Date: Mon, 12 Jan 2004 14:13:16 -0800 (PST) From: Doug White <dwhite@gumbysoft.com> To: Don Lewis <truckman@FreeBSD.org> Cc: current@FreeBSD.org Subject: Re: core-dumping over NFS Message-ID: <20040112141254.V54897@carver.gumbysoft.com> In-Reply-To: <200401122112.i0CLC87E034120@gw.catspoiler.org> References: <200401122112.i0CLC87E034120@gw.catspoiler.org>
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On Mon, 12 Jan 2004, Don Lewis wrote: > On 12 Jan, Mikhail Teterin wrote: > > > . 5.2-CURRENT (Dec 14) server, RedHat-9 client: > > core is created properly, but sometimes the server goes > > into a frenzy with the sys-component (bufdaemon) taking > > up the entire 100% of the CPU-time (P4 at 2GHz); it only > > writes @4Mb/s (~14% of the disk's bandwidth) and the > > only cure is to restart the /etc/rc.d/nfsd; trying to, > > for example, switch from X11 to a textual console, when > > this is happening reliably hangs the machine. > > I saw something similar a in the last month when running iozone on a > FreeBSD client with an nfs file system mounted from a FreeBSD server. I > think this was in the 5.2-BETA timeframe. The client typically ran out > of CPU first, but the server was not far behind. This happened in the > tests with the larger file and/or block sizes. Bufdaemon was typically > the big consumer of CPU. Hm, I can attempt to reproduce this on 5.2-rel or -current. Can you provide the options used to iozone? -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org
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