Newsgroups: comp.sys.transputer
From: Efthimios.Tambouris@brunel.ac.uk (Efthimios Tambouris)
Subject: T805 + C004 = Help needed.
Organization: Brunel University, Uxbridge, UK
Date: Mon, 11 Apr 1994 17:17:02 GMT
Message-ID: <Co3uoG.Fx3@brunel.ac.uk>



Hi,
following the discussion on the performance of transputers I
would like to pose some questions:
1) suppose an interconnection of T805 via C004 switches. What
is the time required for two transputers to communicate? Is 
there a start-up cost and a per word cost? Is there any mesurement
for the values of these costs? or any benhmark to measure it?
2) suppose that the T805 are connected via C004 in a logical 2D 
mesh. Is there a performance measurement available for the one
to all personalised communication problem (one node sends to all 
other a different message)? Is there a code in occam for optimally
performing this? (using all links concurrently) Furthermore, is it
possible for some nodes to work while forwarding incomming messages?
3) Finally do you know the time needed for T805 to perform the 
following:
- addition, multiplication, division of integer or floating points
- swap of the location of integers or floating points
Is there any code to measure these?
Thanks and sorry for the length of this posting.

Efthimios
--
Efthimios.Tambouris@brunel.ac.uk



