Date: Thu, 6 Nov 2003 11:29:16 -0000 From: "Barry Byrne" <barry.byrne@wbtsystems.com> To: <freebsd-questions@freebsd.org> Subject: RE: TX Threshold & TX Underrun ??? Message-ID: <NCBBIAMNAKDKFJIIGNPKIEAJOCAA.barry.byrne@wbtsystems.com> In-Reply-To: <BBCFED40.2074C%bsd@todoo.biz>
next in thread | previous in thread | raw e-mail | index | archive | help
> -----Original Message-----
> From: owner-freebsd-questions@freebsd.org
> [mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Greg Bernard
> Sent: 06 November 2003 11:21
> I have this message that has showed up in the "security run output"
>
> I don't really know what It means ?
>
> > backup.xxx.fr kernel log messages:
> >> dc0: TX underrun -- increasing TX threshold
> Any idea ?
man 4 dc
dc%d: TX underrun -- increasing TX threshold The device generated a
transmit underrun error while attempting to DMA and transmit a packet.
This happens if the host is not able to DMA the packet data into the
NIC's FIFO fast enough. The driver will dynamically increase the
trans-
mit start threshold so that more data must be DMAed into the FIFO
before
the NIC will start transmitting it onto the wire.
Don't think you should be too concerned about this.
- Barry
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?NCBBIAMNAKDKFJIIGNPKIEAJOCAA.barry.byrne>