Re: CommsTime times?

["B.M. Cook" <b.m.cook@xxxxxxxxxxxxxx>]

Dyke/Oyvind et al.,

>   6. With the PAR version of delta, the communication loads are the same
>      as for the SEQ delta, but there is the additional overhead of starting
>      up and shutting down one new process per cycle.

In the hardware case, with the optimisations reported at CPA2000, the
reverse is the case. A 2-component PAR is FASTER than a 2-component SEQ.
At best, if both communications are ready to proceed, PAR is twice as fast
as SEQ.

In general PAR is faster than SEQ - if PAR truly is parallel, but the current
implementation may not quite achieve that for the particular case of a
3-component PAR/SEQ.

	    Barry.


-- 
/----------------------------------------------------------------------------\
| Barry M Cook, BSc, PhD, CEng, MBCS                                         |
| Senior Lecturer,                           Department of Computer Science, |
| Chartered Information Systems Engineer.    Keele University,               |
|                                            Keele,                          |
| Phone: +44 1782 583411                     Staffordshire,                  |
| FAX:   +44 1782 713082                     ST5 5BG,                        |
| email: barry@xxxxxxxxxxxxxx                UK.                             |
\----------------------------------------------------------------------------/