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    • 4. 发明授权
    • System, method and computer program product for providing a programmable quiesce filtering register
    • 用于提供可编程静态滤波寄存器的系统,方法和计算机程序产品
    • US08332614B2
    • 2012-12-11
    • US13372603
    • 2012-02-14
    • Lisa C. HellerHarald BoehmUte GaertnerJennifer A. NavarroTimothy J. Slegel
    • Lisa C. HellerHarald BoehmUte GaertnerJennifer A. NavarroTimothy J. Slegel
    • G06F12/10
    • G06F9/4812
    • Storing translation lookaside buffer (TLB) entries are in a TLB1 at the processor. The TLB1 includes entries associated with main storage accesses of programs executing in a guest mode in a current zone and entries associated with main storage accesses of firmware executing in a host mode. A quiesce interruption request is received at the processor that includes a requesting zone indicator. The processor is either executing in the host mode and has no zone or in the guest mode with the current zone. The requesting zone indicator and the contents of a programmable filtering register that indicates exceptions to filtering performed by the processor is used to determine if filtering should be performed. The quiesce interruption request may be filtered based on the requesting zone indicator even after the mode switches from the guest mode to the host mode.
    • 存储翻译后备缓冲区(TLB)条目位于处理器的TLB1中。 TLB1包括与在当前区域中以访客模式执行的程序的主存储访问相关联的条目和与以主机模式执行的固件的主存储访问相关联的条目。 在包括请求区域指示符的处理器处接收到静默中断请求。 处理器正在主机模式下执行,并且没有区域,或者在访问模式下使用当前区域。 请求区域指示符和指示处理器执行的过滤异常的可编程过滤寄存器的内容用于确定是否应执行过滤。 即使模式从客户模式切换到主机模式,也可以基于请求区域指示符来过滤停顿中断请求。
    • 7. 发明申请
    • METHOD, SYSTEM, AND COMPUTER PROGRAM PRODUCT FOR CROSS-INVALIDATION HANDLING IN A MULTI-LEVEL PRIVATE CACHE
    • 在多层次私有缓存中进行交叉处理的方法,系统和计算机程序产品
    • US20090240889A1
    • 2009-09-24
    • US12051736
    • 2008-03-19
    • Ka Shan ChoyJennifer A. NavarroChung-Lung Kevin ShumAaron Tsai
    • Ka Shan ChoyJennifer A. NavarroChung-Lung Kevin ShumAaron Tsai
    • G06F12/08
    • G06F12/0811G06F12/0815
    • A method, system, and computer program product for cross-invalidation handling in a multi-level private cache are provided. The system includes a processor. The processor includes a fetch address register logic in communication with a level 1 data cache, a level 1 instruction cache, a level 2 cache, and a higher level cache. The processor also includes a set of cross-invalidate snapshot counter implemented in the fetch address register. Each cross-invalidate snapshot counter tracks an amount of pending higher level cross-invalidations received before new data for the corresponding cache miss is returned from the higher-level cache. The processor also includes logic executing on the fetch address register for handling level 1 data cache misses and interfacing with the level 2 cache. In response to the new data, and upon determining that older cross-invalidations are pending, the new data is prevented from being used by the processor.
