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公开(公告)号：US10235215B2
公开(公告)日：2019-03-19
申请号：US12024169
申请日：2008-02-01
摘要： A memory lock mechanism within a multi-processor system is disclosed. A lock control section is initially assigned to a data block within a system memory of the multiprocessor system. In response to a request for accessing the data block by a processing unit within the multiprocessor system, a determination is made by a memory controller whether or not the lock control section of the data block has been set. If the lock control section of the data block has been set, the request for accessing the data block is denied. Otherwise, if the lock control section of the data block has not been set, the lock control section of the data block is set, and the request for accessing the data block is allowed.
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公开(公告)号：US08312220B2
公开(公告)日：2012-11-13
申请号：US12420933
申请日：2009-04-09
申请人： Guy L. Guthrie , Harmony L. Helterhoff , William J. Starke , Phillip G. Williams , Jeffrey A. Stuecheli
发明人： Guy L. Guthrie , Harmony L. Helterhoff , William J. Starke , Phillip G. Williams , Jeffrey A. Stuecheli
IPC分类号： G06F12/08
CPC分类号： G06F12/0811 , G06F12/12
摘要： In response to a data request of a first of a plurality of processing units, the first processing unit selects a victim cache line to be castout from the lower level cache of the first processing unit and determines whether a mode is set. If not, the first processing unit issues on the interconnect fabric an LCO command identifying the victim cache line and indicating that a lower level cache is the intended destination. If the mode is set, the first processing unit issues a castout command with an alternative intended destination. In response to a coherence response to the LCO command indicating success of the LCO command, the first processing unit removes the victim cache line from its lower level cache, and the victim cache line is held elsewhere in the data processing system. The mode can be set to inhibit castouts to system memory, for example, for testing.
摘要翻译： 响应于多个处理单元中的第一处理单元的数据请求，第一处理单元从第一处理单元的较低级高速缓存中选择要丢弃的牺牲高速缓存行，并且确定是否设置了模式。 如果不是，则第一处理单元在互连结构上发出识别受害者高速缓存行的LCO命令，并指示较低级别的高速缓存是预期的目的地。 如果模式被设置，则第一处理单元发出具有替代预定目的地的停顿命令。 响应于指示LCO命令成功的LCO命令的一致性响应，第一处理单元从其较低级高速缓存中去除受害者高速缓存行，并且将受害者高速缓存行保持在数据处理系统的其他地方。 该模式可以设置为抑制系统内存的丢弃，例如进行测试。
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公开(公告)号：US08209489B2
公开(公告)日：2012-06-26
申请号：US12256064
申请日：2008-10-22
IPC分类号： G06F12/08
CPC分类号： G06F12/0862 , G06F12/0897 , Y02D10/13
摘要： A processing unit for a multiprocessor data processing system includes a processor core and a cache hierarchy coupled to the processor core to provide low latency data access. The cache hierarchy includes an upper level cache coupled to the processor core and a lower level victim cache coupled to the upper level cache. In response to a prefetch request of the processor core that misses in the upper level cache, the lower level victim cache determines whether the prefetch request misses in the directory of the lower level victim cache and, if so, allocates a state machine in the lower level victim cache that services the prefetch request by issuing the prefetch request to at least one other processing unit of the multiprocessor data processing system.
摘要翻译： 用于多处理器数据处理系统的处理单元包括处理器核心和耦合到处理器核心的高速缓存层级以提供低延迟数据访问。 高速缓存层级包括耦合到处理器核心的高级缓存和耦合到高级缓存的较低级别的牺牲缓存。 响应于在高级缓存中丢失的处理器核心的预取请求，较低级别的受害者缓存确定预取请求是否丢失在较低级别的受害者缓存的目录中，并且如果是，则在下级缓存中分配状态机 通过向多处理器数据处理系统的至少一个其他处理单元发出预取请求来服务于预取请求。
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公开(公告)号：US08205136B2
公开(公告)日：2012-06-19
申请号：US12189808
申请日：2008-08-12
IPC分类号： G11C29/00
CPC分类号： G11C29/832 , G06F11/1064
摘要： A method of handling a stuck bit in a directory of a cache memory, by defining multiple binary encodings to indicate a defective cache state, detecting an error in a tag stored in a member of the directory (wherein the tag at least includes an address field, a state field and an error-correction field), determining that the error is associated with a stuck bit of the directory member, and writing new state information to the directory member which is selected from one of the binary encodings based on a field location of the stuck bit within the directory member. The multiple binary encodings may include a first binary encoding when the stuck bit is in the address field, a second binary encoding when the stuck bit is in the state field, and a third binary encoding when the stuck bit is in the error-correction field. The new state information may also further be selected based on the value of the stuck bit, e.g., a state bit corresponding to the stuck bit is assigned a bit value from the new state information which matches the value of the stuck bit.
