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- W1579891937 abstract "With the ever-increasing numbers of cores per node on HPC systems, applications are increasingly using threads to exploit the shared memory within a node, combined with MPI across nodes. Achieving high performance when a large number of concurrent threads make MPI calls is a challenging task for an MPI implementation. We describe the design and implementation of our solution in MPICH2 to achieve high-performance multithreaded communication on the IBM Blue Gene/P. We use a combination of a multichannel-enabled network interface, fine-grained locks, lock-free atomic operations, and specially designed queues to provide a high degree of concurrent access while still maintaining MPI’s message-ordering semantics. We present performance results that demonstrate that our new design improves the multithreaded message rate by a factor of 3.6 compared with the existing implementation on the BG/P. Our solutions are also applicable to other high-end systems that have parallel network access capabilities." @default.
- W1579891937 created "2016-06-24" @default.
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- W1579891937 date "2010-01-01" @default.
- W1579891937 modified "2023-10-16" @default.
- W1579891937 title "Enabling Concurrent Multithreaded MPI Communication on Multicore Petascale Systems" @default.
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- W1579891937 doi "https://doi.org/10.1007/978-3-642-15646-5_2" @default.
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