公开(公告)号：US06622235B1

公开(公告)日：2003-09-16

申请号：US09476204

申请日：2000-01-03

申请人： James B. Keller ,  Ramsey W. Haddad ,  Stephan G. Meier

发明人： James B. Keller ,  Ramsey W. Haddad ,  Stephan G. Meier

IPC分类号： G06F938

CPC分类号： G06F9/3861 ,  G06F9/3836 ,  G06F9/3838 ,  G06F9/384 ,  G06F9/3857 ,  G06F9/3859

摘要： A scheduler issues memory operations without regard to whether or not resources are available to handle each possible execution outcome of that memory operation. The scheduler also retains the memory operation after issuance. If a condition occurs which prevents correct execution of the memory operation, the memory operation is retried. The scheduler subsequently reschedules and reissues the memory operation in response to the retry. Additionally, the scheduler may receive a retry type indicating the reason for retry. Certain retry types may indicate a delayed reissuance of the memory operation until the occurrence of a subsequent event. In response to such retry types, the scheduler monitors for the subsequent event and delays reissuance until the event is detected. The scheduler may include a physical address buffer to detect a load memory operation which incorrectly issued prior to an older store memory operation upon which it is dependent for the memory operation. The scheduler may also include a store tag buffer to detect that a load memory operation is to be reissued due to the reissuance of a store memory operation on which the load was determined to be dependent during the previous execution of the load memory operation.

摘要翻译： 调度器发出存储器操作，而不考虑资源是否可用于处理该存储器操作的每个可能的执行结果。 调度程序也保留发行后的内存操作。 如果发生阻止正确执行存储器操作的条件，则重试存储器操作。 调度器随后重新调度并重新发出响应于重试的存储器操作。 此外，调度器可以接收指示重试原因的重试类型。 某些重试类型可能指示存储器操作的延迟重新发布，直到发生后续事件。 响应于这种重试类型，调度器监视后续事件并延迟重新发布，直到检测到事件。 调度器可以包括物理地址缓冲器，以检测在其依赖于存储器操作的较旧的存储存储器操作之前错误地发出的加载存储器操作。 调度器还可以包括存储标签缓冲器，以检测由于在先前执行加载存储器操作期间确定负载被确定为依赖的存储存储器操作的重新发布，将重新发布加载存储器操作。

公开(公告)号：US06542984B1

公开(公告)日：2003-04-01

申请号：US09476578

申请日：2000-01-03

申请人： James B. Keller ,  Ramsey W. Haddad ,  Stephan G. Meier

发明人： James B. Keller ,  Ramsey W. Haddad ,  Stephan G. Meier

IPC分类号： G06F1576

CPC分类号： G06F9/3861 ,  G06F9/3826 ,  G06F9/3834 ,  G06F9/3838 ,  G06F9/3842 ,  G06F9/3859

摘要： A scheduler issues instruction operations for execution, but also retains the instruction operations. If a particular instruction operation is subsequently found to be incorrectly executed, the particular instruction operation may be reissued from the scheduler. The penalty for incorrect scheduling of instruction operations may be reduced as compared to purging the particular instruction operation and younger instruction operations from the pipeline and refetching the particular instruction operation. Furthermore, the scheduler may employ a more aggressive scheduling mechanism since the penalty for incorrect execution is reduced. Additionally, the scheduler maintains the dependency indications for each instruction operation which has been issued. If the particular instruction operation is reissued, the instruction operations which are dependent on the particular instruction operation (directly or indirectly) may be identified via the dependency indications. The scheduler reissues the dependent instruction operations as well. Instruction operations which are subsequent to the particular instruction operation in program order but which are not dependent on the particular instruction operation are not reissued. Accordingly, the penalty for incorrect scheduling of instruction operations may be further decreased over the purging of the particular instruction and all younger instruction operations and refetching the particular instruction operation.

摘要翻译： 调度器执行指令操作，还保留指令操作。 如果随后发现特定的指令操作被错误地执行，则可以从调度器重新发出特定的指令操作。 与从流水线中清除特定的指令操作和更年轻的指令操作以及重新指定特定的指令操作相比，指令操作的不正确调度的惩罚可能会减少。 此外，调度器可以采用更积极的调度机制，因为减少了错误执行的惩罚。 此外，调度器维护已发出的每个指令操作的依赖指示。 如果重新发出特定的指令操作，则可以通过依赖指示来识别依赖于特定指令操作（直接或间接）的指令操作。 调度程序也重新发出相关的指令操作。 不按照程序顺序执行特定指令操作但不依赖于特定指令操作的指令操作不重新发行。 因此，可以通过清除特定指令和所有更年轻的指令操作并重新获取特定的指令操作来进一步减少对指令操作的不正确调度的惩罚。

