Date: Thu, 10 Jun 1999 12:35:36 -0700 (PDT) From: Doug White <dwhite@resnet.uoregon.edu> To: freebsd-net@freebsd.org Subject: znyx don't adjust TX thresh? Message-ID: <Pine.BSF.4.03.9906101226450.27854-100000@resnet.uoregon.edu>
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Hello!
We have two ZNYX ZX314 boards in a FreeBSD 2.2.8-based router. This
system is the main router for one of our POPs. It continually spews
de0: abnormal interrupt: transmit underflow
and doesn't appear to be fixing itself anytime soon. We have other
de-driven (SMC & Netgear) boards in 2.2 and 3.X boxen and they simply
mention they're adjusting the transmith threshhold and stop whining.
tulip_print_abnormal_interrupt() makes this check:
if (mask == TULIP_STS_TXUNDERFLOW && (sc->tulip_flags &
TULIP_NEWTXTHRESH)) {
sc->tulip_flags &= ~TULIP_NEWTXTHRESH;
if (sc->tulip_cmdmode & TULIP_CMD_STOREFWD) {
printf(" (switching to store-and-forward mode)");
} else {
printf(" (raising TX threshold to %s)",
&thrsh[9 * ((sc->tulip_cmdmode &
TULIP_CMD_THRESHOLDC
TL) >> 14)]);
}
}
For some reason this isn't being followed.
In addition, during the znyx media probe:
TULIP_CSR_WRITE(sc, csr_command,
TULIP_CSR_READ(sc, csr_command) & ~TULIP_CMD_TXTHRSHLDCTL);
This looks a bit ominous (turning off the TX thresh control?).
Do the Znyx cards not support adjusting the TX thresh, or is this some odd
bug? Unfortunately this is a production box so I can't go rebooting it
every hour, but I can make small adjustments. I'm going to disable the
relevant printf()s anyway, but I hope no packets are getting smashed in
the process.
Thanks for any hints/help/etc.
Doug White
Internet: dwhite@resnet.uoregon.edu | FreeBSD: The Power to Serve
http://gladstone.uoregon.edu/~dwhite | www.freebsd.org
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