    • 提供了一种用于在多级私有缓存中进行交叉无效处理的方法,系统和计算机程序产品。 该系统包括一个处理器。 处理器包括与1级数据高速缓存,1级指令高速缓存,2级高速缓存和更高级高速缓存通信的取指地址寄存器逻辑。 该处理器还包括一组在获取地址寄存器中实现的交叉无效快照计数器。 每个交叉无效快照计数器跟踪在从较高级别的缓存返回相应的高速缓存未命中的新数据之前接收到的未决更高级别的交叉无效的量。 该处理器还包括在取出地址寄存器上执行的逻辑,用于处理1级数据高速缓存未命中并与2级缓存进行接口。 响应于新数据,并且在确定旧的交叉无效正在等待时,防止新数据被处理器使用。
    • 8. 发明授权
    • Enhancing timeliness of cache prefetching
    • 提高缓存预取的及时性
    • US08285941B2
    • 2012-10-09
    • US12036476
    • 2008-02-25
    • Kattamuri EkanadhamJennifer A. NavarroIl ParkChung-Lung Kevin Shum
    • Kattamuri EkanadhamJennifer A. NavarroIl ParkChung-Lung Kevin Shum
    • G06F12/06
    • G06F12/0862G06F2212/6026
    • A system, method, and computer program product for enhancing timeliness of cache memory prefetching in a processing system are provided. The system includes a stride pattern detector to detect a stride pattern for a stride size in an amount of bytes as a difference between successive cache accesses. The system also includes a confidence counter. The system further includes eager prefetching control logic for performing a method when the stride size is less than a cache line size. The method includes adjusting the confidence counter in response to the stride pattern detector detecting the stride pattern, comparing the confidence counter to a confidence threshold, and requesting a cache prefetch in response to the confidence counter reaching the confidence threshold. The system may also include selection logic to select between the eager prefetching control logic and standard stride prefetching control logic.
    • 提供了一种用于增强处理系统中的高速缓存存储器预取的及时性的系统,方法和计算机程序产品。 系统包括步幅图案检测器,用于检测作为连续高速缓存访​​问之间的差异的字节量的步幅大小的步幅图案。 系统还包括置信柜台。 该系统还包括用于当步幅大小小于高速缓存行大小时执行方法的迫切预取控制逻辑。 该方法包括响应于步幅模式检测器检测步幅模式来调整置信计数器,将置信计数器与置信阈值进行比较,以及响应于达到置信阈值的置信度计数器请求高速缓存预取。 系统还可以包括选择逻辑以在急切预取控制逻辑和标准步幅预取控制逻辑之间进行选择。
    • 9. 发明授权
    • Method, system, and computer program product for cross-invalidation handling in a multi-level private cache
    • 用于多级私有缓存中的交叉无效处理的方法,系统和计算机程序产品
    • US07890700B2
    • 2011-02-15
    • US12051736
    • 2008-03-19
    • Ka Shan ChoyJennifer A. NavarroChung-Lung Kevin ShumAaron Tsai
    • Ka Shan ChoyJennifer A. NavarroChung-Lung Kevin ShumAaron Tsai
    • G06F12/00
    • G06F12/0811G06F12/0815
    • A method, system, and computer program product for cross-invalidation handling in a multi-level private cache are provided. The system includes a processor. The processor includes a fetch address register logic in communication with a level 1 data cache, a level 1 instruction cache, a level 2 cache, and a higher level cache. The processor also includes a set of cross-invalidate snapshot counter implemented in the fetch address register. Each cross-invalidate snapshot counter tracks an amount of pending higher level cross-invalidations received before new data for the corresponding cache miss is returned from the higher-level cache. The processor also includes logic executing on the fetch address register for handling level 1 data cache misses and interfacing with the level 2 cache. In response to the new data, and upon determining that older cross-invalidations are pending, the new data is prevented from being used by the processor.
    • 提供了一种用于在多级私有缓存中进行交叉无效处理的方法,系统和计算机程序产品。 该系统包括一个处理器。 处理器包括与1级数据高速缓存,1级指令高速缓存,2级高速缓存和更高级高速缓存通信的取指地址寄存器逻辑。 该处理器还包括一组在获取地址寄存器中实现的交叉无效快照计数器。 每个交叉无效快照计数器跟踪在从较高级别的缓存返回相应的高速缓存未命中的新数据之前接收到的未决更高级别的交叉无效的量。 该处理器还包括在取出地址寄存器上执行的逻辑,用于处理1级数据高速缓存未命中并与2级缓存进行接口。 响应于新数据,并且在确定旧的交叉无效正在等待时,防止新数据被处理器使用。