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    • 159. 发明授权
    • Error detection and correction method in a computer system and main memory controller of the same
    • 计算机系统和主存储器控制器中的错误检测和校正方法
    • US06779148B2
    • 2004-08-17
    • US09805169
    • 2001-03-14
    • Tsuyoshi Tanaka
    • Tsuyoshi Tanaka
    • G06F1100
    • G06F11/10H03M13/15
    • According to an error detection and correction method to be implemented in a computer system, when an error is detected in data to be written in a memory, fault information is appended to the data without an increase in the number of bits constituting the data, and the resultant data is stored in the memory. An error control code represented by a SEC-DEC code is adopted for encoding and decoding. Data is encoded into a shortened code. At this time, specific bit positions associated with column vectors deleted from a parity check matrix defined in the error control code are allocated to fault information. Thus, a word to be actually stored in the memory is composed of check bits produced from data to be written and fault information, and information bits constituting the data to be written. Decoding is performed on the assumption that the fault information represents 0s. When data having fault information appended thereto is decoded, the fault information is reproduced through error detection and correction.
    • 根据要在计算机系统中实现的错误检测和校正方法,当在要写入存储器的数据中检测到错误时,将错误信息附加到数据,而不增加构成数据的位数,并且 结果数据被存储在存储器中。 采用由SEC-DEC代码表示的错误控制码用于编码和解码。 数据被编码成缩短的代码。 此时,将从错误控制代码中定义的奇偶校验矩阵中删除的列向量相关联的特定位位置分配给故障信息。 因此,实际存储在存储器中的字由由要写入的数据和故障信息产生的校验位和构成要写入的数据的信息位组成。 假设故障信息表示0s,进行解码。 当附加有故障信息的数据被解码时,通过错误检测和校正再现故障信息。
    • 160. 发明授权
    • Multiprocessor system
    • 多处理器系统
    • US06263405B1
    • 2001-07-17
    • US09134336
    • 1998-08-14
    • Naohiko IrieNaoki HamanakaTsuyoshi TanakaMasabumi ShibataAtsushi Nakajima
    • Naohiko IrieNaoki HamanakaTsuyoshi TanakaMasabumi ShibataAtsushi Nakajima
    • G06F1212
    • G06F12/0815G06F12/0813
    • A cache status report sum up for use in a multiprocessor system having a plurality of processor units each having a processor and a cache memory and a plurality of memory units. The cache status report sum up apparatus sums up cache coherency check results indicating statuses of the cache memories without limiting the number of memory access requests requiring cache coherency checks that can be overlapped when the memory access requests requiring cache coherency checks are executed in an overlapping manner. The cache status report sum up apparatus is provided between the processor units and the memory units and sums up cache coherency check results sent by cache status reporting apparatus included in each processor unit. The cache status reporting apparatus responds to a memory access request requiring a cache coherency check. The cache status report sum up apparatus, after summing up the cache coherency check results, sends the summary of the cache coherency check results to the processor unit which requested the memory access request requiring a cache coherency check.
    • 高速缓存状态报告总结为在具有多个处理器单元的多处理器系统中使用,每个处理器单元各自具有处理器和高速缓冲存储器以及多个存储器单元。 高速缓存状态报告总结装置总结高速缓存一致性检查结果,指示高速缓存存储器的状态,而不限制需要高速缓存一致性检查的存储器访问请求的数量,当需要高速缓存一致性检查的存储器访问请求以重叠的方式执行时可重叠 。 在处理器单元和存储器单元之间提供高速缓存状态报告总结装置,并且对由每个处理器单元中包括的高速缓存状态报告装置发送的高速缓存一致性检查结果求和。 高速缓存状态报告装置响应需要高速缓存一致性检查的存储器访问请求。 高速缓存状态报告总结装置在总结高速缓存一致性检查结果之后,将高速缓存一致性检查结果的摘要发送到请求需要高速缓存一致性检查的存储器访问请求的处理器单元。