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    • 2. 发明授权
    • Structure for data bus bandwidth scheduling in an FBDIMM memory system operating in variable latency mode
    • 在可变延迟模式下工作的FBDIMM存储器系统中数据总线带宽调度的结构
    • US08028257B2
    • 2011-09-27
    • US12110765
    • 2008-04-28
    • James J. Allen, Jr.Steven K. JenkinsMichael R. Trombley
    • James J. Allen, Jr.Steven K. JenkinsMichael R. Trombley
    • G06F17/50G06F12/06G06F13/00
    • G06F13/1689
    • A design structure embodied in a machine readable storage medium for designing, manufacturing, and/or testing a design for scheduling the servicing of data requests, using the variable latency mode, in an FBDIMM memory sub-system is provided. A scheduling algorithm pre-computes return time data for data connected to DRAM buffer chips and stores the return time data in a table. The return time data is expressed as data return time binary vectors with one bit equal to “1” in each vector. For each received data request, the memory controller retrieves the appropriate return time vector. Additionally, the scheduling algorithm utilizes an updated history vector to determine whether the received request presents a conflict to the executing requests. By computing and utilizing a score for each request, the scheduling algorithm re-orders and schedules the execution of selected requests to preserve as much data bus bandwidth as possible, while avoiding conflict.
    • 提供了一种体现在机器可读存储介质中的设计结构,用于在FBDIMM存储器子系统中使用可变延迟模式来设计,制造和/或测试用于调度数据请求的服务的设计。 调度算法预先计算连接到DRAM缓冲器芯片的数据的返回时间数据,并将返回时间数据存储在表中。 返回时间数据表示为在每个向量中一位等于“1”的数据返回时间二进制向量。 对于每个接收到的数据请求,存储器控制器检索适当的返回时间向量。 此外,调度算法利用更新的历史向量来确定接收到的请求是否对执行请求产生冲突。 通过计算和利用每个请求的分数,调度算法重新排序和调度所选择的请求的执行,以尽可能地保留尽可能多的数据总线带宽,同时避免冲突。
    • 8. 发明授权
    • Data bus bandwidth scheduling in an FBDIMM memory system operating in variable latency mode
    • 在可变延迟模式下工作的FBDIMM存储系统中的数据总线带宽调度
    • US07660952B2
    • 2010-02-09
    • US11680695
    • 2007-03-01
    • James J. Allen, Jr.Steven K. JenkinsMichael R. Trombley
    • James J. Allen, Jr.Steven K. JenkinsMichael R. Trombley
    • G06F12/06
    • G06F13/4243
    • A method and system for scheduling the servicing of data requests, using the variable latency mode, in an FBDIMM memory sub-system. A scheduling algorithm pre-computes return time data for data connected to all DRAM buffer chips and stores the return time data in a table. The return time data is expressed as a set of data return time binary vectors with one bit equal to “1” in each vector. For each received data request, the memory controller retrieves the appropriate return time vector. Additionally, the scheduling algorithm utilizes an updated history vector representing a compilation of data return time vectors of all executing requests to determine whether the received request presents a conflict to the executing requests. By computing and utilizing a score for each request, the scheduling algorithm re-orders and schedules the execution of selected requests to preserve as much data bus bandwidth as possible, while avoiding conflict.
    • 一种用于在FBDIMM存储器子系统中使用可变等待时间模式来调度数据请求的服务的方法和系统。 调度算法预先计算连接到所有DRAM缓冲器芯片的数据的返回时间数据,并将返回时间数据存储在表中。 返回时间数据表示为在每个向量中一位等于“1”的一组数据返回时间二进制向量。 对于每个接收到的数据请求,存储器控制器检索适当的返回时间向量。 此外,调度算法利用表示所有执行请求的数据返回时间向量的汇编的更新历史向量,以确定接收到的请求是否对执行请求产生冲突。 通过计算和利用每个请求的分数,调度算法重新排序和调度所选择的请求的执行,以尽可能地保留尽可能多的数据总线带宽,同时避免冲突。