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公开(公告)号：US20120079503A1
公开(公告)日：2012-03-29
申请号：US13151094
申请日：2011-06-01
申请人： William James DALLY , Stephen William Keckler , David Tarjan , John Erik Lindholm , Mark Alan Gebhart , Daniel Robert Johnson
发明人： William James DALLY , Stephen William Keckler , David Tarjan , John Erik Lindholm , Mark Alan Gebhart , Daniel Robert Johnson
IPC分类号： G06F9/48
CPC分类号： G06F9/4881 , G06F9/3851 , G06F9/3887
摘要： One embodiment of the present invention sets forth a technique for scheduling thread execution in a multi-threaded processing environment. A two-level scheduler maintains a small set of active threads called strands to hide function unit pipeline latency and local memory access latency. The strands are a sub-set of a larger set of pending threads that is also maintained by the two-leveler scheduler. Pending threads are promoted to strands and strands are demoted to pending threads based on latency characteristics. The two-level scheduler selects strands for execution based on strand state. The longer latency of the pending threads is hidden by selecting strands for execution. When the latency for a pending thread is expired, the pending thread may be promoted to a strand and begin (or resume) execution. When a strand encounters a latency event, the strand may be demoted to a pending thread while the latency is incurred.
摘要翻译： 本发明的一个实施例提出了一种用于在多线程处理环境中调度线程执行的技术。 一个两级调度程序维护一组称为线索的活动线程，以隐藏功能单元流水线延迟和本地存储器访问延迟。 这些链是一组更大的待处理线程的子集，其也由二级调度器维护。 等待线程被提升为线索，并且基于延迟特性将线降级到等待线程。 两级调度器基于线状态来选择用于执行的线。 通过选择要执行的链来隐藏待处理线程的延迟更长。 当待处理线程的等待时间到期时，挂起的线程可以被提升为一个线并开始（或恢复）执行。 当一条线遇到一个延迟事件时，该链可以被降级到等待线程，同时发生延迟。
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公开(公告)号：US20120079241A1
公开(公告)日：2012-03-29
申请号：US13242562
申请日：2011-09-23
CPC分类号： G06F9/4881 , G06F9/3851 , G06F9/3887
摘要： One embodiment of the present invention sets forth a technique for scheduling thread execution in a multi-threaded processing environment. A two-level scheduler maintains a small set of active threads called strands to hide function unit pipeline latency and local memory access latency. The strands are a sub-set of a larger set of pending threads that is also maintained by the two-leveler scheduler. Pending threads are promoted to strands and strands are demoted to pending threads based on latency characteristics, such as whether outstanding load operations have been executed. The longer latency of the pending threads is hidden by selecting strands for execution. When the latency for a pending thread is expired, the pending thread may be promoted to a strand and begin (or resume) execution. When a strand encounters a latency event, the strand may be demoted to a pending thread while the latency is incurred.
摘要翻译： 本发明的一个实施例提出了一种用于在多线程处理环境中调度线程执行的技术。 一个两级调度程序维护一组称为线索的活动线程，以隐藏功能单元流水线延迟和本地存储器访问延迟。 这些链是一组更大的待处理线程的子集，其也由二级调度器维护。 等待线程被提升到线束，并且基于等待时间特征（例如是否执行了未完成的加载操作）将线索降级到等待线程。 通过选择要执行的链来隐藏待处理线程的延迟更长。 当待处理线程的等待时间到期时，挂起的线程可以被提升为一个线并开始（或恢复）执行。 当一条线遇到一个延迟事件时，该链可以被降级到等待线程，同时发生延迟。
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公开(公告)号：US20140075403A1
公开(公告)日：2014-03-13
申请号：US13612629
申请日：2012-09-12
IPC分类号： G06F17/50
CPC分类号： G06F17/5031
摘要： One embodiment sets forth a technique for on-chip satisfying timing requirements of on-chip source-synchronous, CMOS-repeater-based interconnect. Each channel of the on-chip interconnect may include one or more redundant wires. Calibration logic is configured to apply transition patterns to wires comprising each channel and calibration patterns that are generated in response to the transition patterns are captured. Based on the calibration patterns, wires that best satisfy the timing requirements of the on-chip interconnect are selected for use to transmit data. The calibration logic also trims the delays of the clock and selected data wires based on captured calibration patterns to improve the timing margin of the on-chip interconnect. Improving the timing margin of the on-chip interconnect improves chip yields.
摘要翻译： 一个实施例提出了片上源同步，基于CMOS中继器的互连的片上满足定时要求的技术。 片上互连的每个通道可以包括一个或多个冗余电线。 校准逻辑被配置为将转换模式应用于包括每个通道的线和响应于捕获转换模式而生成的校准图案。 基于校准模式，选择最能满足片上互连的时序要求的导线用于传输数据。 校准逻辑还基于捕获的校准模式修整时钟和所选数据线的延迟，以提高片上互连的时序裕度。 提高片上互连的时序裕度提高了芯片产量。
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公开(公告)号：US20140070862A1
公开(公告)日：2014-03-13
申请号：US13612614
申请日：2012-09-12
CPC分类号： H03K5/131 , H01L2924/0002 , H03K5/133 , H01L2924/00
摘要： One embodiment sets forth a timing calibration technique for on-chip source-synchronous, complementary metal-oxide-semiconductor (CMOS) repeater-based interconnect. Two transition patterns may be applied to calibrate the delay of an on-chip data or clock wire. Calibration logic is configured to apply the transition patterns and then trim the delays of the clock and data wires based on captured calibration patterns. The trimming adjusts the delay of the clock and data wires using a configurable delay circuit. Timing errors may be caused by crosstalk, power-supply-induced jitter (PSIJ), or wire delay variation due to transistor and wire metallization mismatch. Chip yields may be improved by reducing the occurrence of timing errors due to mismatched delays between different wires of an on-chip interconnect.
