Abstract

Scientific computing has seen an immense growth in recent years. MPI has become the de facto standard for parallel programming model for distributed memory systems. MPI-2 standard expanded MPI to include onesided communications. Computation and communication overlap is an important goal for one-sided applications. While the passive synchronization mechanism for MPI-2 one-sided communication allows for good overlap, the actual overlap achieved is often limited by the design of both the MPI library and the application. In this paper we aim to improve the performance of MPI-2 one-sided communication. In particular, we focus on the following important aspects: (i) designing one-sided passive synchronization (direct passive) support using InfiniBand atomic operations to handle both exclusive as well as shared locks (ii) enhancing one-sided communication progress to provide scope for better overlap that one-sided applications can leverage. (iii) study the overlap potential of passive synchronization and its impact on applications. We demonstrate the possible benefits of our approaches for the MPI-2 SPLASH LU application benchmark. Our results show an improvement of up to 87% for a 64 process run over the existing design.

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 call

Disclaimer: 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.