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2003
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Optimizing Synchronization Operations for Remote Memory Communication Systems

9 years 6 months ago
Optimizing Synchronization Operations for Remote Memory Communication Systems
Synchronization operations, such as fence and locking, are used in many parallel operations accessing shared memory. However, a process which is blocked waiting for a fence operation to complete, or for a lock to be acquired, cannot perform useful computation. It is therefore critical that these operations be implemented as efficiently as possible to reduce the time a process waits idle. These operations also impact the scalability of the overall system. As system sizes get larger, the number of processes potentially requesting a lock increases. In this paper we describe the design and implementation of an optimized operation which combines a global fence operation and a barrier synchronization operation. We also describe our implementation of an optimized lock algorithm. The optimizations have been incorporated into the ARMCI communication library. The global fence and barrier operation gives a factor of improvement of up to 9 over the current implementation in a 16 node system, whi...
Darius Buntinas, Amina Saify, Dhabaleswar K. Panda
Added 04 Jul 2010
Updated 04 Jul 2010
Type Conference
Year 2003
Where IPPS
Authors Darius Buntinas, Amina Saify, Dhabaleswar K. Panda, Jarek Nieplocha
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