Time and Location: 11/13/2019, Wed., 10:30 a.m., CS Conference Room 206

 

Speaker: Mr. Brody Williams

 

Title: Optimized Collective Communication for the xBGAS

 

Abstract: We have previously proposed utilizing the Extended Base Global Address Space (xBGAS) extension to the RISC-V ISA to realize and accelerate the performance of the PGAS programming model in high-performance computing environments. Typical workloads on these systems require frequent communication between disparate resources in order to reach any meaningful scale. However, current communication methodologies such as MPI and OpenSHMEM accomplish this communication through the use of several underlying software layers which reduces overall performance. We leverage the microarchitecture level support of xBGAS to eliminate this overhead. Previously, I introduced an initial implementation of support for collective communication as part of the xBGAS runtime library. In the presentation, I will provide a brief recap of this previous work and then detail the recent addition of new collectives operations and underlying algorithms.