公开(公告)号：US06564315B1

公开(公告)日：2003-05-13

申请号：US09476322

申请日：2000-01-03

申请人： James B. Keller ,  Ramsey W. Haddad ,  Stephan G. Meier

发明人： James B. Keller ,  Ramsey W. Haddad ,  Stephan G. Meier

IPC分类号： G06F9312

CPC分类号： G06F9/3842 ,  G06F9/3836 ,  G06F9/3838 ,  G06F9/384 ,  G06F9/3857 ,  G06F9/3859 ,  G06F9/3861

摘要： A scheduler issues instruction operations for execution, but also retains the instruction operations. If a particular instruction operation is subsequently found to be required to execute non-speculatively, the particular instruction operation is still stored in the scheduler. Subsequent to determining that the particular operation has become non-speculative (through the issuance and execution of instruction operations prior to the particular instruction operation), the particular instruction operation may be reissued from the scheduler. The penalty for incorrect scheduling of instruction operations which are to execute non-speculatively may be reduced as compared to purging the particular instruction operation and younger instruction operations from the pipeline and refetching the particular instruction operation. Additionally, the scheduler may maintain the dependency indications for each instruction operation which has been issued. If the particular instruction operation is reissued, the instruction operations which are dependent on the particular instruction operation (directly or indirectly) may be identified via the dependency indications. The scheduler reissues the dependent instruction operations as well. Instruction operations which are subsequent to the particular instruction operation in program order but which are not dependent on the particular instruction operation are not reissued. Accordingly, the penalty for incorrect scheduling of instruction operations which are to be executed non-speculatively may be further decreased over the purging of the particular instruction and all younger instruction operations and refetching the particular instruction operation.

摘要翻译： 调度器执行指令操作，还保留指令操作。 如果随后发现特定的指令操作被要求非推测地执行，则特定的指令操作仍然存储在调度器中。 在确定特定操作已经变得不推测（通过在特定指令操作之前发出和执行指令操作）之后，特定指令操作可以从调度器重新发行。 与从流水线中清除特定的指令操作和较年轻的指令操作以及重新指定特定的指令操作相比，与推测性地执行的指令操作的不正确调度的惩罚可能会减少。 此外，调度器可以维护已经发出的每个指令操作的依赖指示。 如果重新发出特定的指令操作，则可以通过依赖指示来识别依赖于特定指令操作（直接或间接）的指令操作。 调度程序也重新发出相关的指令操作。 不按照程序顺序执行特定指令操作但不依赖于特定指令操作的指令操作不重新发行。 相应地，可以通过清除特定指令和所有更年轻的指令操作并重新获取特定的指令操作来进一步减少非推测性地执行不正确地调度指令操作的惩罚。

公开(公告)号：US06704854B1

公开(公告)日：2004-03-09

申请号：US09433185

申请日：1999-10-25

申请人： Stephan G. Meier ,  James B. Keller

发明人： Stephan G. Meier ,  James B. Keller

IPC分类号： G06F930

CPC分类号： G06F9/3836 ,  G06F9/30043 ,  G06F9/3824 ,  G06F9/3885

摘要： A processor includes execution resources for handling a first memory operation and a concurrent second memory operation. If one of the memory operations is misaligned, the processor may allocate the execution resources for the other memory operation to that memory operation. In one embodiment, the older memory operation proceeds if misalignment is detected. The younger memory operation is retried and may be reexecuted at a later time. If the older memory operation is misaligned, the execution resources provided for the younger operation may be allocated to the older memory operation. If only the younger memory operation is misaligned, the younger memory operation may be the older memory operation during a subsequent reexecution and may thus be allocated the execution resources to allow the memory operation to complete.

