Phylanx Report: July 2018

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

• PhyLS Compiler Refactoring
• Performance analysis
• HPXMP – HPX OpenMP backend
• Distributed execution

Organizational Activities and Results

• Weekly group-meeting, minutes:
  • July 5th: https://drive.google.com/open?id=1McH5BuRNtBeZn18nOPHWq4WYcz4zXgew
  • July 12th: https://drive.google.com/open?id=1QtEabfc4rZ1bgEX2qr2MZ4wyii3yJNXz
  • July 19th: https://drive.google.com/open?id=1Lvy2mElg0WVdeF-Dh7OjrT-SmO_WM1fj
  • July 26th: https://drive.google.com/open?id=1m4SfR1mhsAe0Jc4FXbwrpcIbb-VijU_H

Development Activities and Results

• Algorithms Highlighted: Logistic Regression, ALS, K-Means, Neural Network, BFS
• APEX:
  • Rewrote OpenMP OMPT event support to synchronize with OpenMP 5.0 draft specification TR7
    • Support for OMPT Task/Region GUIDS
    • Support for dependency tracking
    • Tested with Clang 6.0 (HPX testing in next month)
• Tiling:
  • Drs. Gouli Ding and Indranil Banerjee have joined the team
  • Evaluated an MIN 2-SAT,  MIN 3-SAT, and pseudo-boolean optimization approximations
• Traveler:
  • Tree Visualization
    • Tree default now collapses by line of code rather than individual
      task to de-clutter
    • Exclusive time now calculated from max of children times
    • Improvements and fixes to code view UI and code matching
  • Gantt Chart
    • Live demo now available for development users
    • UI bug fixes for brushing and resizing
• Primitives and Algorithms:
  • First distributed test case
    • Strassen Multiplication on 2 localities
  • New API for slicing operation #538
  • Features added to the store primitive to support set operation #534
  • HPXMP now has 7 OMPT callbacks implemented
  • Append function added to the list #536
  • Interpreter expanded with more options #520
• Python:
  • Improvements to the Python front end
• PhySL Compiler Refactored

Repository Activity July 1st – July 31th:

Code statistics
-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
C++                            283          11711           3869          58339
C/C++ Header                   194           3584           2298          15181
CMake                           91            796            665           3203
Python                          63           1080            781           3117
YAML                             2             20             62            320
Markdown                         2             15              0             48
Dockerfile                       2              4             27             47
INI                              1              0              0              8
-------------------------------------------------------------------------------
SUM:                           638          17210           7702          80263
-------------------------------------------------------------------------------

Impact on Other Projects

• HPX Pull Requests:
  • Allowing to register thread event functions (start/stop/error) #3396
  • Adapt integration of HPXMP to latest build system changes #3391
  • Make AGAS measurements optional #3390
  • Add several functionalities allowing to optimize synchronous action invocation #3388
  • Adding support for boost::container::small_vector to dataflow #3386
  • Making sure thread local storage is enable for hpxMP #3383
  • util::format: add type_specifier<> specializations for %s and %ls #3370
  • Making sure all parcels get destroyed on an HPX thread (TCP pp) #3361