Phylanx Report: June 2018

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

• OTF2 Improvements
• Code view visualization
• Initial implementations of BFS, Neural Network, and LU decomposition

Organizational Activities and Results

• Weekly group-meeting, minutes:
  • June 7th: https://drive.google.com/open?id=1wqNtgXkMu9HNcfrNTZaYVeM4LtKImrKW
  • June 14th: https://drive.google.com/open?id=1vxH4B7O-xCBuBs2qnHllJIFIzXkXh-IT
  • June 21th: https://drive.google.com/open?id=1c3H5r9qAbxp2S0JYZZKp1OiWGBAys7tW
  • June 28th: https://drive.google.com/open?id=1Nz-AzY6skHGY6sazwKTPIbp_ivpfqX_J

Development Activities and Results

• Algorithms Highlighted: Logistic Regression, ALS, K-Means, Neural Network, BFS
• APEX:
  • Applied changes to prevent crashes when tracking parent/child dependencies for HPX direct actions and during distributed execution
  • OTF2 trace augmented to include PAPI measurements and improved distinctions between task types
    • Enables the future creation of custom paradigms to distinguish low-level HPX actions from high-level Phylanx primitives in the trace
• Tiling:
  • Continued improvements to the toy model of an AST tiling policy
• Traveler:
  • Tree Visualization
    • Added a code view
      • When users hover over a node on the tree, the corresponding line number is highlighted
    • Improved appearance of the tree
    • Streamlined JS code

• Gantt Chart
  • Added processing for yielding tasks
  • Added highlighting of all tasks with the same global unique identifier (GUID)
• Primitives and Algorithms:
  • LU Decomposition Primitive added to Phylanx (PR: #496)
  • Initial Naive Implementation of Neural Network Algorithm
  • Added “–docs” option to the PhySL executable which causes PhySL to print all primitives/plugins and and exit. (PR: #481)
  • Naive Implementation of BFS
  • Started to add OMPT Callbacks to HPXMP
  • Reorganized Slicing Primitive : Redundant row_slicing and column_slicing removed and calls to row_slicing and column_slicing now calls the slicing primitive with correct arguments.
• Python:
  • Created intermediate representation for PhySL
  • Refactored frontend
  • Support for NumPy.array and NumPy.zeros inside a @Phylanx decorated function (PR: #485)

Repository Activity June 1st – June 30th:

Code statistics
-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
C++                            266          11165           3660          54736
C/C++ Header                   177           3326           2140          13878
CMake                           89            783            655           3145
Python                          54           1017            743           3022
YAML                             2             20             62            320
Markdown                         2             15              0             48
Dockerfile                       2              4             27             47
INI                              1              0              0              8
-------------------------------------------------------------------------------
SUM:                           593          16330           7287          75204
-------------------------------------------------------------------------------

Impact on Other Projects

• HPX Pull Requests:
  • Reverting changes introduced by #3283 as those make applications hang (#3355)