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August 2001

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new release of MPICH
by Rusty Lusk 20 Aug '01

20 Aug '01

The MPICH group at Argonne would like to announce release 1.2.2 of MPICH, the portable MPI implementation. Details are below. Portable MPI Model Implementation Version 1.2.2, August, 2001 David Ashton Anthony Chan Bill Gropp Rusty Lusk Robb Ross Rajeev Thakur Brian Toonen Mathematics and Computer Science Division Argonne National Laboratory MPICH is an open-source, portable implementation of the Message-Passing Interface Standard. It contains a complete implementation of version 1.2 of the MPI Standard and also significant parts of MPI-2, particularly in the area of parallel I/O. The installation and user's manuals may be found in doc/install.ps.gz and doc/guide.ps.gz respectively. Man pages for each MPI routine, along with commands for compiling and running MPI programs, are provided in the directories man (Unix man format) and www (HTML). Version 1.2.2 is primarily a bug-fix and improved-portability release, particularly in the area of Linux support. There are a number of improvements to the ch_p4 device that improve both performance and reliability, particularly on Linux platforms. Significant upgrades have been made to the MPD system of daemons that provide fast startup of MPICH jobs, management of stdio, and a crude parallel debugger based on gdb. To use the MPD system, do configure --with-device=ch_p4mpd <other configure arguments> See the README file in the mpich/mpid/mpd directory and the MPICH User's Guide for information on how to use the MPD system with MPICH. The NT version of MPICH has been further enhanced and is available separately; see the MPICH download page http://www.mcs.anl.gov/mpi/mpich/download.html Known problems and bugs with this release are documented in the file mpich/KnownBugs . There is an FAQ at http://www.mcs.anl.gov/mpi/mpich/faq.html . See this if you get "permission denied", "connection reset by peer", or "poll: protocol failure in circuit setup" when trying to run MPICH. A change log for all changes from the previous release is available from http://www.mcs.anl.gov/mpi/mpich/r1_2_2changes.html . There is a paper on jumpshot available at ftp://ftp.mcs.anl.gov/pub/mpi/jumpshot.ps.gz . A paper on MPD is available at ftp://ftp.mcs.anl.gov/pub/mpd.ps.gz. What's next: We continue to enhance MPICH with a goal of full MPI-2 capability. In addition, we continue to explore ways to improve the performance of MPICH. In the queue are improved datatype handling and a new sockets implementation. In the longer term, a new ADI with better support for multithreaded applications and new network approaches will be introduced. One area where we'd like contributions is better implementations of the collective routines. Please contact us if you'd like to contribute (send mail to gropp(a)mcs.anl.gov) Reporting Bugs: If you have trouble, first check the installation and user manuals (in mpich/doc/{guide,user}.ps.Z) . Next, check the on-line bug list at http://www.mcs.anl.gov/mpi/mpich . Finally, if you are still having problems, send The type of system (often, uname -a will give you this) The output of configure The output of make Any simple programs or tests to mpi-bugs(a)mcs.anl.gov . Please don't use the newsgroup comp.parallel.mpi ; this newsgroup is for discussions about MPI, not any particular implementation of MPI.

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