Algorithms for scalable synchronization on shared-memory multiprocessors
ACM Transactions on Computer Systems (TOCS)
High Performance Distributed Lock Management Services using Network-based Remote Atomic Operations
CCGRID '07 Proceedings of the Seventh IEEE International Symposium on Cluster Computing and the Grid
Natively Supporting True One-Sided Communication in MPI on Multi-core Systems with InfiniBand
CCGRID '09 Proceedings of the 2009 9th IEEE/ACM International Symposium on Cluster Computing and the Grid
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Multi/many-core architectures offer high compute density on modern supercomputing clusters. It is critical for applications to minimize communication and synchronization overheads to achieve peak performance. MPI offers one-sided communication semantics that are aimed at enabling this. In this paper, we propose a novel design for implementing truly passive shared and exclusive MPI_Win_lock/unlock using InfiniBand atomics. We address limitations in designs published earlier. We also present the impact of our design on MPI_Win_lock all introduced in MPI-3. We demonstrate superior overlap compared to existing two-sided implementations. Using Splash LU kernel, proposed design delivers upto 49% performance improvement compared to existing designs.