摘要翻译： 处理器包括用于处理第一存储器操作和并行第二存储器操作的执行资源。 如果其中一个存储器操作未对准，则处理器可以将该另一存储器操作的执行资源分配给该存储器操作。 在一个实施例中，如果检测到未对准，则旧的存储器操作进行。 较年轻的内存操作被重试，可能会在以后重新执行。 如果较旧的内存操作未对齐，则为年轻操作提供的执行资源可能会分配给较旧的内存操作。 如果仅较年轻的存储器操作未对准，则较小的存储器操作可能是在随后的重新执行期间较旧的存储器操作，因此可以分配执行资源以允许存储器操作完成。

公开(公告)号：US08744602B2

公开(公告)日：2014-06-03

申请号：US13008171

申请日：2011-01-18

申请人： Gurjeet S. Saund ,  James B. Keller ,  Michael Frank

发明人： Gurjeet S. Saund ,  James B. Keller ,  Michael Frank

IPC分类号： G05B11/01 ,  H04W4/00

CPC分类号： H04L49/10

摘要： One or more fabric control circuits may be inserted in a communication fabric to control various aspects of the communications by components in the system. The fabric control circuits may be included on the interface of the components to the communication fabric, for example. Some systems that include a hierarchical communication fabric may also include fabric control circuits that may alternatively or additionally be included. The fabric control circuits may be programmable, and thus may provide the ability to tune the communication fabric to meet performance and/or functionality goals.

摘要翻译： 可以将一个或多个结构控制电路插入到通信结构中，以通过系统中的组件来控制通信的各个方面。 例如，结构控制电路可以包括在组件的接口到通信结构。 包括分级通信结构的一些系统还可以包括可以可选地或另外包括的结构控制电路。 织物控制电路可以是可编程的，因此可以提供调谐通信结构以满足性能和/或功能目标的能力。

公开(公告)号：US20130290681A1

公开(公告)日：2013-10-31

申请号：US13460178

申请日：2012-04-30

申请人： James B. Keller ,  John H. Mylius ,  Conrado Blasco-Allue ,  Gerard R. Williams, III ,  Sandeep Gupta

发明人： James B. Keller ,  John H. Mylius ,  Conrado Blasco-Allue ,  Gerard R. Williams, III ,  Sandeep Gupta

IPC分类号： G06F9/30

CPC分类号： G06F9/30141 ,  G06F1/3234 ,  G06F9/30112 ,  G06F9/384

摘要： A system and method for efficiently reducing the power consumption of register file accesses. A processor is operable to execute instructions with two or more data types, each with an associated size and alignment. Data operands for a first data type use operand sizes equal to an entire width of a physical register within a physical register file. Data operands for a second data type use operand sizes less than an entire width of a physical register. Accesses of the physical register file for operands associated with a non-full-width data type do not access a full width of the physical registers. A given numerical value may be bypassed for the portion of the physical register that is not accessed.

摘要翻译： 一种有效降低寄存器文件访问功耗的系统和方法。 处理器可操作以执行具有两个或多个数据类型的指令，每个数据类型具有相关联的大小和对齐。 第一种数据类型的数据操作数使用等于物理寄存器文件中物理寄存器的整个宽度的操作数大小。 第二种数据类型的数据操作数使用小于物理寄存器整个宽度的操作数大小。 访问与非全宽数据类型相关的操作数的物理寄存器文件不能访问物理寄存器的全部宽度。 对于未访问的物理寄存器的部分，可以忽略给定的数值。

公开(公告)号：US08566526B2

公开(公告)日：2013-10-22

申请号：US13545526

申请日：2012-07-10

申请人： James Wang ,  Zongjian Chen ,  James B. Keller ,  Timothy J. Millet

发明人： James Wang ,  Zongjian Chen ,  James B. Keller ,  Timothy J. Millet

IPC分类号： G06F13/00

CPC分类号： G06F3/0631 ,  G06F3/0604 ,  G06F3/0638 ,  G06F3/0673 ,  G06F12/0802 ,  G06F12/0831 ,  G06F12/0848 ,  G06F12/0853 ,  G06F12/0864 ,  G06F12/0877 ,  G06F12/125 ,  G06F2212/1021 ,  G06F2212/2515 ,  G06F2212/282 ,  G06F2212/601 ,  G06F2212/62 ,  Y02D10/13

摘要： In one embodiment, a memory that is delineated into transparent and non-transparent portions. The transparent portion may be controlled by a control unit coupled to the memory, along with a corresponding tag memory. The non-transparent portion may be software controlled by directly accessing the non-transparent portion via an input address. In an embodiment, the memory may include a decoder configured to decode the address and select a location in either the transparent or non-transparent portion. Each request may include a non-transparent attribute identifying the request as either transparent or non-transparent. In an embodiment, the size of the transparent portion may be programmable. Based on the non-transparent attribute indicating transparent, the decoder may selectively mask bits of the address based on the size to ensure that the decoder only selects a location in the transparent portion.

