The Implications of Shared Data Synchronization Techniques on Multi-Core Energy Efficiency
The Implications of Shared Data Synchronization Techniques on Multi-Core Energy Efficiency
复制标题
共享数据同步技术对多核能效的影响
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Kamakoti Veezhinathan
中科院分区：
文献类型：
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作者：
A. Gautham;Kunal Korgaonkar;Patanjali Slpsk;S. Balachandran;Kamakoti Veezhinathan
共享数据同步是多核革命的核心，因为它对于编写并发程序至关重要。理想情况下，同步技术应该能够充分利用可用的内核，从而提高性能。然而，随着对节能系统的需求不断增长，它也需要在系统的能量和功率预算内工作。在本文中，我们进行了详细的研究，以及流行的共享数据同步技术的性能和能源效率的商品多核处理器。我们表明，软件transmittance内存（STM）系统可以执行更好的锁的工作负载，其中很大一部分的运行时间都花在关键部分。我们还展示了现代处理器上可用的节能技术，如C状态和时钟频率缩放，如何影响能耗和性能。最后，我们比较了STM和锁在类似的功率预算下的性能。
Shared data synchronization is at the heart of the multicore revolution since it is essential for writing concurrent programs. Ideally, a synchronization technique should be able to fully exploit the available cores, leading to improved performance. However, with the growing demand for energy-efficient systems, it also needs to work within the energy and power budget of the system. In this paper, we perform a detailed study of the performance as well as energy efficiency of popular shared-data synchronization techniques on a commodity multicore processor. We show that Software Transactional Memory (STM) systems can perform better than locks for workloads where a significant portion of the running time is spent in the critical sections. We also show how power-conserving techniques available on modern processors like C-states and clock frequency scaling impact energy consumption and performance. Finally, we compare the performance of STMs and locks under similar power budgets.