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    Prefetching irregular data references for software controlled caches
    1.
    发明授权
    Prefetching irregular data references for software controlled caches 失效
    预取软件控制缓存的不规则数据引用

    公开(公告)号：US08762968B2

    公开(公告)日：2014-06-24

    申请号：US13534794

    申请日：2012-06-27

    申请人： Tong Chen ,  Marc Gonzalez tallada ,  Zehra N. Sura ,  Tao Zhang

    发明人： Tong Chen ,  Marc Gonzalez tallada ,  Zehra N. Sura ,  Tao Zhang

    IPC分类号： G06F9/44

    CPC分类号： G06F8/4442

    摘要： Prefetching irregular memory references into a software controlled cache is provided. A compiler analyzes source code to identify at least one of a plurality of loops that contain an irregular memory reference. The compiler determines if the irregular memory reference within the at least one loop is a candidate for optimization. Responsive to an indication that the irregular memory reference may be optimized, the compiler determines if the irregular memory reference is valid for prefetching. Responsive to an indication that the irregular memory reference is valid for prefetching, a store statement for an address of the irregular memory reference is inserted into the at least one loop. A runtime library call is inserted into a prefetch runtime library for the irregular memory reference. Data associated with the irregular memory reference is prefetched into the software controlled cache when the runtime library call is invoked.

    摘要翻译： 提供了将不规则内存引用预取到软件控制的缓存中。 编译器分析源代码以识别包含不规则存储器引用的多个循环中的至少一个循环。 编译器确定至少一个循环内的不规则存储器引用是否是优化的候选者。 响应于可以优化不规则存储器引用的指示，编译器确定不规则存储器引用是否对预取有效。 响应于不规则存储器引用对于预取有效的指示，将不规则存储器引用的地址的存储语句插入到至少一个循环中。 运行时库调用插入到不规则内存引用的预取运行时库中。 当调用运行时库调用时，与不规则内存引用相关联的数据将被预取到软件控制的缓存中。

    Optimized Code Generation Targeting a High Locality Software Cache
    2.
    发明申请
    Optimized Code Generation Targeting a High Locality Software Cache 失效
    针对高位置软件缓存的优化代码生成

    公开(公告)号：US20100088673A1

    公开(公告)日：2010-04-08

    申请号：US12246602

    申请日：2008-10-07

    申请人： Tong Chen ,  Alexandre E. Eichenberger ,  Marc Gonzalez Tallada ,  John K. O'Brien ,  Kathryn M. O'Brien ,  Zehra N. Sura ,  Tao Zhang

    发明人： Tong Chen ,  Alexandre E. Eichenberger ,  Marc Gonzalez Tallada ,  John K. O'Brien ,  Kathryn M. O'Brien ,  Zehra N. Sura ,  Tao Zhang

    IPC分类号： G06F9/44

    CPC分类号： G06F8/4442

    摘要： Mechanisms for optimized code generation targeting a high locality software cache are provided. Original computer code is parsed to identify memory references in the original computer code. Memory references are classified as either regular memory references or irregular memory references. Regular memory references are controlled by a high locality cache mechanism. Original computer code is transformed, by a compiler, to generate transformed computer code in which the regular memory references are grouped into one or more memory reference streams, each memory reference stream having a leading memory reference, a trailing memory reference, and one or more middle memory references. Transforming of the original computer code comprises inserting, into the original computer code, instructions to execute initialization, lookup, and cleanup operations associated with the leading memory reference and trailing memory reference in a different manner from initialization, lookup, and cleanup operations for the one or more middle memory references.