摘要翻译： 一种通过定义多个二进制编码来指示缺陷高速缓存状态来处理高速缓冲存储器的目录中的卡住位的方法，检测存储在目录成员中的标签中的错误（其中标签至少包括地址字段 ，状态字段和纠错字段），确定错误与目录成员的卡住位相关联，并且基于字段位置将新状态信息写入从二进制编码之一中选择的目录成员 的目录成员中的卡住位。 多个二进制编码可以包括当卡住位在地址字段中时的第一二进制编码，当卡位位于状态字段时的第二二进制编码，以及当卡位位于错误校正字段中时的第三二进制编码 。 还可以基于卡住位的值进一步选择新的状态信息，例如，对应于该卡住位的状态位从与该卡位的值匹配的新状态信息中分配一位值。
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85.发明申请Empirically Based Dynamic Control of Transmission of Victim Cache Lateral Castouts 有权基于经验的动态控制受害者缓存横向铸件传动公开(公告)号：US20100262778A1
公开(公告)日：2010-10-14
申请号：US12421180
申请日：2009-04-09
申请人： Robert A. Cargnoni , Guy L. Guthrie , Harmony L. Helterhoff , William J. Starke , Jeffrey A. Stuecheli , Phillip G. Williams
发明人： Robert A. Cargnoni , Guy L. Guthrie , Harmony L. Helterhoff , William J. Starke , Jeffrey A. Stuecheli , Phillip G. Williams
IPC分类号： G06F12/08
CPC分类号： G06F12/0897 , G06F12/0811 , G06F12/0862 , G06F12/127 , G06F2212/6026
摘要： In response to a data request, a victim cache line is selected for castout from a lower level cache, and a target lower level cache of one of the plurality of processing units is selected. A determination is made whether the selected target lower level cache has provided more than a threshold number of retry responses to lateral castout (LCO) commands of the first lower level cache, and if so, a different target lower level cache is selected. The first processing unit thereafter issues a LCO command on the interconnect fabric. The LCO command identifies the victim cache line to be castout and indicates that the target lower level cache is an intended destination of the victim cache line. In response to a successful coherence response to the LCO command, the victim cache line is removed from the first lower level cache and held in the second lower level cache.
摘要翻译： 响应于数据请求，选择从较低级别高速缓冲存储器进行丢弃的受害者高速缓存行，并且选择多个处理单元之一的目标下级高速缓存。 确定所选择的目标下层高速缓存是否为第一较低级别高速缓存的横向转移（LCO）命令提供了超过阈值数量的重试响应，如果是，则选择不同的目标低级高速缓存。 此后，第一处理单元在互连结构上发出LCO命令。 LCO命令标识要丢弃的受害者缓存行，并指示目标下级缓存是受害缓存行的预期目标。 响应于对LCO命令的成功的一致性响应，从第一低级缓存中移除受害者高速缓存行并保存在第二较低级缓存中。
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86.发明授权Data processing system, method and interconnect fabric supporting destination data tagging 失效数据处理系统，方法和互连结构支持目标数据标记公开(公告)号：US07761631B2
公开(公告)日：2010-07-20
申请号：US12117539
申请日：2008-05-08
申请人： Leo J. Clark , James S. Fields, Jr. , Guy L. Guthrie , William J. Starke , Jeffrey A. Stuecheli
发明人： Leo J. Clark , James S. Fields, Jr. , Guy L. Guthrie , William J. Starke , Jeffrey A. Stuecheli
CPC分类号： G06F15/16
摘要： A data processing system includes a plurality of communication links and a plurality of processing units including a local master processing unit. The local master processing unit includes interconnect logic that couples the processing unit to one or more of the plurality of communication links and an originating master coupled to the interconnect logic. The originating master originates an operation by issuing a write-type request on at least one of the one or more communication links, receives from a snooper in the data processing system a destination tag identifying a route to the snooper, and, responsive to receipt of the combined response and the destination tag, initiates a data transfer including a data payload and a data tag identifying the route provided within the destination tag.
