Chapel-on-X: Exploring Tasking Runtimes for PGAS
Languages
Author/Presenters
Event Type
Workshop
Accelerators
Deep Learning
Exascale
GPU
Parallel Application Frameworks
Parallel Programming Languages, Libraries, Models
and Notations
SIGHPC Workshop
System Software
TimeSunday, November 12th12pm -
12:30pm
Location505
DescriptionWith the shift to exascale computer systems, the
importance of productive programming models for
distributed systems is increasing. Partitioned Global
Address Space (PGAS) programming models aim to reduce
the complexity of writing distributed-memory parallel
programs by introducing global operations on distributed
arrays, distributed task parallelism, directed
synchronization, and mutual exclusion. However, a key
challenge in the application of PGAS programming models
is the improvement of compilers and runtime systems. In
particular, one open question is how runtime systems
meet the requirement of exascale systems, where a large
number of asynchronous tasks are executed.
While there are various tasking runtimes such as Qthreads, OCR, and HClib, there is no existing comparative study on PGAS tasking/ threading runtime systems. To explore runtime systems for PGAS programming languages, we have implemented OCR-based and HClib-based Chapel runtimes and evaluated them with an initial focus on tasking and synchronization implementations. The results show that our OCR and HClib-based implementations can improve the performance of PGAS programs compared to the existing Qthreads backend of Chapel.
While there are various tasking runtimes such as Qthreads, OCR, and HClib, there is no existing comparative study on PGAS tasking/ threading runtime systems. To explore runtime systems for PGAS programming languages, we have implemented OCR-based and HClib-based Chapel runtimes and evaluated them with an initial focus on tasking and synchronization implementations. The results show that our OCR and HClib-based implementations can improve the performance of PGAS programs compared to the existing Qthreads backend of Chapel.
