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1. 发明授权

US08131976B2 Tracking effective addresses in an out-of-order processor 有权
标题翻译：跟踪无序处理器中的有效地址
公开(公告)号：US08131976B2
公开(公告)日：2012-03-06
申请号：US12422595
申请日：2009-04-13
申请人： Richard W. Doing , Susan E. Eisen , David S. Levitan , Kevin N. Magill , Brian R. Mestan , Balaram Sinharoy , Benjamin W. Stolt , Jeffrey R. Summers , Albert J. Van Norstrand, Jr.
发明人： Richard W. Doing , Susan E. Eisen , David S. Levitan , Kevin N. Magill , Brian R. Mestan , Balaram Sinharoy , Benjamin W. Stolt , Jeffrey R. Summers , Albert J. Van Norstrand, Jr.
IPC分类号： G06F9/30 , G06F9/40 , G06F7/38 , G06F9/00 , G06F9/44 , G06F9/26 , G06F9/34
CPC分类号： G06F9/3802 , G06F9/322 , G06F9/3806 , G06F9/3853 , G06F9/3855 , G06F9/3861
摘要： Mechanisms, in a data processing system, are provided for tracking effective addresses through a processor pipeline of the data processing system. The mechanisms comprise logic for fetching an instruction from an instruction cache and associating, by an effective address table logic in the data processing system, an entry in an effective address table (EAT) data structure with the fetched instruction. The mechanisms further comprise logic for associating an effective address tag (eatag) with the fetched instruction, the eatag comprising a base eatag that points to the entry in the EAT and an eatag offset. Moreover, the mechanisms comprise logic for processing the instruction through the processor pipeline by processing the eatag.
摘要翻译：在数据处理系统中提供用于通过数据处理系统的处理器流水线跟踪有效地址的机制。这些机制包括用于从指令高速缓存取出指令的逻辑，并通过数据处理系统中的有效地址表逻辑将有效地址表（EAT）数据结构中的条目与获取的指令相关联。所述机制还包括用于将有效地址标签（eatag）与所述获取的指令相关联的逻辑，所述标签包括指向所述EAT中的条目的基本食品，以及食品标签偏移量。此外，这些机制包括通过处理eatag来处理通过处理器管线的指令的逻辑。

2. 发明申请

US20100262806A1 Tracking Effective Addresses in an Out-of-Order Processor 有权
标题翻译：跟踪无序处理器中的有效地址
公开(公告)号：US20100262806A1
公开(公告)日：2010-10-14
申请号：US12422595
申请日：2009-04-13
申请人： Richard W. Doing , Susan E. Eisen , David S. Levitan , Kevin N. Magill , Brian R. Mestan , Balaram Sinharoy , Benjamin W. Stolt , Jeffrey R. Summers , Albert J. Van Norstrand, JR.
发明人： Richard W. Doing , Susan E. Eisen , David S. Levitan , Kevin N. Magill , Brian R. Mestan , Balaram Sinharoy , Benjamin W. Stolt , Jeffrey R. Summers , Albert J. Van Norstrand, JR.
IPC分类号： G06F9/30
CPC分类号： G06F9/3802 , G06F9/322 , G06F9/3806 , G06F9/3853 , G06F9/3855 , G06F9/3861
摘要： Mechanisms, in a data processing system, are provided for tracking effective addresses through a processor pipeline of the data processing system. The mechanisms comprise logic for fetching an instruction from an instruction cache and associating, by an effective address table logic in the data processing system, an entry in an effective address table (EAT) data structure with the fetched instruction. The mechanisms further comprise logic for associating an effective address tag (eatag) with the fetched instruction, the eatag comprising a base eatag that points to the entry in the EAT and an eatag offset. Moreover, the mechanisms comprise logic for processing the instruction through the processor pipeline by processing the eatag.
摘要翻译：在数据处理系统中提供用于通过数据处理系统的处理器流水线跟踪有效地址的机制。这些机制包括用于从指令高速缓存取出指令的逻辑，并通过数据处理系统中的有效地址表逻辑将有效地址表（EAT）数据结构中的条目与获取的指令相关联。所述机制还包括用于将有效地址标签（eatag）与所述获取的指令相关联的逻辑，所述标签包括指向所述EAT中的条目的基本食品，以及食品标签偏移量。此外，这些机制包括通过处理eatag来处理通过处理器管线的指令的逻辑。

