Re: [Gcl-devel] Re: MPI

[Camm Maguire]

Greetings!  We use LAM MPI as distributed with Debian.  Works great
here!

Take care,

"Mike Thomas" <address@hidden> writes:

> Hi Camm.
> 
> I'm working around the Unixisms (setitimer(), signals etc) at the moment.
> As a matter of interest, which version of MPI are you using.  (I normally
> use MPICH with Haskell and C).
> 
> Cheers
> 
> Mike Thomas.
> 
> 
> ----- Original Message -----
> From: "Camm Maguire" <address@hidden>
> To: <address@hidden>; <address@hidden>
> Cc: <address@hidden>
> Sent: Friday, October 04, 2002 4:34 AM
> Subject: Re: [Gcl-devel] Re: MPI
> 
> 
> > Greetings!  OK, I've verified that gcl-mpi is working on my cluster,
> > at least to the extent of running the example programs.  But I think
> > there is an error somewhere in the master-slave.lsp file -- namely
> > when curr-tag wraps back to zero once it exceeds broadcast-tag.  Here
> > is what I get on a large (par-eval '(myfactor-par ...)):
> >
> > TRACE: 12 ->: NIL
> > TRACE: -> 12: 9998
> > TRACE: 13 ->: NIL
> > TRACE: -> 13: 9999
> > TRACE: 15 ->: NIL
> > TRACE: -> 15: 10000
> > TRACE: 1 ->: NIL
> > TRACE: -> 1: 10001
> > TRACE: 2 ->: NIL
> >
> > Error: Previous task appears to not yet have completed:
> >        2
> >
> > broad-cast-tag is 10000, and for some reason the pending array is not
> > getting cleared properly.  Commenting out the error check here allows
> > the code to proceed normally.
> >
> > Advice appreciated.
> >
> > Take care,
> >
> > Camm Maguire <address@hidden> writes:
> >
> > > Greetings, and thanks for the query.
> > >
> > > I found this at http://www-unix.mcs.anl.gov/mpi/libraries.html:
> > >
> > >   A beta version of GCL/MPI is now available by anonymous ftp. This is
> > >   a free software package built on top of MPI and GCL LISP, to easily
> > >   write parallel programs on networks of workstations. GCL/MPI is
> > >   intended as an easy-to-use master-slave distributed architecture. It
> > >   combines the feedback of an interactive language (the GCL or AKCL
> > >   dialect of LISP) with the the use of MPI (Message Passing Interface)
> > >   to take advantage of networks of workstations. As such, it is hoped
> > >   that it will make available an SPMD architecture that helps people
> > >   overcome the initial learning barrier in writing parallel
> > >   programs. Ease-of-use is emphasized while hoping to maintain
> > >   reasonable efficiency and a reasonable feature set. This
> > >   distribution, along with a paper describing it is available by
> > >   anonymous ftp in the directory /pub/people/gene/starmpi at
> > >   ftp.ccs.neu.edu . The current implementation is based on MPI and GCL
> > >   or AKCL, but it should be easily portable to other message passing
> > >   libraries (such as PVM) and other dialects of Common LISP with a
> > >   foreign function interface capable of loading object (.o) files and
> > >   library archive (.a) files. This version is still
> > >   experimental. Comments are gratefully accepted. Thanks to Gene
> > >   Cooperman .
> > >
> > > I've downloaded the source, and have gotten the thing to compile with
> > > a few changes.  I have a cluster here, and will be trying to test it
> > > out.  If the licensing works out, I'd like to add this as an
> > > autoloadable module to the distribution, given the popularity of
> > > clustering and the relative advantage it could give to gcl.  And I
> > > have some reasonable mpi experience myself, so its something I can do.
> > >
> > > Thoughts from the list welcome.
> > >
> > > This also brings up the general question of 3rd party library
> > > interfaces.  If gcl could in theory do something uniquely well for the
> > > free lisp world, this surely should be it, given its close
> > > relationship to the C compiler.
> > >
> > > As faslink has not been implemented for Linux yet, right now the way
> > > one does this is to write a lisp wrapper for the library, compile,
> > > link using the new LINK function I added for maxima, exit and restart.
> > > One no longer needs the source tree.
> > >
> > > Improvements could be the elimination of the need for the wrapper, and
> > > using dlopen to access the library in the live image, with this
> > > dynamic link being preserved on save-system.  I don't know if either
> > > are even possible, but they would preserve the incremental nature of
> > > lisp, it seems.
> > >
> > > Coming from the C world, the idea of having to write a wrapper for
> > > every 3rd party library one wants to use will permanently retard the
> > > use of lisp, I'd think.  Reimplementing everything in lisp, while in
> > > theory possible and even appealing, is not practical given the volume
> > > of high quality free software now available.
> > >
> > > Take care,
> > >
> > >
> > > root <address@hidden> writes:
> > >
> > > > Camm,
> > > >
> > > > We have just installed a beowulf cluster and I want to convince
> > > > the university to use GCL. Do you know of a working MPI extension?
> > > >
> > > > Tim
> > > >
> > > >
> > >
> > > --
> > > Camm Maguire      address@hidden
> > >
> ==========================================================================
> > > "The earth is but one country, and mankind its citizens."  --
> Baha'u'llah
> > >
> > >
> > > _______________________________________________
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> > > http://mail.gnu.org/mailman/listinfo/gcl-devel
> > >
> > >
> >
> > --
> > Camm Maguire      address@hidden
> > ==========================================================================
> > "The earth is but one country, and mankind its citizens."  --  Baha'u'llah
> >
> >
> > _______________________________________________
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> >
> 
> 
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-- 
Camm Maguire                                            address@hidden
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah