Subject: Re: network performance
To: David Carrel <carrel@cisco.com>
From: Brad "ADB Guy" Grantham <grantham@netcom.com>
List: port-hp300
Date: 07/14/1994 16:32:06
David Carrel writes:
> I started out testing throughput on my slip link. I am using ttcp (a tcp
> test program). When sending data TO my machine over a 28.8 modem with DTE
> set to 38.4 (the max on the hp300), I see transfer rates of around
> 3.62KBytes/s (~=36Kbaud). Pretty nice! (Obviously I am getting good
> compression in the modem.) But when I tried reversing the direction
> (sending FROM my NetBSD machine) my transfer rate dropped to .97KB/s (close
> to one fourth).
I had a similar problem under NetBSD/Mac68k, and I discovered that my modem
was set for XON/XOFF, although the serial connection was configured for
hardware flow control. I forget what the command was on my modem, but once
I configured it for RTS/CTS (or whatever that is), SL/IP started working
wonderfully.
> I tried a similar test over my ethernet, and I noticed about a 10% drop
> when sending versus receiving.
But then, of course, my problem may have nothing to do with yours...
-Brad
--
'1' means a BLACK pixel, '1' means button UP, what will Apple think of next?
Brad Grantham, grantham@netcom.com >+------+< Happily slaved to NetBSD/Mac68k!
I thought I would have to go without dinner tonight until I
remembered the container of chocolate frosting in the fridge!
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