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From: bad@flatlin.ka.sub.org (Christoph Badura)
Newsgroups: comp.sys.transputer
Subject: Re: host/transputer link speeds?
Message-ID: <1991Jun10.002259.15829@flatlin.ka.sub.org>
Date: 10 Jun 91 00:22:59 GMT
References: <1991Jun4.133704.21008@cmcl2.nyu.edu> <16425@ganymede.inmos.co.uk> <3589@kraftbus.cs.tu-berlin.de> <16455@ganymede.inmos.co.uk>
Organization: Guru Systems/Funware Department
Lines: 23

In <16455@ganymede.inmos.co.uk> davidb@brac.inmos.co.uk (David Boreham) writes:
>In article <3589@kraftbus.cs.tu-berlin.de> stewe@opal.cs.tu-berlin.de (Stephan Wenger) writes:
>>
>>With this design we realize about 1.2 MB/s transfer rate between two
>                                   ^^^^^^^^
>>of this adaptors. We have never connected it to a transputer, but i
>>think, that the transputer would not be the bottleneck.
>                                           

>Hmm. This sounds too high. I've never done any detailed measurements
>but simulations predict no more than 1Mbyte/s from any link adaptor 
>under any operating conditions. Are you sure you are measuring the
>correct thing and that ACKs are matching the right data packets ?

A former colleague achieved the same transfer rate through a C011 with
a very simple VMEbus interface and no fifos to a T800 downloading
bitmaps into video ram. 

He didn't check wether the ACKs matched the right data packets though. :-)

-- 
Christoph Badura					Karlsruhe, Deutschland
bad@flatlin.ka.sub.org					+49 721 606137