公开(公告)号：US20130205099A1

公开(公告)日：2013-08-08

申请号：US13368987

申请日：2012-02-08

申请人： Guy L. Guthrie ,  Hien M. Le ,  Hugh Shen ,  Jeff A. Stuecheli ,  Derek E. Williams

发明人： Guy L. Guthrie ,  Hien M. Le ,  Hugh Shen ,  Jeff A. Stuecheli ,  Derek E. Williams

IPC分类号： G06F12/08

CPC分类号： G06F12/0831 ,  G06F2212/1008 ,  G06F2212/1016

摘要： A multiprocessor data processing system includes a plurality of cache memories including a cache memory. The cache memory issues a read-type operation for a target cache line. While waiting for receipt of the target cache line, the cache memory monitors to detect a competing store-type operation for the target cache line. In response to receiving the target cache line, the cache memory installs the target cache line in the cache memory, and sets a coherency state of the target cache line installed in the cache memory based on whether the competing store-type operation is detected.

公开(公告)号：US20130205098A1

公开(公告)日：2013-08-08

申请号：US13368958

申请日：2012-02-08

申请人： Guy L. Guthrie ,  Hien M. Le ,  Jeff A. Stuecheli ,  Derek E. Williams

发明人： Guy L. Guthrie ,  Hien M. Le ,  Jeff A. Stuecheli ,  Derek E. Williams

IPC分类号： G06F12/08

CPC分类号： G06F12/0897 ,  G06F12/0811

摘要： A multiprocessor data processing system includes a plurality of cache memories including a cache memory. In response to the cache memory detecting a storage-modifying operation specifying a same target address as that of a first read-type operation being processed by the cache memory, the cache memory provides a retry response to the storage-modifying operation. In response to completion of the read-type operation, the cache memory enters a referee mode. While in the referee mode, the cache memory temporarily dynamically increases priority of any storage-modifying operation targeting the target address in relation to any second read-type operation targeting the target address.

公开(公告)号：US08856455B2

公开(公告)日：2014-10-07

申请号：US13433022

申请日：2012-03-28

申请人： Sanjeev Ghai ,  Guy L. Guthrie ,  William J. Starke ,  Jeff A. Stuecheli ,  Derek E. Williams ,  Phillip G. Williams

发明人： Sanjeev Ghai ,  Guy L. Guthrie ,  William J. Starke ,  Jeff A. Stuecheli ,  Derek E. Williams ,  Phillip G. Williams

IPC分类号： G06F12/02 ,  G06F12/08

CPC分类号： G06F12/0815 ,  G06F12/0804 ,  G06F12/0817 ,  G06F12/0897 ,  G06F12/126

摘要： A data processing system includes a processor core supported by upper and lower level caches. In response to executing a deallocate instruction in the processor core, a deallocation request is sent from the processor core to the lower level cache, the deallocation request specifying a target address associated with a target cache line. In response to receipt of the deallocation request at the lower level cache, a determination is made if the target address hits in the lower level cache. In response to determining that the target address hits in the lower level cache, the target cache line is retained in a data array of the lower level cache and a replacement order field in a directory of the lower level cache is updated such that the target cache line is more likely to be evicted from the lower level cache in response to a subsequent cache miss.

摘要翻译： 数据处理系统包括由上层和下层高速缓存支持的处理器核心。 响应于在处理器核心中执行取消分配指令，从处理器核心向下级高速缓存发送解除分配请求，所述释放请求指定与目标高速缓存行相关联的目标地址。 响应于在较低级别高速缓存处接收到解除分配请求，确定目标地址是否在较低级别高速缓存中。 为了响应于确定目标地址在较低级别高速缓存中的命中，目标高速缓存行被保留在较低级别高速缓存的数据阵列中，并且更新下级高速缓存的目录中的替换顺序字段，使得目标高速缓存 线路可能会响应于后续的高速缓存未命中而从较低级别的缓存中逐出。

公开(公告)号：US08874852B2

公开(公告)日：2014-10-28

申请号：US13433048

申请日：2012-03-28

申请人： Sanjeev Ghai ,  Guy L. Guthrie ,  William J. Starke ,  Jeff A. Stuecheli ,  Derek E. Williams ,  Phillip G. Williams

