From: Homan, Charles (NE) (Charles.Homan@GDC4S.Com)
Date: Fri May 09 2003 - 09:20:22 EDT
Greetings, colleagues,
I have a user who wants to tweak his serial port receive buffer "trigger
point" on a SunBlade 100 running Solaris 8. I'm sort of assuming this is
possible - even *I* know how to do it on Windows, and that is saying
something... ;-) Unfortunately, I can't find any info on how to go about it,
so now I'm starting to wonder if it is indeed possible. I guess I'm also
assuming that Sun serial ports work the same as PC serial ports - that is,
that they collect a certain amount of data in a small buffer and then signal
the processor with an interrupt to come and get the data. I have no idea if
that is a correct assumption or not.
Some background: The user is developing an application using PPP over the
serial port between two SunBlades. The line is connected by two long-haul
modems which could theoretically be miles apart, but in the lab are about 10
feet apart. They are trying to FTP over the line, and are seeing 2 minute
breaks in the connection. That is, FTP transfers some data, stops for two
minutes, transfers a little more, stops for two more minutes, etc. I have
to admit that I am not really involved in the diagnosis of this problem, but
they believe that tweaking the receive buffer will help them out, and I
would like to be able to tell them how to do that.
Any help would be appreciated. In the immortal words of Jean Claude van
Damme, "Teach me." :-)
Thanks,
/charles
ObDisclaimer: These comments are mine and don't necessarily reflect the
views of my employers.
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