Mitigating inductive noise in SMT processors

W. El-Essawy, D. Albonesi
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引用次数: 25

Abstract

Simultaneous multi-threading, although effective in increasing processor throughput, exacerbates the inductive noise problem such that more expensive electronic solutions are required even with the use of previously proposed microarchitectural approaches. We use detailed microarchitectural simulation together with the Pentium 4 power delivery model to demonstrate the impact of SMT on inductive noise, and to identify thread-specific microarchitectural reasons for high noise occurrences. We make the key observation that the presence of multiple threads actually provides an opportunity to mitigate the cyclical current fluctuations that cause noise, and propose the use of a prior performance enhancement technique to achieve this purpose.
减小SMT处理器中的感应噪声
同步多线程虽然能有效地提高处理器吞吐量,但却加剧了感应噪声问题,因此即使使用先前提出的微架构方法,也需要更昂贵的电子解决方案。我们使用详细的微架构模拟和Pentium 4功率传输模型来演示SMT对感应噪声的影响,并确定高噪声发生的线程特定微架构原因。我们做出了关键的观察,即多线程的存在实际上提供了一个机会来减轻引起噪声的周期性电流波动,并建议使用先前的性能增强技术来实现这一目的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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