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    • 74. 发明申请
    • Information Handling System with Immediate Scheduling of Load Operations and Fine-Grained Access to Cache Memory
    • 信息处理系统,即时调度负载操作和细粒度访问高速缓存
    • US20100268883A1
    • 2010-10-21
    • US12424332
    • 2009-04-15
    • Sanjeev GhaiGuy Lynn GuthrieStephen PowellWilliam John Starke
    • Sanjeev GhaiGuy Lynn GuthrieStephen PowellWilliam John Starke
    • G06F12/08G06F12/00
    • G06F12/0822
    • An information handling system (IHS) includes a processor with a cache memory system. The processor includes a processor core with an L1 cache memory that couples to an L2 cache memory. The processor includes an arbitration mechanism that controls load and store requests to the L2 cache memory. The arbitration mechanism includes control logic that enables a load request to interrupt a store request that the L2 cache memory is currently servicing. When the L2 cache memory finishes servicing the interrupting load request, the L2 cache memory may return to servicing the interrupted store request at the point of interruption. The control logic determines the size requirement of each load operation or store operation. When the cache memory system performs a store operation or load operation, the memory system accesses the portion of a cache line it needs to perform the operation instead of accessing an entire cache line.
    • 信息处理系统(IHS)包括具有高速缓冲存储器系统的处理器。 处理器包括具有耦合到L2高速缓冲存储器的L1高速缓冲存储器的处理器核心。 处理器包括仲裁机制,其控制对L2高速缓冲存储器的加载和存储请求。 仲裁机制包括控制逻辑,其允许加载请求中断L2高速缓冲存储器当前正在服务的存储请求。 当L2高速缓存存储器完成对中断加载请求的服务时,L2高速缓冲存储器可以在中断点返回服务中断的存储请求。 控制逻辑确定每个加载操作或存储操作的大小要求。 当高速缓冲存储器系统执行存储操作或加载操作时,存储器系统访问它需要执行操作的高速缓存行的部分,而不是访问整个高速缓存行。
    • 77. 发明授权
    • L2 cache controller with slice directory and unified cache structure
    • L2缓存控制器具有片目录和统一缓存结构
    • US07490200B2
    • 2009-02-10
    • US11054924
    • 2005-02-10
    • Leo James ClarkJames Stephen Fields, Jr.Guy Lynn GuthrieWilliam John Starke
    • Leo James ClarkJames Stephen Fields, Jr.Guy Lynn GuthrieWilliam John Starke
    • G06F12/08
    • G06F12/0851G06F12/0811
    • A cache memory logically partitions a cache array having a single access/command port into at least two slices, and uses a first cache directory to access the first cache array slice while using a second cache directory to access the second cache array slice, but accesses from the cache directories are managed using a single cache arbiter which controls the single access/command port. In the illustrative embodiment, each cache directory has its own directory arbiter to handle conflicting internal requests, and the directory arbiters communicate with the cache arbiter. An address tag associated with a load request is transmitted from the processor core with a designated bit that associates the address tag with only one of the cache array slices whose corresponding directory determines whether the address tag matches a currently valid cache entry. The cache array may be arranged with rows and columns of cache sectors wherein a given cache line is spread across sectors in different rows and columns, with at least one portion of the given cache line being located in a first column having a first latency and another portion of the given cache line being located in a second column having a second latency greater than the first latency. The cache array outputs different sectors of the given cache line in successive clock cycles based on the latency of a given sector.
    • 高速缓存存储器将具有单个访问/命令端口的高速缓存阵列逻辑地分割成至少两个切片,并且使用第一高速缓存目录访问第一高速缓存阵列切片,同时使用第二高速缓存目录来访问第二高速缓存阵列切片,但是访问 从缓存目录中使用单个缓存仲裁器来管理单个访问/命令端口。 在说明性实施例中,每个高速缓存目录具有其自己的目录仲裁器来处理冲突的内部请求,并且目录仲裁器与缓存仲裁器通信。 与处理器核心相关联的地址标签被从处理器核心以指定的位发送,指定的位将地址标签与只有一个高速缓存阵列片相关联,其相应的目录确定地址标签是否与当前有效的高速缓存条目匹配。 高速缓存阵列可以布置有高速缓存扇区的行和列,其中给定的高速缓存行分布在不同行和列中的扇区之间,其中给定高速缓存行的至少一部分位于具有第一等待时间的第一列和另一个 给定高速缓存行的一部分位于具有大于第一等待时间的第二等待时间的第二列中。 缓存阵列基于给定扇区的等待时间在连续的时钟周期中输出给定高速缓存行的不同扇区。
    • 78. 发明授权
    • Half-good mode for large L2 cache array topology with different latency domains
    • 具有不同延迟域的大型L2缓存阵列拓扑的半好模式
    • US07308537B2
    • 2007-12-11
    • US11055262
    • 2005-02-10
    • James Stephen Fields, Jr.Guy Lynn GuthrieKirk Samuel LivingstonWilliam John Starke
    • James Stephen Fields, Jr.Guy Lynn GuthrieKirk Samuel LivingstonWilliam John Starke
    • G06F12/00G06F11/00
    • G06F12/0851G06F12/126
    • A cache memory logically partitions a cache array into at least two slices each having a plurality of cache lines, with a given cache line spread across two or more cache ways of contiguous bytes and a given cache way shared between the two cache slices, and if one a cache way is defective that is part of a first cache line in the first cache slice and part of a second cache line in the second cache slice, it is disabled while continuing to use at least one other cache way which is also part of the first cache line and part of the second cache line. In the illustrative embodiment the cache array is set associative and at least two different cache ways for a given cache line contain different congruence classes for that cache line. The defective cache way can be disabled by preventing an eviction mechanism from allocating any congruence class in the defective way. For example, half of the cache line can be disabled (i.e., half of the congruence classes). The cache array may be arranged with rows and columns of cache sectors (rows corresponding to the cache ways) wherein a given cache line is further spread across sectors in different rows and columns, with at least one portion of the given cache line being located in a first column having a first latency and another portion of the given cache line being located in a second column having a second latency greater than the first latency. The cache array can also output different sectors of the given cache line in successive clock cycles based on the latency of a given sector.
    • 高速缓存存储器将高速缓存阵列逻辑地分区成至少两个切片,每个切片具有多个高速缓存行,其中给定的高速缓存行分布在连续字节的两个或多个高速缓存路径上以及在两个高速缓存片之间共享的给定高速缓存路径,如果 一个缓存方式是缺陷,其是第一高速缓存片中的第一高速缓存行和第二高速缓存片中的第二高速缓存行的一部分的一部分,其被禁用,同时继续使用至少另一种其他缓存方式,其也是 第一个缓存行和第二个缓存行的一部分。 在说明性实施例中,高速缓存阵列被设置为关联性,并且给定高速缓存行的至少两个不同的高速缓存路径包含该高速缓存行的不同的一致类。 可以通过防止驱逐机制以有缺陷的方式分配任何一致类来禁用缺陷缓存方式。 例如,可以禁用一半的高速缓存行(即,一致等级的一半)。 高速缓存阵列可以被布置成具有行和列的高速缓存扇区(对应于高速缓存路线的行),其中给定高速缓存行进一步分布在不同行和列中的扇区之间,其中给定高速缓存行的至少一部分位于 具有第一延迟的第一列和给定高速缓存行的另一部分位于具有大于第一等待时间的第二等待时间的第二列中。 缓存阵列还可以基于给定扇区的等待时间在连续的时钟周期中输出给定高速缓存行的不同扇区。