Date: 16 Jan 2003 22:35:08 +0000 From: Stacey Roberts <stacey@vickiandstacey.com> To: Marco Beishuizen <marco@beishuizen.info> Cc: FreeBSD questions mailing list <questions@freebsd.org> Subject: Re: TX underrun Message-ID: <1042756507.51041.445.camel@localhost> In-Reply-To: <Pine.BSF.4.52.0301162317540.26941@tsunami.bsd> References: <Pine.BSF.4.52.0301162317540.26941@tsunami.bsd>
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Hi, On Thu, 2003-01-16 at 22:22, Marco Beishuizen wrote: > Hi, > > Recently, I noticed a kernel message on one of my machines: > > dc0: TX underrun -- increasing TX threshold > > It doesn't seem to be very important. I'm just curious what it means. Does > anyone know what it means? This is a message that appears (usually from the box running under high system load) when a system is having a problem getting data to the nic fast enough. Some nic's have the ability to actually start sending a packet *before* the packet has been completely received, and the message informs you that a transmit (the "tx") underrun occurred where the rest of the packet data wasn't actually "there" when the nic was ready to send it. Nothing to worry about, but either reducing system load .., or buying a more efficient nic would see these messages off. Hope this helps. Regards, Stacey > > Thanks, > > Marco -- Stacey Roberts B.Sc (HONS) Computer Science Web: www.vickiandstacey.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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