Newsgroups: comp.parallel.pvm
From: schiotz@oersted (Jakob Schiotz)
Reply-To: schiotz@fysik.dtu.dk
Subject: Broadcast on CM-5
Organization: Physics Department, Techn. Univ. of Denmark
Date: 23 Aug 1994 12:26:13 GMT
Message-ID: <33cpt5$a0s@news.uni-c.dk>

Hi,

I am considering writing a PVM program on a Connection Machine CM-5E,
but before I write it I have to decide on how communication should be
done.

I plan to use a master program and slaves on all the nodes, and I want
to broadcast data to ALL the nodes. Is there an efficient way of doing
this? I suppose the native message passing library has such a
broadcast, but will pvm_bcast() use it? I fear it may not, since
pvm_bcast() sends to a group, and not all the nodes might belong to
the group. It would ruin performance if the master is actually sending
each message 128 times!

I am looking forward to any ideas.

--
Jakob Schiotz                    !  The noble art of losing face
Physics Department               !  May someday save the human race
Technical University of Denmark  !  And turn into eternal merit
DK-2800 Lyngby, Denmark          !  What weaker mind would call disgrace
schiotz@fysik.dtu.dk             !                  - Piet Hein
              ^^^ Note: new domain

