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SUMMARY:A Model for Concurrent Priority Queue on Manycore Architectures LOCATION:Core 305 DESCRIPTION;ENCODING=QUOTED-PRINTABLE:
Abstract:
The concurrent priority queue is one of the shared memory data structures that can be dynamically maintained and u pdated for communication among co-running threads, which allows data with h igh priority to be served before others in applications that require comple x asynchronous communication patterns. For instance, the following algorith ms can take advantages of a concurrent priority queue: Dijkstra’s shortest path algorithm, Prim’s minimal spanning tree algorithm, data compression an d A* search in artificial intelligence, which are building blocks for compl ex system software including operating system scheduler, interruption handl er, and garbage collection. However, it is challenging to exploit the perfo rmance of heap-based priority queue on many-core architectures like GPUs du e to control divergence and memory irregularity. This thesis focuses on the development and evaluation of a model for concurrent priority queue on GPU . We present an efficient model for heap-based concurrent priority queue, c alled the generalized heap, which exploits both inter-node and intra-node p arallelism by incorporating with multi-state locking mechanism and batch pr ocessing on data nodes. The performance of the concurrent priority queue ba sed on the generalized heap model is thoroughly evaluated against previous serial and GPU implementations. We show a maximum of 19.49X and 2.11X speed up compared to previous serial and GPU implementation, respectively. We als o apply our generalized heap model in real-world applications such as singl e-source shortest path and 0/1 knapsack problem with up to 1.23X and 12.19X speedup, respectively.
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