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- W2970278615 abstract "Predicting the performance of parallel loops on modern shared-memory multi-socket multi-core systems in dependence of the allocated resources is an important means to achieve better system utilization. Previous prediction techniques are tied to specific architectures and do not allow for purely online performance predictions without requiring an offline analysis of the parallel program. This paper presents a practical approach based on queueing theory to model the performance of parallel programs in dependence of the number of allocated core resources. Based on the key insight that scalability of scientific parallel loops is limited by memory performance, a hierarchically constructed M/M/1/N/N queue system is used to analytically compute the response time at the different congestion points in the memory system of modern NUMA architectures. After automatically tuning the model to a specific architecture by executing a number of micro-benchmarks, the required parameter values are obtained at runtime from hardware performance counters present in modern commodity AMD and Intel processors. Evaluated with 24 OpenMP parallel loops on a 64-core AMD and a 72-core Intel multi-socket platform, the presented queueing system is able to accurately predict the speedup of parallel loops with a mean absolute percentage error of 8.3 percent on the AMD system and 6.7 percent on the Intel platform." @default.
- W2970278615 created "2019-09-05" @default.
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- W2970278615 date "2020-02-01" @default.
- W2970278615 modified "2023-09-24" @default.
- W2970278615 title "Performance Modeling of Parallel Loops on Multi-Socket Platforms Using Queueing Systems" @default.
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- W2970278615 doi "https://doi.org/10.1109/tpds.2019.2938172" @default.
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