公开(公告)号：US20130275720A1

公开(公告)日：2013-10-17

申请号：US13447651

申请日：2012-04-16

申请人： James B. Keller ,  John H. Mylius ,  Conrado Blasco-Allue ,  Gerard R. Williams, III ,  Suparn Vats

发明人： James B. Keller ,  John H. Mylius ,  Conrado Blasco-Allue ,  Gerard R. Williams, III ,  Suparn Vats

IPC分类号： G06F9/30 ,  G06F9/312

CPC分类号： G06F9/30032 ,  G06F9/384

摘要： A system and method for reducing the latency of data move operations. A register rename unit within a processor determines whether a decoded move instruction is eligible for a zero cycle move operation. If so, control logic assigns a physical register identifier associated with a source operand of the move instruction to the destination operand of the move instruction. Additionally, the register rename unit marks the given move instruction to prevent it from proceeding in the processor pipeline. Further maintenance of the particular physical register identifier may be done by the register rename unit during commit of the given move instruction.

摘要翻译： 一种用于减少数据移动操作的延迟的系统和方法。 处理器内的寄存器重命名单元确定解码的移动指令是否符合零周期移动操作的资格。 如果是这样，则控制逻辑将与移动指令的源操作数相关联的物理寄存器标识分配给移动指令的目的地操作数。 此外，寄存器重命名单元标记给定的移动指令以防止其在处理器管线中继续进行。 特定物理寄存器标识符的进一步维护可以在给定移动指令的提交期间由寄存器重命名单元完成。

公开(公告)号：US20120185062A1

公开(公告)日：2012-07-19

申请号：US13008171

申请日：2011-01-18

申请人： Gurjeet S. Saund ,  James B. Keller ,  Michael Frank

发明人： Gurjeet S. Saund ,  James B. Keller ,  Michael Frank

IPC分类号： G05B15/00

CPC分类号： H04L49/10

摘要： In an embodiment, one or more fabric control circuits may be inserted in a communication fabric to control various aspects of the communications by components in the system. The fabric control circuits may be included on the interface of the components to the communication fabric, in some embodiments. In other embodiments that include a hierarchical communication fabric, fabric control circuits may alternatively or additionally be included. The fabric control circuits may be programmable, and thus may provide the ability to tune the communication fabric to meet performance and/or functionality goals.

摘要翻译： 在一个实施例中，可以将一个或多个结构控制电路插入到通信结构中，以通过系统中的组件来控制通信的各个方面。 在一些实施例中，结构控制电路可以包括在组件的接口上到通信结构。 在包括分层通信结构的其他实施例中，结构控制电路可以可选地或另外包括。 织物控制电路可以是可编程的，因此可以提供调谐通信结构以满足性能和/或功能目标的能力。

公开(公告)号：US07991928B2

公开(公告)日：2011-08-02

申请号：US12408410

申请日：2009-03-20

申请人： James B. Keller ,  Sridhar P. Subramanian ,  Ramesh Gunna

发明人： James B. Keller ,  Sridhar P. Subramanian ,  Ramesh Gunna

IPC分类号： G06F3/00 ,  G06F15/167

CPC分类号： G06F12/0831 ,  G06F13/362 ,  G06F13/4213 ,  Y02D10/13 ,  Y02D10/14 ,  Y02D10/151

摘要： An interface unit may comprise a buffer configured to store requests that are to be transmitted on an interconnect and a control unit coupled to the buffer. In one embodiment, the control unit is coupled to receive a retry response from the interconnect during a response phase of a first transaction for a first request stored in the buffer. The control unit is configured to record an identifier supplied on the interconnect with the retry response that identifies a second transaction that is in progress on the interconnect. The control unit is configured to inhibit reinitiation of the first transaction at least until detecting a second transmission of the identifier. In another embodiment, the control unit is configured to assert a retry response during a response phase of a first transaction responsive to a snoop hit of the first transaction on a first request stored in the buffer for which a second transaction is in progress on the interconnect. The control unit is further configured to provide an identifier of the second transaction with the retry response.

摘要翻译： 接口单元可以包括被配置为存储要在互连上发送的请求的缓冲器和耦合到缓冲器的控制单元。 在一个实施例中，控制单元被耦合以在对于存储在缓冲器中的第一请求的第一事务的响应阶段期间从互连接收重试响应。 控制单元被配置为记录在互连上提供的标识符，该重试响应标识互连上正在进行的第二事务。 控制单元被配置为至少在检测到标识符的第二次传输之前禁止第一事务的重新发起。 在另一个实施例中，控制单元被配置为在第一事务的响应阶段响应第一事务的窥探命中在存储在第二事务在互连上的第二事务的缓冲器中的第一请求时断言重试响应 。 控制单元还被配置为提供具有重试响应的第二事务的标识符。