3. 发明申请

US20080263325A1 SYSTEM AND STRUCTURE FOR SYNCHRONIZED THREAD PRIORITY SELECTION IN A DEEPLY PIPELINED MULTITHREADED MICROPROCESSOR 审中-公开
标题翻译：深层管道多路径微处理器中同步螺纹优先选择的系统和结构
公开(公告)号：US20080263325A1
公开(公告)日：2008-10-23
申请号：US11737491
申请日：2007-04-19
申请人： Prabhakar Kudva , David S. Levitan , Balaram Sinharoy , John D. Wellman
发明人： Prabhakar Kudva , David S. Levitan , Balaram Sinharoy , John D. Wellman
IPC分类号： G06F9/30
CPC分类号： G06F9/3851
摘要： A microprocessor and system with improved performance and power in simultaneous multithreading (SMT) microprocessor architecture. The microprocessor and system includes a process wherein the processor has the ability to select instructions from one thread or another in any given processor clock cycle. Instructions from each, thread may be assigned selection priorities at multiple decision points in a processor in a given cycle dynamically. The thread priority is based on monitoring performance behavior and activities in the processor. In the exemplary embodiment, the present invention discloses a microprocessor and system for synchronizing thread priorities among multiple decision points throughout the micro-architecture of the microprocessor. This system and method for synchronizing thread priorities allows each thread priority to he in sync and aware of the status of other thread priorities at various decision points within the microprocessor.
摘要翻译：具有同步多线程（SMT）微处理器架构的具有改进的性能和功耗的微处理器和系统。微处理器和系统包括处理器，其中处理器能够在任何给定的处理器时钟周期中从一个线程或另一个线程中选择指令。来自每个线程的指令可以在给定周期中的处理器中的多个决策点动态地分配选择优先级。线程优先级基于监视处理器中的性能行为和活动。在示例性实施例中，本发明公开了一种微处理器和系统，用于在整个微处理器的微架构中的多个决策点之间同步线程优先级。这种用于同步线程优先级的系统和方法允许每个线程优先级同步并且在微处理器内的各个决定点处知道其他线程优先级的状态。

4. 发明申请

US20120005462A1 Hardware Assist for Optimizing Code During Processing 审中-公开
标题翻译：处理过程中优化代码的硬件辅助
公开(公告)号：US20120005462A1
公开(公告)日：2012-01-05
申请号：US12828697
申请日：2010-07-01
申请人： Ronald P. Hall , Brian R. Konigsburg , David S. Levitan , Brian R. Mestan
发明人： Ronald P. Hall , Brian R. Konigsburg , David S. Levitan , Brian R. Mestan
IPC分类号： G06F9/38
CPC分类号： G06F11/3466 , G06F9/3808 , G06F9/3844 , G06F11/348 , G06F2201/88
摘要： A method, data processing system, and computer program product for obtaining information about instructions. Instructions are processed. In response to processing a branch instruction in the instructions, a determination is made as to whether a result from processing the branch instruction follows a prediction of whether a branch is predicted to occur for the branch instruction. In response to the result following the prediction, the branch instruction is added to a current segment in a trace. In response to an absence of the result following the prediction, the branch instruction is added to the current segment in the trace and a first new segment and a second new segment are created. The first new segment includes a first branch instruction reached in the instructions from following the prediction. The second new segment includes a second branch instruction in the instructions reached from not following the prediction.
摘要翻译：一种用于获取关于指令的信息的方法，数据处理系统和计算机程序产品。处理说明。响应于在指令中处理分支指令，确定来自处理分支指令的结果是否遵循预测分支指令是否为分支指令发生的预测。响应于预测结果，分支指令被添加到跟踪中的当前段。响应于预测之后没有结果，分支指令被添加到跟踪中的当前段，并且创建第一新段和第二新段。第一个新的段包括在跟随预测的指令中达到的第一个分支指令。第二个新的段包括从不遵循预测到达的指令中的第二个分支指令。

5. 发明申请

US20130055033A1 HARDWARE-ASSISTED PROGRAM TRACE COLLECTION WITH SELECTABLE CALL-SIGNATURE CAPTURE 审中-公开
标题翻译：硬件辅助程序跟踪采集与可选择的呼叫签名捕获
公开(公告)号：US20130055033A1
公开(公告)日：2013-02-28
申请号：US13300863
申请日：2011-11-21
申请人： Giles R. Frazier , David S. Levitan , Brian R. Mestan , Mauricio J. Serrano
发明人： Giles R. Frazier , David S. Levitan , Brian R. Mestan , Mauricio J. Serrano
IPC分类号： G06F11/34
CPC分类号： G06F11/3466 , G06F11/348 , G06F11/3636 , G06F2201/83 , G06F2201/865
摘要： Hardware-assisted program tracing is facilitated by a processor that includes a root instruction address register, a program trace signature computation unit and a call signature register. When a program instruction having an address matching the root instruction address register is executed, a program trace signature is captured in the call signature register and capture of branch history is commenced. By accumulating different values of the call signature register, for example in response to an interrupt generated when the root instruction is executed, software that performs program tracing can obtain signatures of all of the multiple execution paths that lead to the root instruction, which is also specified by software in order to set different root instructions for program tracing. In an alternative implementation, a storage for multiple call signatures is provided in the processor and read at once by the software.
摘要翻译：硬件辅助程序跟踪由包括根指令地址寄存器，程序跟踪签名计算单元和呼叫签名寄存器的处理器来促进。当执行具有与根指令地址寄存器匹配的地址的程序指令时，在呼叫签名寄存器中捕获程序跟踪签名，并且开始分支历史记录的捕获。通过累积呼叫签名寄存器的不同值，例如响应于执行根指令时产生的中断，执行程序跟踪的软件可以获得导致根指令的所有多个执行路径的签名，这也是由软件指定，以便为程序跟踪设置不同的根指令。在替代实现中，在处理器中提供用于多个呼叫签名的存储器，并由软件一次读取。

6. 发明授权

US07032097B2 Zero cycle penalty in selecting instructions in prefetch buffer in the event of a miss in the instruction cache 失效
标题翻译：在指令高速缓存中发生错误的情况下，在预取缓冲区中选择指令时的零周期损失
公开(公告)号：US07032097B2
公开(公告)日：2006-04-18
申请号：US10422808
申请日：2003-04-24
申请人： Gregory W. Alexander , David S. Levitan , Balaram Sinharoy , William J. Starke
发明人： Gregory W. Alexander , David S. Levitan , Balaram Sinharoy , William J. Starke
IPC分类号： G06F12/00
CPC分类号： G06F9/3802 , G06F9/3814
摘要： A method and processor for selecting instructions in a prefetch buffer in the event of a miss in an instruction cache with a zero cycle penalty. A first, second and third hash may be performed on an address retrieved from a program counter. The first hashed address may be used to index into the instruction cache. The second hashed address may be used to index into the prefetch buffer. If the value stored in the indexed entry in an effective address array of the instruction cache does not equal the value of the third hash of the address (an instruction cache miss), then the instructions in the indexed entry in the prefetch buffer are selected. In this manner, instructions may be selected in the prefetch buffer in the event of a miss in the instruction cache with a zero cycle penalty.
摘要翻译：一种方法和处理器，用于在具有零循环损失的指令高速缓存中的未命中的情况下，在预取缓冲器中选择指令。可以对从程序计数器检索的地址执行第一，第二和第三散列。第一个散列地址可以用于索引到指令高速缓存。第二个散列地址可以用于索引到预取缓冲区。如果存储在指令高速缓存的有效地址阵列中的索引条目中的值不等于地址（指令高速缓存未命中）的第三散列值，则选择预取缓冲器中索引条目中的指令。以这种方式，可以在具有零周期损失的指令高速缓存中的未命中的情况下在预取缓冲器中选择指令。

7. 发明授权

US07469407B2 Method for resource balancing using dispatch flush in a simultaneous multithread processor 有权
标题翻译：在同时多线程处理器中使用调度刷新的资源平衡方法
公开(公告)号：US07469407B2
公开(公告)日：2008-12-23
申请号：US10422685
申请日：2003-04-24
申请人： William E. Burky , Richard J. Eickemeyer , Ronald N. Kalla , David S. Levitan , Balaram Sinharoy , John W. Ward, III
发明人： William E. Burky , Richard J. Eickemeyer , Ronald N. Kalla , David S. Levitan , Balaram Sinharoy , John W. Ward, III
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28 , G06F9/46 , G06F9/30 , G06F9/40 , G06F15/00
CPC分类号： G06F9/3867 , G06F9/3851
摘要： The processing of instructions from multiple threads using a shared dispatch pipeline is controlled by invoking a dispatch flush operation wherein instructions of a selected thread in the shared dispatch pipeline are flushed in response to resource requirements. A first thread in an SMT may be using more processing than corresponds to its priority because its instructions are dominating use of a shared resource. In this case, to rebalance instruction dispatch between the first thread and the second thread, a dispatch flush of instructions of the first thread is issued. Normally the flushed instructions of a thread are refetched and reenter the dispatch pipeline. If the first thread is dominating use of shared resources, hold may be issued following the dispatch flush holding instructions of the first thread until a balanced utilization is realized.
摘要翻译：使用共享调度流水线处理来自多个线程的指令通过调用分派刷新操作来控制，其中响应于资源需求刷新共享发行流水线中所选线程的指令。 SMT中的第一个线程可能使用比其优先级更多的处理，因为它的指令主要使用共享资源。在这种情况下，为了重新平衡第一个线程和第二个线程之间的指令分派，发出第一个线程的指令的调度刷新。通常，刷新螺纹的指示并重新进入调度管道。如果第一个线程主要使用共享资源，则可以在第一线程的调度刷新保持指令之后发出保持，直到实现平衡利用。

