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    • 46. 发明授权
    • Exchanging operation parameters between a data storage device and a controller
    • 在数据存储设备和控制器之间交换操作参数
    • US06851018B2
    • 2005-02-01
    • US10107560
    • 2002-03-27
    • Stewart R. WyattRobin Alexis TakasugiKenneth K. Smith
    • Stewart R. WyattRobin Alexis TakasugiKenneth K. Smith
    • G11C7/10G06F12/00
    • G11C7/1045
    • In a data storage and retrieval system, a method and system for exchanging operation parameters between a data storage device and a storage device controller is disclosed. A memory device within the data storage device comprises operation parameter registers, which store operation parameters that are indicative of environmental conditions and characteristics of the memory device itself. The operation parameter registers may be readable and writable. To initiate an exchange of operation parameters, the storage device controller sends a command code indicative of an operation parameter exchange command and designates an address in the operation parameter registers to which operation parameters are to be written or from which operation parameters are to be read.
    • 在数据存储和检索系统中,公开了一种用于在数据存储设备和存储设备控制器之间交换操作参数的方法和系统。 数据存储设备内的存储器件包括操作参数寄存器,其存储指示存储器件本身的环境条件和特性的操作参数。 操作参数寄存器可以是可读写的。 为了启动操作参数的交换,存储装置控制器发送指示操作参数交换命令的命令代码,并指定操作参数寄存器中要写入操作参数的地址,或从哪个操作参数读取操作参数。
    • 49. 发明授权
    • Distributed memory multiprocessor computer system with directory based
cache coherency with ambiguous mapping of cached data to main-memory
locations
    • 分布式内存多处理器计算机系统,具有基于目录的缓存一致性,缓存数据与主内存位置的模糊映射
    • US6055610A
    • 2000-04-25
    • US918209
    • 1997-08-25
    • Kenneth K. SmithLoren P. StaleySorin Iacobovici
    • Kenneth K. SmithLoren P. StaleySorin Iacobovici
    • G06F12/08G06F15/16G06F12/00
    • G06F12/0824G06F12/082G06F2212/507
    • A distributed-memory multiprocessor system uses fast and main coherency directories to implement cache coherency. The main directory is stored with user data in main memory and includes sufficient information to determine which memory cells have cached copies of user data stored in main memory. In addition, the main directories specify the states of the cached data. The fast directories cache only some of the main-directory information for only a fraction of the main-memory locations at any given time. The fast directories are tagless in one mode and use partial tags in another mode. The fast-directory information is accessed concurrently with main-directory information in response to data requests. Directory information is retrieved first from the fast directory and is used to launch predictive recalls. Subsequently received main-directory information is used to validate or invalidate the predictive recalls. If invalidated, determined recalls are issued, and memory access times are the same as they would have been without the fast directory. If validated, the predictive recalls reduce data access times. To the extent that the predictive recalls are successful, overall system performance is improved.
    • 分布式存储器多处理器系统使用快速和主要的一致性目录来实现高速缓存一致性。 主目录与主存储器中的用户数据一起存储,并且包括足够的信息以确定哪些存储器单元具有存储在主存储器中的用户数据的缓存副本。 此外,主目录指定缓存数据的状态。 在任何给定时间,快速目录仅缓存主存储器位置的一部分主目录信息。 快速目录在一种模式下是无标签的,在其他模式下使用部分标签。 响应于数据请求,快速目录信息与主目录信息同时访问。 目录信息首先从快速目录中检索,并用于启动预测性调用。 随后收到的主目录信息用于验证或使预测召回无效。 如果无效,则发出确定的召回,并且内存访问时间与没有快速目录的内存访问时间相同。 如果验证,预测性召回可以减少数据访问时间。 在预测召回成功的情况下,整体系统性能得到改善。