Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!emory!att!pacbell.com!pacbell!sactoh0!unify!longbow!ttank!tts From: tts@ttank.ttank.com (Karl Bunch) Newsgroups: comp.unix.aix Subject: Serial (UUCP) I/O under AIX PS/2 V 1.2 Summary: Slow Message-ID: <1991Feb26.060049.7598@ttank.ttank.com> Date: 26 Feb 91 06:00:49 GMT Reply-To: karl@ttank.com Organization: Think Tank Software, Norwalk, CA Lines: 22 I'm new to the AIX world, but with 7 years of Unix experiance behind me. We have a 386 Box running SCO Xenix (with FAS drivers and FIFO serial chips) connected to a Model 8580-311 (8Mb mem, 300Mb disk) via the built-in serial port (tty0). Via uucp at 19200 baud from the AIX -> SCO Xenix box best through put is about 820cps. From the SCO Xenix box -> AIX we are lucky to get over 700 cps. Am I missing something here? Is the serial driver that bad? Xon/Xoff isn't being ran on the port as far as I can tell etc. It just seems to running terribly slow. I know the primary serial port is going to be interrupting the system to death but we have put to Unix boxes back to back at 38400 and at least got 2900cps etc. And NOTHING else is running on either box while we're running these tests. Anway, any hints would be great, Thanks Karl -- % ---------------------------------------------------------------------------- % Karl Bunch ||| UUCP: ..!uunet!zardoz!ttank!karl % Think Tank Software ||| INTERNET: karl@ttank.com % "...you'd be suprised how far a hug will go with Geordi, even Worf!" -- Riker Brought to you by Super Global Mega Corp .com