摘要翻译： 一个实施例提出了用于片上源同步，互补金属氧化物半导体（CMOS）基于中继器的互连的定时校准技术。 可以应用两个转换模式来校准片上数据或时钟线的延迟。 校准逻辑被配置为应用转换模式，然后基于捕获的校准模式修剪时钟和数据线的延迟。 微调使用可配置的延迟电路来调整时钟和数据线的延迟。 定时误差可能由串扰，电源引起的抖动（PSIJ）或由于晶体管和导线金属化不匹配引起的导线延迟变化引起。 可以通过减少由于片上互连的不同导线之间的不匹配延迟引起的定时误差的出现来提高芯片产量。
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公开(公告)号：US20130021078A1
公开(公告)日：2013-01-24
申请号：US13188364
申请日：2011-07-21
申请人： Ilyas ELKIN , William James DALLY , Jonah M. ALBEN
发明人： Ilyas ELKIN , William James DALLY , Jonah M. ALBEN
IPC分类号： H03K3/01
CPC分类号： H03K3/356 , H03K3/356026 , H03K3/356052 , H03K3/356147 , H03K3/356191
摘要： One embodiment of the present invention sets forth a technique for capturing and holding a level of an input signal using a latch circuit that presents a low number of loads to the clock signal. The clock is only coupled to a bridging transistor and a pair of clock-activated pull-down or pull-up transistors. The level of the input signal is propagated to the output signal when the storage sub-circuit is not enabled. The storage sub-circuit is enabled by the bridging transistor and a propagation sub-circuit is activated and deactivated by the pair of clock-activated transistors.
摘要翻译： 本发明的一个实施例提出了一种使用向时钟信号呈现低负载的锁存电路来捕获和保持输入信号电平的技术。 时钟仅耦合到桥接晶体管和一对时钟激活的下拉或上拉晶体管。 当存储子电路未使能时，输入信号的电平被传播到输出信号。 存储子电路由桥接晶体管使能，传播子电路由一对时钟激活晶体管激活和去激活。
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公开(公告)号：US20130120047A1
公开(公告)日：2013-05-16
申请号：US13294025
申请日：2011-11-10
申请人： William James DALLY
发明人： William James DALLY
IPC分类号： H03H11/26
CPC分类号： H03H11/265
摘要： One embodiment of the present invention sets forth a technique for reducing jitter caused by changes in a power supply for a clock generated by a ring oscillator of inverter devices. An inverter sub-circuit is coupled in parallel with a current-starved inverter sub-circuit to produce an inverter circuit that is insensitive to changes in the power supply voltage. When the ring oscillator is used as the voltage controlled oscillator of a phase locked loop, the delay of the inverters may be controlled by varying a bias current for each inverter in response to changes in the power supply voltage to reduce any jitter in a clock output produced by the changes in the power supply voltage. When the transistor devices are sized appropriately and the bias current is adjusted, the sensitivity of the inverter circuit to changes in the power supply voltage may be reduced.
摘要翻译： 本发明的一个实施例提出了一种用于减少由逆变器装置的环形振荡器产生的时钟的电源的变化引起的抖动的技术。 逆变器子电路与电流欠压逆变器子电路并联耦合，以产生对电源电压变化不敏感的逆变器电路。 当环形振荡器用作锁相环的压控振荡器时，可以通过响应于电源电压的变化改变每个逆变器的偏置电流来控制反相器的延迟，以减少时钟输出中的任何抖动 由电源电压的变化产生。 当晶体管器件的尺寸适当并且调节偏置电流时，可以减小逆变器电路对电源电压变化的灵敏度。
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公开(公告)号：US20120079200A1
公开(公告)日：2012-03-29
申请号：US13240366
申请日：2011-09-22
申请人： William James DALLY
发明人： William James DALLY
CPC分类号： G06F12/06 , G06F13/16 , G06F13/1605 , G06F2213/0038
摘要： One embodiment of the present invention sets forth a technique for providing a unified memory for access by execution threads in a processing system. Several logically separate memories are combined into a single unified memory that includes a single set of shared memory banks, an allocation of space in each bank across the logical memories, a mapping rule that maps the address space of each logical memory to its partition of the shared physical memory, a circuitry including switches and multiplexers that supports the mapping, and an arbitration scheme that allocates access to the banks.
摘要翻译： 本发明的一个实施例提出了一种用于在处理系统中提供用于由执行线程访问的统一存储器的技术。 几个逻辑上分离的存储器被组合成单个统一存储器，其包括单个共享存储器组集合，跨越逻辑存储器的每个存储体中的空间分配;将每个逻辑存储器的地址空间映射到其分区的映射规则 共享物理存储器，包括支持映射的交换机和多路复用器的电路以及分配对存储体的访问的仲裁方案。
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