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- Newsgroups: comp.parallel
- Path: sparky!uunet!gatech!hubcap!fpst
- From: tom@icase.edu (Tom Crockett)
- Subject: Re: PVM vs. Express
- Message-ID: <1992Nov18.130411.25733@hubcap.clemson.edu>
- Sender: fpst@hubcap.clemson.edu (Steve Stevenson)
- Nntp-Posting-Host: cobia.icase.edu
- Organization: ICASE/NASA Langley
- References: <1992Nov13.125101.20219@hubcap.clemson.edu> <1992Nov16.131740.5002@hubcap.clemson.edu> <1992Nov16.190340.7465@hubcap.clemson.edu>
- Date: 17 Nov 1992 19:17:26 GMT
- Approved: parallel@hubcap.clemson.edu
- Lines: 31
-
- In article <1992Nov16.190340.7465@hubcap.clemson.edu>, gropp@godzilla.mcs.anl.gov (William Gropp) writes:
-
- >I'd like to correct this. PVM 2.3 and 2.4 do NOT run on the iPSC/860, iPSC/2
- >or CM-2. They DO run on the hosts of these machines, which is an entirely
- >different matter. Since PVM provides a SPMD/MIMD model, it is highly
- >unlikely that it will ever run "on" a CM-2. Saying that it runs on these
- >machines is highly misleading at best.
- >
-
- We have a project underway here at NASA Langley which partially corrects this deficiency for
- the iPSC/860. In addition to the iPSC/860 and its SRM host, you need a "back end" Ethernet
- service node, and a workstation which you can designate as a "PVM host" for the iPSC. Given
- this, we have modified the PVM daemon and the PVM library so that you can include PVM calls
- directly in your node programs. These calls use the socket library under NX to communicate
- with the daemon, which runs on the designated workstation. This strategy eliminates the
- extra layer of host software which was previously needed to translate between PVM calls and
- NX calls, and also results in a substantial performance improvement by eliminating the
- notoriously underpowered SRM from the process.
-
- Most of this work was done by Mike Nelson (m.l.nelson@larc.nasa.gov). You can contact him
- directly for more information.
-
- Tom Crockett
-
- ICASE
- Institute for Computer Applications in Science and Engineering
-
- M.S. 132C e-mail: tom@icase.edu
- NASA Langley Research Center phone: (804) 864-2182
- Hampton, VA 23681-0001
-
-