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Tuesday, October 26 • 4:45pm - 5:45pm
PGAS in C++: A Portable Abstraction for Distributed Data Structures

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Writing programs that run on clusters of computers is notoriously tedious and error-prone, particularly for applications like genomics, sparse linear algebra, and graph analytics, which often require fine-grained, irregular communication.

In this talk, I'll argue that the Partitioned Global Address Space (PGAS) programming model, which allows remote access to a portion of the memory space on remote processes in a distributed program, is an effective model for implementing portable, high-level C++ data structures that automatically distribute data, while taking advantage of the high-performance RDMA network primitives available in most supercomputer and data center environments.

I'll discuss how our distributed data structures library BCL builds upon the concept of a global pointer to build a collection of high-performance, high-level data structures, including hash tables, queues, and dense and sparse matrices, that can be used across a variety of communication libraries, including MPI, OpenSHMEM, and GASNet-EX. I'll touch on the some of the important issues that arise in implementing distributed data structures, such as synchronization, remote reference objects, and support for GPUs.

avatar for Benjamin Brock

Benjamin Brock

PhD Student, UC Berkeley
Ben Brock is a PhD student at UC Berkeley, where he works on building libraries, tools, and algorithms for high-performance computing. His main work focuses on building a cross-platform library of data structures for distributed applications, with a focus on sparse linear algebra... Read More →

Tuesday October 26, 2021 4:45pm - 5:45pm MDT
D) Valley 1