Xavier Teruel 's talk

Heterogeneous Parallel Programming with OmpSs

Venue: Event date: Speaker(s): Xavier Martorell & Xavier Teruel

This tutorial will show Heterogeneous Parallel Programming using the OmpSs Programming Model. It will be based on both teaching and laboratory sessions.

Contents

OmpSs is a programming model developed at BSC that we use as a forerunner for OpenMP. Like OpenMP, it is based on compiler directives. It is the base platform where we have developed OpenMP tasking, support for dependences, priorities, task reductions, and it also includes support for heterogeneous devices.

We will introduce the OmpSs basic concepts related to task-based parallelism for the SMP cores and then quickly move to the support for heterogeneous devices. OmpSs allows to leverage existing OpenCL and CUDA kernels without the burden to have to deal with data copies to/from the devices. Data copies are just triggered automatically by the OmpSs runtime, based on the task dependence annotations.

OmpSs is currently being extended for FPGA devices, in the context of the AXIOM European Project. We will also show how the same directives are being used to outline code that can be compiled and run on FPGA devices.

The tutorial will include two laboratory sessions. We will provide student accounts to attendees in our Minotauro machine (Intel-based with NVidia GPUs), and several exercises will be provided to be completed online (cholesky, matrix multiplication, nbody, 3d-stencil, merge-sort, histogram…), and learn better the details of the OmpSs support for both the SMP and heterogeneous architectures.

Agenda

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