8. 发明申请

US20120254837A1 TASK SWITCH IMMUNIZED PERFORMANCE MONITORING 有权
标题翻译：任务切换免疫性能监控
公开(公告)号：US20120254837A1
公开(公告)日：2012-10-04
申请号：US13079189
申请日：2011-04-04
申请人： GILES R. FRAZIER , David S. Levitan , Brian R. Mestan
发明人： GILES R. FRAZIER , David S. Levitan , Brian R. Mestan
IPC分类号： G06F9/44
CPC分类号： G06F11/348 , G06F2201/865
摘要： A performance monitoring technique provides task-switch immune operation without requiring storage and retrieval of the performance monitor state when a task switch occurs. When a hypervisor signals that a task is being resumed, it provides an indication, which starts a delay timer. The delay timer is resettable in case a predetermined time period has not elapsed when the next task switch occurs. After the delay timer expires, analysis of the performance monitor measurements is resumed, which prevents an initial state or a state remaining from a previous task from corrupting the performance monitoring results. The performance monitor may be or include an execution trace unit that collects taken branches in a current trace and may use branch prediction success to determine whether to collect a predicted and taken branch instruction in a current trace or to start a new segment when the branch resolves in a non-predicted direction.
摘要翻译：性能监控技术提供任务切换免疫操作，而不需要在发生任务切换时存储和检索性能监视器状态。当管理程序发出任务正在恢复的信号时，它提供指示，启动一个延迟定时器。在发生下一任务切换的情况下，在没有经过预定时间段的情况下，可以将延迟定时器复位。在延迟定时器到期后，恢复对性能监视器测量的分析，这阻止了先前任务的初始状态或状态损坏性能监视结果。性能监视器可以是或包括执行跟踪单元，其在当前跟踪中收集所采取的分支，并且可以使用分支预测成功来确定是否在当前跟踪中收集预测和采取的分支指令，或者当分支解析时启动新分段处于非预测方向。

9. 发明授权

US09069563B2 Reducing store-hit-loads in an out-of-order processor 有权
标题翻译：减少无序处理器中的存储命中负载
公开(公告)号：US09069563B2
公开(公告)日：2015-06-30
申请号：US13235174
申请日：2011-09-16
申请人： Brian R. Konigsburg , David S. Levitan , Brian R. Mestan , David Mui
发明人： Brian R. Konigsburg , David S. Levitan , Brian R. Mestan , David Mui
IPC分类号： G06F9/312 , G06F9/38
CPC分类号： G06F9/3834 , G06F9/3838
摘要： A technique for reducing store-hit-loads in an out-of-order processor includes storing a store address of a store instruction associated with a store-hit-load (SHL) pipeline flush in an SHL entry. In response to detecting another SHL pipeline flush for the store address, a current count associated with the SHL entry is updated. In response to the current count associated with the SHL entry reaching a first terminal count, a dependency for the store instruction is created such that execution of a younger load instruction with a load address that overlaps the store address stalls until the store instruction executes.
摘要翻译：用于减少无序处理器中的存储命中负载的技术包括存储与存储命中加载（SHL）管线冲洗相关联的存储指令的存储地址在SHL条目中。响应于检测存储地址的另一个SHL管道flush，更新与SHL条目相关联的当前计数。响应于与SHL条目相关联的当前计数到达第一终端计数，创建存储指令的依赖关系，使得具有与存储地址重叠的加载地址的较年轻加载指令的执行停止，直到存储指令执行。

10. 发明申请

US20130073833A1 REDUCING STORE-HIT-LOADS IN AN OUT-OF-ORDER PROCESSOR 有权
标题翻译：减少订单处理器中的存储负载
公开(公告)号：US20130073833A1
公开(公告)日：2013-03-21
申请号：US13235174
申请日：2011-09-16
申请人： Brian R. Konigsburg , David S. Levitan , Brian R. Mestan , David Mui
发明人： Brian R. Konigsburg , David S. Levitan , Brian R. Mestan , David Mui
IPC分类号： G06F9/38 , G06F9/312
CPC分类号： G06F9/3834 , G06F9/3838
摘要： A technique for reducing store-hit-loads in an out-of-order processor includes storing a store address of a store instruction associated with a store-hit-load (SHL) pipeline flush in an SHL entry. In response to detecting another SHL pipeline flush for the store address, a current count associated with the SHL entry is updated. In response to the current count associated with the SHL entry reaching a first terminal count, a dependency for the store instruction is created such that execution of a younger load instruction with a load address that overlaps the store address stalls until the store instruction executes.
摘要翻译：用于减少无序处理器中的存储命中负载的技术包括存储与存储命中加载（SHL）管线冲洗相关联的存储指令的存储地址在SHL条目中。响应于检测存储地址的另一个SHL管道flush，更新与SHL条目相关联的当前计数。响应于与SHL条目相关联的当前计数到达第一终端计数，创建存储指令的依赖关系，使得具有与存储地址重叠的加载地址的较年轻加载指令的执行停止，直到存储指令执行。

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