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    • 2. 发明申请
    • Online Computation of Cache Occupancy and Performance
    • 缓存占用率和性能的在线计算
    • US20100095300A1
    • 2010-04-15
    • US12251108
    • 2008-10-14
    • Richard WestPuneet ZarooCarl A. WaldspurgerXiao ZhangHaoqiang Zheng
    • Richard WestPuneet ZarooCarl A. WaldspurgerXiao ZhangHaoqiang Zheng
    • G06F9/50G06F9/46
    • G06F9/50G06F9/5005G06F9/5011G06F9/5016G06F9/5022G06F9/5027G06F9/5033G06F9/5044G06F9/505G06F9/5055G06F11/3409G06F11/3442G06F11/3452G06F11/3466G06F12/08G06F12/0802G06F12/0804G06F12/0806G06F12/0815G06F12/084G06F2201/88
    • Methods, computer programs, and systems for managing thread performance in a computing environment based on cache occupancy are provided. In one embodiment, a computer implemented method assigns a thread performance counter to threads being created to measure the number of cache misses for the threads. The thread performance counter is deduced in one embodiment based on performance counters associated with each core in a processor. The method further calculates a self-thread value as the change in the thread performance counter of a given thread during a predetermined period, and an other-thread value as the sum of all the changes in the thread performance counters for all threads except for the given thread. Further, the method estimates a cache occupancy for the given thread based on a previous occupancy for the given thread, and the calculated shelf-thread and other-thread values. The estimated cache occupancy is used to assign computing environment resources to the given thread. In another embodiment, cache miss-rate curves are constructed for a thread to help analyze performance tradeoffs when changing cache allocations of the threads in the system.
    • 提供了基于缓存占用的用于在计算环境中管理线程性能的方法,计算机程序和系统。 在一个实施例中,计算机实现的方法为正在创建的线程分配线程性能计数器以测量线程的高速缓存未命中的数量。 基于与处理器中的每个核心相关联的性能计数器,在一个实施例中推导出线程性能计数器。 该方法进一步计算自线程值作为在预定时段期间给定线程的线程性能计数器的变化,而另一线程值作为所有线程的线程性能计数器的所有变化之和除外 给线程 此外,该方法基于给定线程的先前占用以及所计算的架线和其他线程值来估计给定线程的高速缓存占用。 估计的高速缓存占用率用于将计算环境资源分配给给定的线程。 在另一个实施例中,为线程构建高速缓存未命中率曲线,以帮助在改变系统中的线程的高速缓存分配时分析性能权衡。