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Streamline中基于统计的性能分析功能介绍
原文参考
ARM性能分析器(Streamline) 7.0版开始支持基于SPE(统计性能分析扩展)的性能分析。SPE是Armv8.2-A架构中的一个可选扩展特性，它可以以很低的代价对处理器的流水线进行采样。Streamline可以从Arm Development Studio和Arm Mobile Stuido获取。
为什么需要SPE?
Streamline前序版本只能通过硬件计数器和软中断中采样PC信息获取CPU的信息…
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