    摘要翻译： 提供了针对高位置软件缓存的优化代码生成机制。 解析原始计算机代码以识别原始计算机代码中的内存引用。 内存引用被分类为常规内存引用或不规则内存引用。 常规内存引用由高位置缓存机制控制。 原始计算机代码由编译器转换以生成转换的计算机代码，其中常规存储器引用被分组成一个或多个存储器参考流，每个存储器参考流具有前导存储器引用，尾随存储器引用和一个或多个 中间内存引用。 原始计算机代码的转换包括将原始计算机代码中的指令以不同于初始化，查找和清除操作的方式与前导存储器引用和尾随存储器引用相关联的执行初始化，查找和清除操作的指令进行插入 或更多的中间内存引用。

    Reducing Cache Pollution of a Software Controlled Cache
    3.
    发明申请
    Reducing Cache Pollution of a Software Controlled Cache 失效
    减少软件控制缓存的缓存污染

    公开(公告)号：US20090254711A1

    公开(公告)日：2009-10-08

    申请号：US12062587

    申请日：2008-04-04

    申请人： Tong Chen ,  Marc Gonzalez tallada ,  Zehra N. Sura ,  Tao Zhang

    发明人： Tong Chen ,  Marc Gonzalez tallada ,  Zehra N. Sura ,  Tao Zhang

    IPC分类号： G06F12/00

    CPC分类号： G06F12/0862

    摘要： Reducing cache pollution of a software controlled cache is provided. A request is received to prefetch data into the software controlled cache. A first designator is set for a first cache access to a first value. If there is the second cache access to prefetch, a determination is made as to whether data associated with the second cache access exists in the software controlled cache. If the data is in the software controlled cache, a determination is made as to whether a second value of a second designator is greater than the first value of the first cache access. If the second value fails to be greater than the first value, the position of the first cache access and the second cache access in a cache line is swapped. The first value is decremented by a predetermined amount and the second value is replaced to equal the first value.

    摘要翻译： 提供减少软件控制缓存的缓存污染。 接收到将数据预取到软件控制的高速缓存中的请求。 第一个指示符设置为第一个缓存访问第一个值。 如果存在对预取的第二高速缓存访​​问，则确定与软件控制的高速缓存中是否存在与第二高速缓存访​​问相关联的数据。 如果数据在软件控制的高速缓存中，则确定第二指示符的第二值是否大于第一高速缓存访​​问的第一值。 如果第二个值不能大于第一个值，则交换高速缓存行中的第一高速缓存访​​问和第二高速缓存访​​问的位置。 第一值减少预定量，第二值被替换为等于第一值。

    Dynamically controlling a prefetching range of a software controlled cache
    6.
    发明授权
    Dynamically controlling a prefetching range of a software controlled cache 失效
    动态控制软件控制缓存的预取范围

    公开(公告)号：US08146064B2

    公开(公告)日：2012-03-27

    申请号：US12062559

    申请日：2008-04-04

    申请人： Tong Chen ,  Marc Gonzalez tallada ,  Zehra N. Sura ,  Tao Zhang

    发明人： Tong Chen ,  Marc Gonzalez tallada ,  Zehra N. Sura ,  Tao Zhang

    IPC分类号： G06F9/45

    CPC分类号： G06F12/0862 ,  G06F12/0837

    摘要： Dynamically controlling a prefetching range of a software controlled cache is provided. A compiler analyzes source code to identify at least one of a plurality of loops that contain irregular memory references. For each irregular memory reference in the source code, the compiler determines whether the irregular memory reference is a candidate for optimization. Responsive to identifying an irregular memory reference that may be optimized, the complier determines whether the irregular memory reference is valid for prefetching. If the irregular memory reference is valid for prefetching, a store statement for an address of the irregular memory reference is inserted into the at least one loop. A runtime library call is inserted into a prefetch runtime library to dynamically prefetch the irregular memory references. Data associated with the irregular memory references are dynamically prefetched into the software controlled cache when the runtime library call is invoked.

    摘要翻译： 提供了动态控制软件控制缓存的预取范围。 编译器分析源代码以识别包含不规则存储器引用的多个循环中的至少一个循环。 对于源代码中的每个不规则内存引用，编译器确定不规则内存引用是否是优化的候选者。 响应于识别可优化的不规则存储器参考，编译器确定不规则存储器参考是否对预取有效。 如果不规则存储器引用对于预取有效，则将不规则存储器引用的地址的存储语句插入到至少一个循环中。 运行时库调用被插入到预取运行时库中以动态预取不规则内存引用。 当调用运行时库调用时，与不规则内存引用相关联的数据将动态预取到软件控制的高速缓存中。

