OpenMP ARB Releases Technical Report with Refinements for Accelerators and for Task Creation

SC14

NEW ORLEANS--()--The OpenMP® Architecture Review Board (ARB) announces the release of Technical Report 3 (TR3). TR3 provides a preview for the next OpenMP specification, OpenMP 4.1. It includes significant enhancements to the OpenMP device constructs, which support execution on GPUs, DSPs and other coprocessors. It also includes two significant extensions for parallelization of loops.

The key features that are included in this Technical Report include:

  • Refinement of device constructs. The addition of unstructured data movement will greatly simplify the use of these constructs with C++ applications. In addition, improved support for asynchronous execution will simplify concurrent computation on host CPUs and accelerators as well as concurrent data transfer to and from the target device.
  • New features to handle dependences within loops. Extensions to the ordered construct and the associated clause on loop constructs provide a simple mechanism to support doacross loops (parallel loops with backward loop-carried dependences), as well as the ability to apply the SIMD construct to similar loops.
  • Creation of tasks from loops. The taskloop construct specifies that the iterations of one or more of the associated loops will be executed in parallel using OpenMP tasks. This feature will simplify the parallel execution of longer running tasks with the iterations of a loop.

Feedback is welcome

The specs in this Technical Report is a work in progress. The goal of this release is to get feedback on the proposed API. Feedback can be posted on the OpenMP Forum, for which registration is required. Deadline for feedback is Feb. 6th, 2015.

“With the improvements to its asynchronous execution model and more flexible data mapping features, TR3 makes it even easier to write portable programs that leverage the performance of all CPUs and accelerators in a user’s system,” said Eric Stotzer of TI and James Beyer of Cray, co-chairs of the Accelerator Subcommittee of the OpenMP Language Committee.

“TR3 represents a significant body of work completed in the last year,” said Bronis R. de Supinski, the Chair of the OpenMP Language Committee. “The report demonstrates that we will meet our commitment to release annual updates to the OpenMP specification, in technical reports or in new specification versions. OpenMP 4.1 will be released in time for SC15.”

About OpenMP

The OpenMP ARB has as mission to standardize directive-based multi-language high-level parallelism that is performant, productive and portable. Jointly defined by a group of major computer hardware and software vendors and major parallel computing user facilities, the OpenMP API is a portable, scalable model that gives parallel programmers a simple and flexible interface for developing parallel applications for platforms ranging from embedded systems and accelerator devices to multicore systems and shared-memory systems. The OpenMP ARB owns the OpenMP brand, oversees the OpenMP specification and produces and approves new versions of the specification. Further information can be found at http://www.openmp.org/.

Contacts

OpenMP ARB
Matthijs van Waveren, +33 6 32535794
Marketing Coordinator
info@openmp.org

Contacts

OpenMP ARB
Matthijs van Waveren, +33 6 32535794
Marketing Coordinator
info@openmp.org