摘要翻译： 数据处理系统包括多个通信链路和包括本地主处理单元的多个处理单元。 本地主处理单元包括将处理单元耦合到多个通信链路中的一个或多个以及耦合到互连逻辑的始发主机的互连逻辑。 始发主机通过在一个或多个通信链路中的至少一个发出写入请求来发起操作，从数据处理系统中的窥探者接收标识到窥探者的路由的目的地标签，并且响应于接收到 组合响应和目的地标签，发起包括数据有效载荷和标识目的地标签内提供的路由的数据标签的数据传输。
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公开(公告)号：US20100100682A1
公开(公告)日：2010-04-22
申请号：US12256002
申请日：2008-10-22
申请人： Guy L. Guthrie , Thomas L. Jeremiah , William L. McNeil , Piyush C. Patel , William J. Starke , Jeffrey A. Stuecheli
发明人： Guy L. Guthrie , Thomas L. Jeremiah , William L. McNeil , Piyush C. Patel , William J. Starke , Jeffrey A. Stuecheli
IPC分类号： G06F12/08
CPC分类号： G06F12/0897 , G06F12/0811 , G06F12/0831 , G06F12/0862 , G06F12/128 , G06F2212/1028 , Y02D10/13
摘要： A data processing system includes a processor core having an associated upper level cache and a lower level victim cache. In response to a memory access request of the processor core that specifies a non-modifying access to a target coherency granule, a determination is made whether the memory access request hits or misses in a directory of the lower level victim cache. In response to determining that the memory access request hits in the lower level victim cache in a data-valid coherence state, the lower level victim cache provides the target coherency granule of the memory access request to the upper level cache. The lower level victim cache preserves the target coherency granule in the lower level victim cache in a shared coherence state if the memory access request is of a first type and invalidates the target coherency granule if the memory access request is of a second type.
摘要翻译： 数据处理系统包括具有相关联的高级缓存和较低级别的受害缓存的处理器核心。 响应于指定对目标一致性粒子的不修改访问的处理器核心的存储器访问请求，确定存储器访问请求是否在较低级别的受害缓存的目录中命中或丢失。 响应于确定存储器访问请求在数据有效的相干状态中击中较低级别的受害者高速缓存，则较低级别的受害者缓存将存储器访问请求的目标一致性颗粒提供给高级缓存。 如果存储器访问请求是第一类型，则较低级别的受害者缓存在共享相干状态下保留较低级别的受害者缓存中的目标一致性粒子，如果存储器访问请求是第二类型，则使目标一致性粒子无效。
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公开(公告)号：US07689891B2
公开(公告)日：2010-03-30
申请号：US11225640
申请日：2005-09-13
IPC分类号： G11C29/00
CPC分类号： G06F11/1064
摘要： A method of handling a stuck bit in a directory of a cache memory which detects an error in a stored tag having an address field, a state field and an error-correction field, determines that the error is associated with a stuck bit of the directory member, marks the directory member as defective, and casts out corrected address information. The error is detected during processing of a cache directory access request, and is determined to be associated with a stuck bit of the directory member by attempting to correct a first error and then detecting a second error after the first correction attempt. The address information is cast out by routing a surrogate tag contained in a surrogate member of the cache directory through error-correction pipeline circuitry while transmitting the address information from the surrogate member to a cast-out machine.