发明人： Sanjeev Ghai ,  Guy L. Guthrie ,  William J. Starke ,  Jeff A. Stuecheli ,  Derek E. Williams ,  Phillip G. Williams

IPC分类号： G06F12/08

CPC分类号： G06F12/0817 ,  G06F12/0804 ,  G06F12/121 ,  G06F12/122 ,  G06F12/126

摘要： In response to executing a deallocate instruction, a deallocation request specifying a target address of a target cache line is sent from a processor core to a lower level cache. In response, a determination is made if the target address hits in the lower level cache. If so, the target cache line is retained in a data array of the lower level cache, and a replacement order field of the lower level cache is updated such that the target cache line is more likely to be evicted in response to a subsequent cache miss in a congruence class including the target cache line. In response to the subsequent cache miss, the target cache line is cast out to the lower level cache with an indication that the target cache line was a target of a previous deallocation request of the processor core.

摘要翻译： 响应于执行取消分配指令，将指定目标高速缓存行的目标地址的解除分配请求从处理器核发送到较低级高速缓存。 作为响应，确定目标地址是否在较低级别高速缓存中。 如果是这样，则目标高速缓存行被保留在较低级高速缓存的数据阵列中，并且更新较低级高速缓存的替换顺序字段，使得目标高速缓存行更可能响应于后续高速缓存未命中而被驱逐 在包含目标缓存行的同余类中。 响应于随后的高速缓存未命中，目标高速缓存行被推出到较低级缓存，指示目标高速缓存行是处理器核心的先前释放请求的目标。

公开(公告)号：US20130262777A1

公开(公告)日：2013-10-03

申请号：US13433022

申请日：2012-03-28

申请人： Sanjeev Ghai ,  Guy L. Guthrie ,  William J. Starke ,  Jeff A. Stuecheli ,  Derek E. Williams ,  Phillip G. Williams

发明人： Sanjeev Ghai ,  Guy L. Guthrie ,  William J. Starke ,  Jeff A. Stuecheli ,  Derek E. Williams ,  Phillip G. Williams

IPC分类号： G06F12/12

CPC分类号： G06F12/0815 ,  G06F12/0804 ,  G06F12/0817 ,  G06F12/0897 ,  G06F12/126

摘要： A data processing system includes a processor core supported by upper and lower level caches. In response to executing a deallocate instruction in the processor core, a deallocation request is sent from the processor core to the lower level cache, the deallocation request specifying a target address associated with a target cache line. In response to receipt of the deallocation request at the lower level cache, a determination is made if the target address hits in the lower level cache. In response to determining that the target address hits in the lower level cache, the target cache line is retained in a data array of the lower level cache and a replacement order field in a directory of the lower level cache is updated such that the target cache line is more likely to be evicted from the lower level cache in response to a subsequent cache miss.

摘要翻译： 数据处理系统包括由上层和下层高速缓存支持的处理器核心。 响应于在处理器核心中执行取消分配指令，从处理器核心向下级高速缓存发送解除分配请求，所述释放请求指定与目标高速缓存行相关联的目标地址。 响应于在较低级别高速缓存处接收到解除分配请求，确定目标地址是否在较低级别高速缓存中。 为了响应于确定目标地址在较低级别高速缓存中的命中，目标高速缓存行被保留在较低级别高速缓存的数据阵列中，并且更新下级高速缓存的目录中的替换顺序字段，使得目标高速缓存 线路可能会响应于后续的高速缓存未命中而从较低级别的缓存中逐出。

公开(公告)号：US20130262778A1

公开(公告)日：2013-10-03

申请号：US13433048

申请日：2012-03-28

申请人： Sanjeev Ghai ,  Guy L. Guthrie ,  William J. Starke ,  Jeff A. Stuecheli ,  Derek E. Williams ,  Phillip G. Williams

发明人： Sanjeev Ghai ,  Guy L. Guthrie ,  William J. Starke ,  Jeff A. Stuecheli ,  Derek E. Williams ,  Phillip G. Williams

