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From: ggvvgg@mixcom.COM (Dave Fenske)
Newsgroups: comp.unix.questions
Subject: Read and Flow Control
Message-ID: <433@mixcom.COM>
Date: 28 Mar 91 04:17:33 GMT
Article-I.D.: mixcom.433
Organization: MIX Communications, Milwaukee, WI (Public access Usenet, Email)
Lines: 19


Assume one opens a tty port and does a low-level read on that port, reading
just one character at a time.

The question is: Does the operating system assert flow control (either X-on
or RTS/CTS)?

The problem I'm running into is that there appears to be a problem when the
computer gets very busy and cannot keep up with incoming data (9600 baud).

BTW, this is via a Computone AT-8 on an AT clone under Xenix 2.3.2.

I've already increased the receive buffers on the computone, quadrupled
NCLIST, and up-ed (nice) the priority of the process that's doing the
reading.

Any ideas?

Dave Fenske   (...uunet!mixcom.com!ggvvgg)