Characterizing I/O Performance Using the TAU Performance System
Characterizing I/O Performance Using the TAU Performance System
复制标题
使用 TAU 性能系统表征 I/O 性能
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
K. Schuchardt
中科院分区：
文献类型：
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作者：
S. Shende;A. Malony;Wyatt Spear;K. Schuchardt
TAU是一个用于性能检测、测量和分析的集成工具包。它提供了一套灵活、可移植和可扩展的技术，用于对极端规模的HPC系统进行性能评估。本文介绍了TAU提供的I/O插装的替代方案，以及一个新工具tau_gen_wrapper的设计和实现，以包装外部库。它描述了三种插装技术：基于预处理器的替换、基于链接器的插装和基于库预加载的例程替换。它在拦截POSIX I/O库的上下文中演示了这种包装技术，并将其应用于分析Cray XE 6系统上的全局云分辨率模型（GCRM）应用程序的I/O调用。此方案允许TAU使用静态链接的可执行文件的链接器级插装来跟踪I/O，并将I/O归因于特定的代码区域。它还解决了在从大量内核中收集性能数据并表示这些数据以正确识别不良I/O来源时遇到的问题
TAU is an integrated toolkit for performance instrumentation, measurement, and analysis. It provides a flexible, portable, and scalable set of technologies for performance evaluation on extreme-scale HPC systems. This paper describes alternatives for I/O instrumentation provided by TAU and the design and implementation of a new tool, tau_gen_wrapper, to wrap external libraries. It describes three instrumentation techniques preprocessor based substitution, linker based instrumentation, and library preloading based replacement of routines. It demonstrates this wrapping technology in the context of intercepting the POSIX I/O library and its application to profiling I/O calls for the Global Cloud Resolution Model (GCRM) application on the Cray XE6 system. This scheme allows TAU to track I/O using linker level instrumentation for statically linked executables and attribute the I/O to specific code regions. It also addresses issues encountered in collecting the performance data from large core counts and representing this data to correctly identify sources of poor I/O