Date: Wed, 23 Jan 2002 12:53:27 -0500 From: Brian McGovern <mcgovern@spoon.beta.com> To: Lars Erik Gullerud <lerik@kq.no> Cc: qa@freebsd.org Subject: Re: 4.5-RC2 kernel, m_clalloc failed Message-ID: <200201231753.g0NHrR912181@spoon.beta.com> In-Reply-To: Your message of "23 Jan 2002 15:58:52 %2B0100." <1011797933.75400.19.camel@elmer.i.eunet.no>
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Just one other datapoint... My 768MB 1.2GHz Athlon, set with maxusers to 64, had 1536 available under 4.4. So, therefore, based on your ~8600 value, the system tuned itself to far more than 64 users. -Brian > I moved one of our shoutcast streaming servers over to 4.5-RC2 during > the weekend to test it in a high network load environment. It was > installed "fresh" on a clean system with an FTP install, i.e. not an > upgrade from the old 4.4 install. > > After being in operation for just a few hours the server started logging > these messages continously: > > Jan 23 14:34:41 disrv01 /kernel: m_clalloc failed, consider increase > NMBCLUSTERS value > Jan 23 14:34:41 disrv01 /kernel: fxp0: cluster allocation failed, packet > dropped! > Jan 23 14:34:42 disrv01 last message repeated 850 times > > The server had to be rebooted in order to function properly again, > network connectivity was basically gone until it was rebooted. After > reboot it again functioned for a few hours and then the same thing > happened. > > The server is running 5 instances of the shoutcast server (original > sc_serv binary from shoutcast, not icecast) on 5 separate TCP ports. The > load had been steady between 400 and 500 concurrent TCP streams @ > 128kbit for the whole 24 hours, and was at apx. 450 streams served when > this error hit. Nothing else is running on this server. > > Kernel was recompiled for this machine after install, so not a GENERIC > kernel, maxusers was set to 0 to test the auto-allocation. The > NMBCLUSTERS as reported in kern.ipc.nmbclusters=8640. This is a P3-800 > 512MB RAM box, who has been running steadily at a lot higher loads than > this for a long time on 4.4-STABLE (750 streams max), so I'm assuming > it's an issue introduced in 4.5. Unless it's just my stupidity and > something just needs to be configured differently - maybe I should avoid > the maxusers=0 and set some table sizes manually or something? > > I don't know what kind of info you might require, I'm not really much of > a "kernelhacker", but I hope you fix whatever the prob is before > 4.5-RELEASE or I'll have to stay on 4.4 for our streaming boxes. > > Regards, > Lars Erik Gullerud > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-qa" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-qa" in the body of the message
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