IPC分类号： G06F12/12

CPC分类号： G06F12/0817 ,  G06F12/0804 ,  G06F12/121 ,  G06F12/122 ,  G06F12/126

摘要： In response to executing a deallocate instruction, a deallocation request specifying a target address of a target cache line is sent from a processor core to a lower level cache. In response, a determination is made if the target address hits in the lower level cache. If so, the target cache line is retained in a data array of the lower level cache, and a replacement order field of the lower level cache is updated such that the target cache line is more likely to be evicted in response to a subsequent cache miss in a congruence class including the target cache line. In response to the subsequent cache miss, the target cache line is cast out to the lower level cache with an indication that the target cache line was a target of a previous deallocation request of the processor core.

摘要翻译： 响应于执行取消分配指令，将指定目标高速缓存行的目标地址的解除分配请求从处理器核发送到较低级高速缓存。 作为响应，确定目标地址是否在较低级别高速缓存中。 如果是这样，则目标高速缓存行被保留在较低级高速缓存的数据阵列中，并且更新较低级高速缓存的替换顺序字段，使得目标高速缓存行更可能响应于后续高速缓存未命中而被驱逐 在包含目标缓存行的同余类中。 响应于随后的高速缓存未命中，目标高速缓存行被推出到较低级缓存，指示目标高速缓存行是处理器核心的先前释放请求的目标。

公开(公告)号：US20100235584A1

公开(公告)日：2010-09-16

申请号：US12402025

申请日：2009-03-11

申请人： Guy L. Guthrie ,  Hien M. Le ,  Alvan W. Ng ,  Michael S. Siegel ,  Derek E. Williams ,  Phillip G. Williams

发明人： Guy L. Guthrie ,  Hien M. Le ,  Alvan W. Ng ,  Michael S. Siegel ,  Derek E. Williams ,  Phillip G. Williams

IPC分类号： G06F12/08 ,  G06F12/00

CPC分类号： G06F12/0811 ,  G06F12/0815 ,  G06F12/0831 ,  G06F12/0833 ,  G06F12/12 ,  G06F12/128

摘要： A victim cache line having a data-invalid coherence state is selected for castout from a first lower level cache of a first processing unit. The first processing unit issues on an interconnect fabric a lateral castout (LCO) command identifying the victim cache line to be castout from the first lower level cache, indicating the data-invalid coherence state, and indicating that a lower level cache is an intended destination of the victim cache line. In response to a coherence response to the LCO command indicating success of the LCO command, the victim cache line is removed from the first lower level cache and held in a second lower level cache of a second processing unit in the data-invalid coherence state.

摘要翻译： 选择具有数据无效相干状态的受害者缓存线，用于从第一处理单元的第一较低级缓存进行舍入。 第一处理单元在互连结构上发出用于标识要从第一较低级高速缓存丢弃的受害缓存行的横向聚合（LCO）命令，指示数据无效相干状态，并指示较低级别高速缓存是预期目的地 的受害者缓存行。 响应于指示LCO命令成功的LCO命令的一致性响应，从第一低级缓存中移除受害者高速缓存行并将其保存在数据无效一致状态中的第二处理单元的第二较低级高速缓存中。

公开(公告)号：US08949540B2

公开(公告)日：2015-02-03

申请号：US12402025

申请日：2009-03-11

申请人： Guy L. Guthrie ,  Hien M. Le ,  Alvan W. Ng ,  Michael S. Siegel ,  Derek E. Williams ,  Phillip G. Williams

发明人： Guy L. Guthrie ,  Hien M. Le ,  Alvan W. Ng ,  Michael S. Siegel ,  Derek E. Williams ,  Phillip G. Williams

IPC分类号： G06F12/02 ,  G06F12/08 ,  G06F12/12

CPC分类号： G06F12/0811 ,  G06F12/0815 ,  G06F12/0831 ,  G06F12/0833 ,  G06F12/12 ,  G06F12/128

摘要： A victim cache line having a data-invalid coherence state is selected for castout from a first lower level cache of a first processing unit. The first processing unit issues on an interconnect fabric a lateral castout (LCO) command identifying the victim cache line to be castout from the first lower level cache, indicating the data-invalid coherence state, and indicating that a lower level cache is an intended destination of the victim cache line. In response to a coherence response to the LCO command indicating success of the LCO command, the victim cache line is removed from the first lower level cache and held in a second lower level cache of a second processing unit in the data-invalid coherence state.

