Abstract
Most applications targeting exascale, such as those part of the Exascale Computing Project (ECP), are designed for heterogeneous architectures and rely on the Message Passing Interface (MPI) as their underlying parallel programming model. In this paper we analyze the limitations of collective MPI communication for the computation of fast Fourier transforms (FFTs), which are relied on heavily for large-scale particle simulations. We present experiments made at one of the largest heterogeneous platforms, the Summit supercomputer at ORNL. We discuss communication models from state-of-the-art FFT libraries, and propose a new FFT library, named HEFFTE (Highly Efficient FFTs for Exascale), which supports heterogeneous architectures and yields considerable speedups compared with CPU libraries, while maintaining good weak as well as strong scalability.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
