Thread View: net.bugs.uucp
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Started by Keith Packard
Wed, 19 Mar 1986 05:25
uucp problems solved with hardware
Author: Keith Packard
Date: Wed, 19 Mar 1986 05:25
Date: Wed, 19 Mar 1986 05:25
22 lines
1719 bytes
1719 bytes
To recap, I was having problems with uucp running on my PDP11/73 timing out when receiving data at 1200 baud from a vax running ultrix. The problem was identified as overrun errors in the dlv11-e card that I had attached to my modem, this card has no buffering for data at all. Overrun errors were occuring because 2.9BSD spends too much time at high priority handling disk i/o. I find it difficult to understand how it spends over 1/120 of a second at high spl handling such simple activity but it is the case. The solution I used was to get a dzv11. This solved the problem completely because it has a 16 character input silo which doesn't overflow. If anyone cares, I modified the dz11 driver to support dzv11 cards (which have only 4 ports per board) as well as make it support dialin and dialout on the same port (with correct interlocking). I realize that the original dz driver supported a device class that ignored carrier, my hacks are suitable for sites which want to use a given line for *both* dialin and dialout. Keith Packard ...!tektronix!reed!motel6!keith
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