摘要翻译： 选择具有数据无效相干状态的受害者缓存线，用于从第一处理单元的第一较低级缓存进行舍入。 第一处理单元在互连结构上发出用于标识要从第一较低级高速缓存丢弃的受害缓存行的横向聚合（LCO）命令，指示数据无效相干状态，并指示较低级别高速缓存是预期目的地 的受害者缓存行。 响应于指示LCO命令成功的LCO命令的一致性响应，从第一低级缓存中移除受害者高速缓存行并将其保存在数据无效一致状态中的第二处理单元的第二较低级高速缓存中。

公开(公告)号：US08656121B2

公开(公告)日：2014-02-18

申请号：US13109254

申请日：2011-05-17

申请人： Guy L. Guthrie ,  Geraint North ,  William J. Starke ,  Derek E. Williams

发明人： Guy L. Guthrie ,  Geraint North ,  William J. Starke ,  Derek E. Williams

IPC分类号： G06F12/00

CPC分类号： G06F9/30076 ,  G06F12/0815 ,  G06F12/0875 ,  G06F12/1027 ,  G06F12/1425 ,  G06F21/79 ,  G06F2212/452

摘要： Fine-grained detection of data modification of original data is provided by associating separate guard bits with granules of memory storing original data from which translated data has been obtained. The guard bits indicating whether the original data stored in the associated granule is protected for data coherency. The guard bits are set and cleared by special-purpose instructions. Responsive to attempting access to translated data obtained from the original data, the guard bit(s) associated with the original data is checked to determine whether the guard bit(s) fail to indicate coherency of the original data, and if so, discarding of the translated data is initiated to facilitate maintaining data coherency between the original data and the translated data.

摘要翻译： 通过将单独的保护位与存储已经获得翻译数据的原始数据的存储器的颗粒相关联来提供对原始数据的数据修改的细粒度检测。 保护位指示存储在相关联的粒子中的原始数据是否受到数据一致性的保护。 保护位通过专用指令进行设置和清除。 响应于尝试访问从原始数据获得的翻译数据，检查与原始数据相关联的保护位，以确定保护位是否不能指示原始数据的一致性，如果是，则丢弃 启动翻译的数据以便于维持原始数据和翻译数据之间的数据一致性。

公开(公告)号：US08645644B2

公开(公告)日：2014-02-04

申请号：US13451682

申请日：2012-04-20

申请人： Guy L. Guthrie ,  Geraint North ,  William J. Starke ,  Derek E. Williams

发明人： Guy L. Guthrie ,  Geraint North ,  William J. Starke ,  Derek E. Williams

IPC分类号： G06F12/00

CPC分类号： G06F9/30076 ,  G06F12/0815 ,  G06F12/0875 ,  G06F12/1027 ,  G06F12/1425 ,  G06F21/79 ,  G06F2212/452

摘要： A method is provided for fine-grained detection of data modification of original data by associating separate guard bits with granules of memory storing original data from which translated data has been obtained. The guard bits indicating whether the original data stored in the associated granule is protected for data coherency. The guard bits are set and cleared by special-purpose instructions. Responsive to attempting access to translated data obtained from the original data, the guard bit(s) associated with the original data is checked to determine whether the guard bit(s) fail to indicate coherency of the original data, and if so, discarding of the translated data is initiated to facilitate maintaining data coherency between the original data and the translated data.

摘要翻译： 提供了一种通过将单独的保护位与存储已经获得翻译数据的原始数据的存储器的颗粒相关联的方法来对原始数据的数据修改进行细粒度检测。 保护位指示存储在相关联的粒子中的原始数据是否受到数据一致性的保护。 保护位通过专用指令进行设置和清除。 响应于尝试访问从原始数据获得的翻译数据，检查与原始数据相关联的保护位，以确定保护位是否不能指示原始数据的一致性，如果是，则丢弃 启动翻译的数据以便于维持原始数据和翻译数据之间的数据一致性。