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12. 发明申请

US20050066113A1 Method and memory controller for adaptive row management within a memory subsystem 失效
标题翻译：方法和内存控制器，用于存储器子系统内的自适应行管理
公开(公告)号：US20050066113A1
公开(公告)日：2005-03-24
申请号：US10666814
申请日：2003-09-18
申请人： Ramakrishnan Rajamony , Hazim Shafi , Robert Tremaine
发明人： Ramakrishnan Rajamony , Hazim Shafi , Robert Tremaine
IPC分类号： G06F12/00 , G06F13/16
CPC分类号： G06F13/1631 , G06F12/0215
摘要： A method and memory controller for adaptive row management within a memory subsystem provides metrics for evaluating row access behavior and dynamically adjusting the row management policy of the memory subsystem in conformity with measured metrics to reduce the average latency of the memory subsystem. Counters provided within the memory controller track the number of consecutive row accesses and optionally the number of total accesses over a measurement interval. The number of counted consecutive row accesses can be used to control the closing of rows for subsequent accesses, reducing memory latency. The count may be validated using a second counter or storage for improved accuracy and alternatively the row close count may be set via program or logic control in conformity with a count of consecutive row hits in ratio with a total access count. The control of row closure may be performed by a mode selection between always closing a row (non-page mode) or always holding a row open (page mode) or by intelligently closing rows after a count interval (row hold count) determined from the consecutive row access measurements. The logic and counters may be incorporated within the memory controller or within the memory devices and the controller/memory devices may provide I/O ports or memory locations for reading the count values and/or setting a row management mode or row hold count.
摘要翻译：用于存储器子系统内的自适应行管理的方法和存储器控制器提供用于评估行访问行为的度量，并且根据所测量的度量来动态调整存储器子系统的行管理策略，以减少存储器子系统的平均等待时间。存储器控制器内提供的计数器跟踪连续行访问的次数，以及可选的测量间隔内总访问次数。可以使用计数的连续行访问次数来控制后续访问的行关闭，从而减少内存延迟。可以使用第二计数器或存储器来对计数进行验证，以提高精确度，或者可以通过程序或逻辑控制来设置行关闭计数，这与根据总接入计数的比率的连续行命中的计数一致。行闭合的控制可以通过总是关闭行（非页面模式）或始终保持行打开（页面模式）之间的模式选择来执行，或者通过在从所述页面模式确定的计数间隔（行保持计数）之后智能地关闭行来执行连续行访问测量。逻辑和计数器可以并入存储器控制器内或存储器件内，并且控制器/存储器设备可以提供用于读取计数值的I / O端口或存储器位置和/或设置行管理模式或行保持计数。

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