13 2002 Delivered-To: freebsd-stable@freebsd.org Received: from D00015.dialonly.kemerovo.su (www2.svzserv.kemerovo.su [213.184.65.86]) by hub.freebsd.org (Postfix) with ESMTP id 9AEA437B417 for ; Fri, 19 Apr 2002 10:16:05 -0700 (PDT) Received: (from eugen@localhost) by D00015.dialonly.kemerovo.su (8.12.2/8.12.2/Submit) id g3JGN31N000227 for stable@freebsd.org; Sat, 20 Apr 2002 00:23:03 +0800 (KRAST) Date: Sat, 20 Apr 2002 00:23:03 +0800 From: Eugene Grosbein To: stable@freebsd.org Subject: ata performance degradation & msdosfs Message-ID: <20020420002303.A213@grosbein.pp.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi! My 4.5-STABLE (15 Apr 2002) has a problem writing to msdosfs: I try 'dd if=/dev/zero of=/dos/c/temp bs=1m' and get 350K/s, dd spends much time in 'wdrain' state. I have also 5.0-DP1 installed in the next slice and it has not this problem: I get >7.5Mb/s for massive writing to msdosfs. This system has Iwill BD100+ motherboard, ata33 controller: atapci0: port 0xf000-0xf00f at device 7.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 FreeBSD slices reside on IBM 40G hard drive, msdosfs lives on WD 6.4 hard drive: ad0: 6149MB [13328/15/63] at ata0-master UDMA33 ad2: 39266MB [79780/16/63] at ata1-master UDMA33 acd0: CDROM at ata0-slave PIO4 acd1: CD-RW at ata1-slave UDMA33 Mounting root from ufs:/dev/ad2s1a No activity on acd[01] while testing, the system is idle. Feel free to ask more information, I'd like help to resolve this. I've seen large performance degradation while writing to msdosfs some times before. This effect appeared and disappeared several times during 4-STABLE lifetime. Some time ago I've seen 30K/s writing speed and general system lockups while writing using some other hardware with more early 4-STABLE. And that was msdosfs issue, too. Eugene Grosbein To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message