摘要翻译： 一种处理高速缓冲存储器的目录中的卡住位的方法，该高速缓冲存储器的目录中检测到具有地址字段，状态字段和纠错字段的存储标签中的错误，确定该错误与该目录的卡住位相关联 会员，将目录成员标记为有缺陷，并丢弃修正的地址信息。 在处理高速缓存目录访问请求期间检测到错误，并且通过尝试校正第一错误然后在第一次校正尝试之后检测第二错误来确定与目录成员的卡住位相关联。 通过错误校正流水线电路路由包含在高速缓存目录的代理成员中的代理标签，同时将地址信息从代理成员发送到投放机器，来丢弃地址信息。
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89.发明申请Method and Apparatus for Handling Multiple Memory Requests Within a Multiprocessor System 有权在多处理器系统中处理多个存储器请求的方法和装置公开(公告)号：US20090198933A1
公开(公告)日：2009-08-06
申请号：US12024181
申请日：2008-02-01
IPC分类号： G06F12/14
CPC分类号： G06F9/526
摘要： A method for handling multiple memory requests within a multi-processor system is disclosed. A lock control section is initially assigned to a data block within a system memory. In response to a request for accessing the data block by a processing unit, a determination is made whether or not the lock control section of the data block has been set. If the lock control section has been set, another determination is made whether or not the requesting processing unit is located beyond a predetermined distance from a memory controller. If the requesting processing unit is located beyond a predetermined distance from the memory controller, the requesting processing unit is invited to perform other functions; otherwise, the number of the requesting processing unit is placed in a queue table. However, if the lock control section has not been set, the lock control section of the data block is set, and the access request is allowed.
摘要翻译： 公开了一种在多处理器系统内处理多个存储器请求的方法。 锁控制部分最初被分配给系统存储器内的数据块。 响应于由处理单元访问数据块的请求，确定数据块的锁定控制部分是否已经被设置。 如果已经设置了锁定控制部分，则另外确定请求处理单元是否位于距离存储器控制器超过预定距离的位置。 如果请求处理单元位于距存储器控制器超过预定距离的位置，则请求处理单元被邀请执行其他功能; 否则，请求处理单元的号码被放置在队列表中。 然而，如果锁定控制部分尚未设置，则数据块的锁定控制部分被设置，并且允许访问请求。
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90.发明授权Data processing system, cache system and method for issuing a request on an interconnect fabric without reference to a lower level cache based upon a tagged cache state 有权数据处理系统，缓存系统和方法，用于基于标记的高速缓存状态在不引用低级缓存的情况下在互连结构上发出请求公开(公告)号：US07536513B2
公开(公告)日：2009-05-19
申请号：US11095734
申请日：2005-03-31
CPC分类号： G06F12/0811 , G06F12/0815 , G06F12/0831
摘要： In response to a master receiving a memory access request indicating a target address, the master accesses a first cache directory of an upper level cache of a cache hierarchy. In response to the target address being associated in the first cache directory with an entry having a valid address tag and a first invalid coherency state, the master issues a request specifying the target address on an interconnect fabric without regard to a coherency state associated with the target address in a second cache directory of a lower level cache of the cache hierarchy. In response to the target address having a second invalid coherency state with respect to the first cache directory, the master issues a request specifying the target address on an interconnect fabric after determining a coherency state associated with the target address in the second cache directory of the lower level cache of the cache hierarchy.
摘要翻译： 响应于主机接收到指示目标地址的存储器访问请求，主机访问高速缓存层级的高级缓存的第一高速缓存目录。 响应于目标地址与具有有效地址标签的条目和第一无效一致性状态在第一高速缓存目录中相关联的目标地址，主机在不考虑与该互连结构相关联的一致性状态的情况下发布指定互连结构上的目标地址的请求 目标地址在缓存层次结构的较低级缓存的第二高速缓存目录中。 响应于相对于第一高速缓存目录具有第二无效一致性状态的目标地址，主机在确定与第二高速缓存目录中的目标地址相关联的一致性状态之后，在互连结构上发出指定目标地址的请求 缓存层次结构的较低级缓存。
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