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1. 发明授权

US07383393B2 System and method for cooperative prefetching 有权
标题翻译：合作预取的系统和方法
公开(公告)号：US07383393B2
公开(公告)日：2008-06-03
申请号：US11261357
申请日：2005-10-28
申请人： Hassan F. Al Sukhni , James C. Holt
发明人： Hassan F. Al Sukhni , James C. Holt
IPC分类号： G06F12/00
CPC分类号： G06F12/0862
摘要： A first prefetch engine from a first plurality of prefetch engines is allocated to a first load instruction in response to a buffer miss of an iteration of the first load instruction in a program stream. The first plurality of prefetch engines include prefetch engines for prefetching data from memory to a buffer based on a predicted stride. A second prefetch engine from a second plurality of prefetch engines is allocated to the first load instruction in response to the buffer miss. The second plurality of prefetch engines include prefetch engines for prefetching data from memory to the buffer based on an instruction loop representative of a sequence of instructions that affect an address value associated with an allocated load instruction. One of the first or second prefetch engines is deallocated if the other prefetch engine achieves a prefetch performance greater than a first threshold value.
摘要翻译：来自第一多个预取引擎的第一预取引擎被分配给第一加载指令，以响应程序流中的第一加载指令的迭代的缓冲器未命中。第一组多个预取引擎包括预取引擎，用于基于预测步幅将数据从存储器预取到缓冲器。来自第二多个预取引擎的第二预取引擎被响应于缓冲器未命中而被分配给第一加载指令。第二组多个预取引擎包括预取引擎，用于将数据从存储器预取到缓冲器，这是基于代表影响与分配的加载指令相关联的地址值的指令序列的指令循环。如果其他预取引擎实现大于第一阈值的预取性能，则第一或第二预取引擎之一被释放。

2. 发明授权

US07506105B2 Prefetching using hashed program counter 有权
标题翻译：使用哈希程序计数器预取
公开(公告)号：US07506105B2
公开(公告)日：2009-03-17
申请号：US11120288
申请日：2005-05-02
申请人： Hassan F. Al-Sukhni , James C. Holt , Matt B. Smittle , Michael D. Snyder , Brian C. Grayson
发明人： Hassan F. Al-Sukhni , James C. Holt , Matt B. Smittle , Michael D. Snyder , Brian C. Grayson
IPC分类号： G06F12/06 , G06F9/34
CPC分类号： G06F12/0862 , G06F9/30047 , G06F9/3455 , G06F9/383 , G06F9/3832 , G06F2212/6026
摘要： Generating a hashed value of the program counter in a data processing system. The hashed value can be used for prefetching in the data processing system. In some examples, the hashed value is used to identify whether a load instruction associated with the hashed value has an address that is part of a strided stream in an address stream. In some examples, the hashed value is a subset of bits of the bits of the program counter. In other examples, the hashed value may be derived in other ways from the program counter.
摘要翻译：在数据处理系统中生成程序计数器的散列值。散列值可用于数据处理系统中的预取。在一些示例中，散列值用于识别与散列值相关联的加载指令是否具有作为地址流中的跨流的一部分的地址。在一些示例中，散列值是程序计数器的位的位的子集。在其他示例中，散列值可以以程序计数器的其他方式导出。

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