David Lippke (LIPPKE%UTDALVM1.BITNET@CUNYVM.CUNY.EDU)
Fri, 08 Jul 88 23:33:47 CDT
We've recently put some effort into benchmarking various combinations of
TCP/IP software and ethernet controllers on IBM mainframes running VM.
The results of this testing have now been analyzed to death and we're
preparing for a second series of tests later this year.
Most of the performance problems of the current software/hardware in this
area are related to a long latency from packet reception to the processing
of that packet by the software (i.e., this latency tends to be much
greater than the transmit-commit to network latency).
I'm currently trying to quantify the effect that cutting one latency or
another will have on TCP performance. I think I may be homing in on
some decent conclusions and I plan on creating some live tests,
but it would be much easier to try out my theories if I had access
to some software which would simulate two interconnected TCPs.
I'm not after anything too complex; something that will simulate a single
established connection and let me adjust various parameters would be a
useful starting point.
Anyone have something even remotely applicable?
The University of Texas at Dallas
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