Phylanx Report: October 2018

The fourteenth month of work focused on work in the following areas:

• Performance
  • Produced a performance report
  • Performance improvements
• HPXMP
  • GCC support
  • HPXMP release
• Tiling Theory

Organizational Activities and Results

• Weekly group-meeting, minutes:
  • October 4th: https://drive.google.com/open?id=1Q4QQX3nZ3dIST1mlJVjhrFiENKtoM3ZG
  • October 11th: https://drive.google.com/open?id=1s9LnojohYvxyzoSTH2jwpNjSVtKkDS5v
  • October 18th: https://drive.google.com/open?id=1FAIi93j0uQpdAujwoy-3g7NZeTZ0Jkol
  • October 25th: https://drive.google.com/open?id=1t5erXrNDywaHz_yxEL1qTEYDf0Rv6JZi
• Phylanx Seminars:
  • http://phylanx.stellar-group.org/index.php/2018/10/08/phylanx-seminar-mathematics-of-tiling-approximations-ii/
  • http://phylanx.stellar-group.org/index.php/2018/10/15/phylanx-seminar-introduction-to-hpxmp/

Development Activities and Results

• Algorithms Highlighted: ALS, K-Means, Neural Networks
• General
  • Added iterative solvers
  • Advanced indexing
  • Added scalar reference type
  • Thread allocator improvements
• Traveler
  • Improved support for visualization in Jupyter Notebook
  • Adaptation of Traveler tree for Jupyter notebook
  • Initial design of DAG links implemented in Traveler tree
  • Traveler tree next-round evaluation plans
• Tiling
  • Theory:
    • Produced a white paper on the theoretical foundation of tiling
    • The minimization version of our formulation is inapproximable
    • The problem is closely tied to hypergraph coloring problem
  • Implementation:
    • Work on the transcoding ASTs to deduce variable names, types etc.
    • Initial implementation of distributed array algoirthms in Phylanx.
• Primitives & Algorithms
  • HPXMP
    • GCC Support for HPXMP is functional
    • First release of HPXMP eminent.
  • Improvements to ALS
  • Single hidden layer Neural Network added to Phylanx #629.
  • Added cumulative_sum primitive #610.
  • Added advanced integer indexing and advanced Boolean indexing for 1d arrays #616
• Python
  • Front-end improvements
  • Support for dictionaries

Repository Activity October 1st – October 31th:

Code statistics

-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
C++                            295          11606           4036          58105
C/C++ Header                   209           4159           2557          18679
Python                          79           1352           1085           3348
CMake                           92            801            672           3253
YAML                             2             20             64            342
Dockerfile                       2              5             27             57
Markdown                         2             15              0             48
INI                              1              0              0              8
-------------------------------------------------------------------------------
SUM:                           682          17958           8441          83840
-------------------------------------------------------------------------------

Impact on Other Projects

• Blaze:
  • Adding the missing header files for HPX backend (PR #28)
• HPX Pull Requests:
  • Attempting to work around recent clang test compilation failures (PR #3472)
  • Fixing invalid cmake code if no jemalloc prefix was given (PR #3473)
  • Don’t print docker credentials as part of the environment. (PR #3476)
  • Making sure the application’s exit code is properly propagated back to the OS (PR #3478)
  • Fixing type attribute warning for transfer_action (PR #3483)
  • Changing Base docker image (PR #3491)
  • Fixing dataflow (PR #3495)
  • Remove thread specific ptr (PR #3498)
  • Support NONAMEPREFIX in add_hpx_library() (PR #3500)