Newsgroups: comp.parallel.mpi
From: tuel@tuel.kgn.ibm.com (Bill Tuel)
Subject: Re: MPI and Unix system semaphore (specific for SP2)
Summary: POE and MPL use signals.  You must handle interrupts
Organization: IBM Corporation, Poughkeepsie NY
Date: 2 Nov 1995 09:20:29 -0500
Message-ID: <47ak3d$gsa@tuel.kgn.ibm.com>

POE and MPL use a SIGALRM handler to assure progress of physical
message transmission.  "Slow" system calls (including select,
read, and sleep) may be interrupted, and return with errno=EINTR
set, allowing the user to retry.  Programs that use POE/MPL or
MPI must handle these interrupt conditions, as documented in the
Parallel Environment MPI Subroutine Reference Appendices.

Bill Tuel	
IBM POWERParallel Development Lab
Poughkeepsie, NY 

