MPI Bugfix Release

v0.5.0 -- The MPI Bugfix Release (2015/06/01)

DOI: 10.6084/m9.figshare.1431794

$ git diff --stat v0.4.0..v0.5.0
> 45 files changed, 1109 insertions(+), 758 deletions(-)

Notable Features

• random deadlocks with various setups due to open and unused MPI request handlers
  (#210, #212, #216)
• PFASST with one processor was not MLSDC
  (#193, #196)
• MPI is now the default when compiling
  (#197)
• expected quadrature error now calculated and logged
  (#206)
• runtime parameters can now also be read from config file instead of command line
  (#199)
• colourful logging can now be disabled via runtime flag
  (#202)
• file name for logs can be specified via runtime parameters
  (#203)

Details

• VectorEncapsulation and MPIVectorEncapsulation merged into one
  (#176, #200)
• version now set by Python script not requireing recompilation of everything when not changed
  (#195)
• various enhancements and fixes of build system
  (#201, #211)
• little code cleanup
  (#194, #204, #205, #208)
• some documentation
  (#191, #207)

Contributors

• Matthew Emmett, Lawrence Berkeley National Laboratory (memmett)
• Torbjörn Klatt, Jülich Supercomputing Centre (torbjoernk)
• Daniel Ruprecht, Institute of Computational Science, University of Lugano (danielru)
• Robert Speck, Jülich Supercomputing Centre (pancetta)
• Selman Terzi, Jülich Supercomputing Centre (selmanTerzi)

MPI-Bugfix Release

The MPI communication of PFASST was buggy, incomplete and wrong.

The Big Improvement

DOI: 10.6084/m9.figshare.1381721

$ git diff --stat v0.3.0..v0.4.0
> 131 files changed, 15182 insertions(+), 6940 deletions(-)

Notable Features

• Iteration controll for PFASST via relative and absolute residual tolerances.
  (#139, #141, #142)
• Adding an implicit sweeper with support for LU decomposition of quadrature matrix.
  (#150)
• General improvements to the logging and configuration functionality.
  (#144, #145, #146, #148, #163, #168, #169, #177)
• Successful tests on supercomputers (i.e., JUQUEEN)
  (#168, #176)
• Improved code organization.
  (#156, #157, #158, #170, #181)
• Rewamped documentation.
  (#149, #160, [#179][], #183)
• Examples: Boris supports multiple particles and multi-level coarsening
  (#152, #172, #180)

Details

• logging framework [Easylogging][] has been updated from v9.75 to v9.80.
  (#163)
• root finding algorithm for polynomials uses fixed number of iterations or residual tolerance.
  (#162)
• reworked how pfasst::init(...) is used.
  (#148)
• minimum CMake version bumped to 2.8.6
  (#153)
• git describe-based version number as pfasst::VERSION
  (#185)
• script to generate and compile test coverage report was rewritten in Python 3.x
  (#154)

Contributors

• Matthew Emmett, Lawrence Berkeley National Laboratory (memmett)
• Torbjörn Klatt, Jülich Supercomputing Centre (torbjoernk)
• Daniel Ruprecht, Institute of Computational Science, University of Lugano (danielru)
• Robert Speck, Jülich Supercomputing Centre (pancetta)
• Selman Terzi, Jülich Supercomputing Centre (selmanTerzi)

The Big Cleanup Release (v0.3.0)

Notable Features

• Complete rewrite of quadrature functions.
• Addition of iteration control mechanism for SDC and MLSDC.
  (extention for PFASST is scheduled)
• Introduced framework for passing command line parameters to programs
  using PFASST++.
• Versatile and colourful logging framework based on
  Easylogging++ (https://github.com/easylogging/easyloggingpp).
• New Example: Boris-SDC.

Details

• Using Eigen3 (http://eigen.tuxfamily.org/) matrix data types and
  functionality instead of Boost's uBLAS
  (http://www.boost.org/doc/libs/1_57_0/libs/numeric/ublas/doc/index.html).
• Introduced callback interception points in sweepers: post_step,
  post_sweep and post_predict.
• In sweepers: state(0) is not assumed to be same as start_state.
• Examples are now in their own namespace pfasst::examples::
• Bunch of CMake-related fixes and extentions.
• Example of using PFASST++ with a Makefile project (see
  advection-diffusion example).
• Support for HashDist (https://github.com/hashdist/hashdist) to
  provide dependencies.
• A few corrections and extentions to the documentation.

Contributors

• Matthew Emmett, Lawrence Berkeley National Laboratory
• Torbjörn Klatt, Jülich Supercomputing Centre
• Daniel Ruprecht, Institute of Computational Science, University of
  Lugano
• Robert Speck, Jülich Supercomputing Centre

The MPI-PFASST Release (v0.2.0)

Features:

• PFASST implementation using MPI
• Scalar example

First Release

Features:

• basic implementations of SDC and MLSDC