    Reducing cache pollution of a software controlled cache
    8.
    发明授权
    Reducing cache pollution of a software controlled cache 失效
    降低软件控制缓存的缓存污染

    公开(公告)号：US08055849B2

    公开(公告)日：2011-11-08

    申请号：US12062587

    申请日：2008-04-04

    申请人： Tong Chen ,  Marc Gonzalez tallada ,  Zehra N. Sura ,  Tao Zhang

    发明人： Tong Chen ,  Marc Gonzalez tallada ,  Zehra N. Sura ,  Tao Zhang

    IPC分类号： G06F12/12

    CPC分类号： G06F12/0862

    摘要： Reducing cache pollution of a software controlled cache is provided. A request is received to prefetch data into the software controlled cache. A first designator is set for a first cache access to a first value. If there is the second cache access to prefetch, a determination is made as to whether data associated with the second cache access exists in the software controlled cache. If the data is in the software controlled cache, a determination is made as to whether a second value of a second designator is greater than the first value of the first cache access. If the second value fails to be greater than the first value, the position of the first cache access and the second cache access in a cache line is swapped. The first value is decremented by a predetermined amount and the second value is replaced to equal the first value.

    摘要翻译： 提供减少软件控制缓存的缓存污染。 接收到将数据预取到软件控制的高速缓存中的请求。 第一个指示符设置为第一个缓存访问第一个值。 如果存在对预取的第二高速缓存访​​问，则确定与软件控制的高速缓存中是否存在与第二高速缓存访​​问相关联的数据。 如果数据在软件控制的高速缓存中，则确定第二指示符的第二值是否大于第一高速缓存访​​问的第一值。 如果第二个值不能大于第一个值，则交换高速缓存行中的第一高速缓存访​​问和第二高速缓存访​​问的位置。 第一值减少预定量，第二值被替换为等于第一值。

    Optimized code generation targeting a high locality software cache
    10.
    发明授权
    Optimized code generation targeting a high locality software cache 失效
    针对高位置软件缓存的优化代码生成

    公开(公告)号：US08561044B2

    公开(公告)日：2013-10-15

    申请号：US12246602

    申请日：2008-10-07

    申请人： Tong Chen ,  Alexandre E. Eichenberger ,  Marc Gonzalez Tallada ,  John K. O'Brien ,  Kathryn M. O'Brien ,  Zehra N. Sura ,  Tao Zhang

    发明人： Tong Chen ,  Alexandre E. Eichenberger ,  Marc Gonzalez Tallada ,  John K. O'Brien ,  Kathryn M. O'Brien ,  Zehra N. Sura ,  Tao Zhang

    IPC分类号： G06F9/44

    CPC分类号： G06F8/4442

    摘要： Mechanisms for optimized code generation targeting a high locality software cache are provided. Original computer code is parsed to identify memory references in the original computer code. Memory references are classified as either regular memory references or irregular memory references. Regular memory references are controlled by a high locality cache mechanism. Original computer code is transformed, by a compiler, to generate transformed computer code in which the regular memory references are grouped into one or more memory reference streams, each memory reference stream having a leading memory reference, a trailing memory reference, and one or more middle memory references. Transforming of the original computer code comprises inserting, into the original computer code, instructions to execute initialization, lookup, and cleanup operations associated with the leading memory reference and trailing memory reference in a different manner from initialization, lookup, and cleanup operations for the one or more middle memory references.

    摘要翻译： 提供了针对高位置软件缓存的优化代码生成机制。 解析原始计算机代码以识别原始计算机代码中的内存引用。 内存引用被分类为常规内存引用或不规则内存引用。 常规内存引用由高位置缓存机制控制。 原始计算机代码由编译器转换以生成转换的计算机代码，其中常规存储器引用被分组成一个或多个存储器参考流，每个存储器参考流具有前导存储器引用，尾随存储器引用和一个或多个 中间内存引用。 原始计算机代码的转换包括将原始计算机代码中的指令以不同于初始化，查找和清除操作的方式与前导存储器引用和尾随存储器引用相关联的执行初始化，查找和清除操作的指令进行插入 或更多的中间内存引用。