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WHAT'S NEW
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Version 3.8.0-2
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1. CTXT is now an opaque object.
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2. OpenMP is now better integrated.
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3. New non-blocking collectives.
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4. Now allowing remote builds (i.e. local contributions can
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now be sent to the final destination process)
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5. Restore Makefiles to work on parallel builds.
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Version 3.7.0.1
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1. PREC%DESCR method now requires a mandatory INFO argument.
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Version 3.7.0
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1. Major change at API level: integer kinds reorganization.
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Local indices are now of kind PSB_IPK_, whereas global indices
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are of kind PSB_LPK_; at configure time it is possible to
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choose them independently to be PSB_MPK_ (4 bytes) or PSB_EPK_
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(8 bytes), with the constraint that LPK is always at least as
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large as IPK.
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2. The internals have also been reorganized heavily, with a much
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more coherent design and split of functionalities into source
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files.
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Version 3.6.1
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1. Multiple improvements to CDASB.
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2. Some additional methods required by the latest versions of MLD
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Version 3.5.
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1. New Krylov methods methods FCG and GCR are now available.
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2. Existing codes will work untouched with version 3.5, but they
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will have to be recompiled; new methods have been added for the
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sake of GPU computations, plus the usual bunch of bug fixes.
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3. An experimental C interface is available; this is neither
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complete nor fully documented, feedback welcome.
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Version 3.
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This version requires a working Fortran 2003 compiler; we do not use
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all of the language features (specifically, so far we did not employ
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FINAL subroutines), but the features we use were sufficient in
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identifying bugs in ALL compilers we tried (all the bugs have been
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reported and mostly fixed by the respective vendors).
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The new internals have been completely overhauled, and in many cases
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rewritten; they now enable a much better interfacing with user-defined
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storage formats. If the user is only interested in the predefined
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formats, then the user's guide should be sufficient; what is somewhat
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lacking is documentation on how to add to the library, i.e. a
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developers' guide; stay tuned.
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The architecture of the Fortran 2003 sparse BLAS is described in
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S. Filippone, A. Buttari:
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Object-Oriented Techniques for Sparse Matrix Computations in Fortran
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2003,
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ACM Trans. on Math. Software, vol. 38, No. 4, 2012.
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The ideas are explored further with the paper:
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V. Cardellini, S. Filippone and D. Rouson
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Design Patterns for sparse-matrix computations on
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hybrid CPU/GPU platforms,
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Scientific Programming, 22(2014), pp.1-19.
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Version 1.0 of the library was described in:
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S. Filippone, M. Colajanni
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PSBLAS: A library for parallel linear algebra computation on sparse matrices
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ACM Trans. on Math. Software, 26(4), Dec. 2000, pp. 527-550.
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COMPILER NOTES.
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This code is confirmed to work with the following compilers (or
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later versions thereof):
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NAGware 5.2;
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GNU 4.7.3;
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Cray CCE 8.0.1;
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They are all recognized by the configure script.
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To make the script work with the Cray CCE environment, it is
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recommended to use the following:
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./configure FC=ftn F77=ftn CC=cc MPF90=ftn MPF77=ftn MPCC=cc
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with both CCE and GNU lower-level compilers.
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For the GNU compilers 4.6.x we are aware of a number of memory management
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issues that might surface in your applications; most of them (that
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we're aware of) are solved in version 4.7.2 or later.
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The Intel compiler up to version 12.1 fails to compile, as of the last
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version we got access to.
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KNOWN ISSUES.
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An annoying problem exists with some versions of MPI: if the configure
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script sets -DMPI_MOD the MPI call interfaces will be resolved by
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using the MPI Fortran module.
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However usage of the module may cause compilation to fail when
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coupled with the debugging option -g, because the compiler complains
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that it cannot find a matching interface for some of the
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communication routines.
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The solution: either take out the -g option, or, if you really need to
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debug, edit Make.inc to force -DMPI_H in place of -DMPI_MOD.
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RELATED SOFTWARE
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If you are looking for more sophisticated preconditioners, you may be
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interested in the package MLD2P4 from http://github.com/sfilippone/mld2p4-2
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