Hi all -- Just wanted to add my voice to this report.
A number of users in my lab here have run into this, the initial symptom was that locally-commpiled versions of the molecular-dynamics code LAMMPS were failing with SEGV when the model systems got beyond a certain size. I conjecture that LAMMPS makes use of large Bcast operations. I have also confirmed the work-around -- I downloaded the source package, and built it unmodified on a 64-bit system via dpkg-buildpackage, and installed three of the resulting .deb files (mpich-bin, libmpich1.0gf, and libmpich1.0-dev) on several of our systems. Both the problem LAMMPS jobs and the test program filed with the related Ubuntu bug 231062 (https://bugs.launchpad.net/debian/+source/mpich/+bug/231062) now operate correctly. I know that mpich 1.x is deprecated, and in the fullness of time, we will migrate to Debian-packaged openmpi and/or mpich2, but 64-bit "lenny" is our workhorse for now, and a fix would definitely be appreciated here. Many scientific codes are distributed as source, and are MPI-capable, and in these cases, often the user building the code is not a developer, and can't easily break up Bcast operations into smaller chunks. -- A. -- Dr. Andrew C. E. Reid Computer Operations Administrator Center for Theoretical and Computational Materials Science National Institute of Standards and Technology, Mail Stop 8910 Gaithersburg MD 20899 USA andrew.r...@nist.gov -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
