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21. 发明授权

US07484072B2 Page replacement policy for systems having multiple page sizes 失效
标题翻译：具有多个页面大小的系统的页面替换策略
公开(公告)号：US07484072B2
公开(公告)日：2009-01-27
申请号：US12026334
申请日：2008-02-05
申请人： David Alan Hepkin , Thomas Stanley Mathews
发明人： David Alan Hepkin , Thomas Stanley Mathews
IPC分类号： G06F12/00
CPC分类号： G06F12/128 , G06F12/1027 , G06F2212/652
摘要： In a data processing system utilizing multiple page sizes for virtual memory paging, a system, method, and article of manufacture for managing page replacement. In one embodiment, the page replacement method begins with a page frame allocation request, such as may be generated following a page fault. A page replacement procedure is invoked to select one or more pages to be replaced by the requested page(s). In a preferred embodiment, the page replacement includes a step of selecting, in accordance with a page type allocation of at least one of the multiple page sizes, a page size to be utilized for page replacement for the page frame allocation request.
摘要翻译：在用于虚拟存储器寻呼的多个页面大小的数据处理系统中，用于管理页面更换的系统，方法和制品。在一个实施例中，页面替换方法以页面分配请求开始，诸如可以在页面错误之后生成。调用页面替换过程来选择要由所请求的页面替换的一个或多个页面。在优选实施例中，页面替换包括根据多页面大小中的至少一个的页面类型分配来选择要用于页面帧分配请求的页面替换的页面大小的步骤。

22. 发明申请

US20080263313A1 Pretranslating Input/Output Buffers In Environments With Multiple Page Sizes 失效
标题翻译：在多页大小的环境中预翻译输入/输出缓冲区
公开(公告)号：US20080263313A1
公开(公告)日：2008-10-23
申请号：US12169826
申请日：2008-07-09
申请人： David Alan Hepkin
发明人： David Alan Hepkin
IPC分类号： G06F12/10
CPC分类号： G06F12/1081 , G06F2212/652
摘要： Pretranslating input/output buffers in environments with multiple page sizes that include determining a pretranslation page size for an input/output buffer under an operating system that supports more than one memory page size, identifying pretranslation page frame numbers for the buffer in dependence upon the pretranslation page size, pretranslating the pretranslation page frame numbers to physical page numbers, and storing the physical page numbers in association with the pretranslation page size. Typical embodiments also include accessing the buffer, including translating a virtual memory address in the buffer to a physical memory address in dependence upon the physical page numbers and the pretranslation page size and accessing the physical memory of the buffer at the physical memory address.
摘要翻译：在具有多个页面大小的环境中预处理输入/输出缓冲区，包括在支持多个内存页面大小的操作系统下确定输入/输出缓冲区的预翻译页面大小，根据预翻译识别缓冲区的预翻译页面帧数页面大小，将翻译前页面帧编号预翻译为物理页码，并将物理页面编号与预翻译页面大小相关联。典型实施例还包括访问缓冲器，包括根据物理页码和预翻译页面大小以及在物理存储器地址处访问缓冲器的物理存储器，将缓冲器中的虚拟存储器地址转换为物理存储器地址。

23. 发明授权

US07437529B2 Method and mechanism for efficiently creating large virtual memory pages in a multiple page size environment 失效
标题翻译：在多页大小的环境中有效地创建大型虚拟内存页的方法和机制
公开(公告)号：US07437529B2
公开(公告)日：2008-10-14
申请号：US11154159
申请日：2005-06-16
申请人： Ramanjaneya Sarma Burugula , David Alan Hepkin , Joefon Jann , Thomas Stanley Mathews
发明人： Ramanjaneya Sarma Burugula , David Alan Hepkin , Joefon Jann , Thomas Stanley Mathews
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28 , G06F9/26 , G06F9/34
CPC分类号： G06F12/1081 , G06F2212/652
摘要： A method and system for efficiently migrating in-use small pages to enable promotion of contiguous small pages into large pages in a memory environment that includes small pages pinned to real memory and/or and small pages mapped to direct memory access (DMA) within real memory. The operating system is designed with a two-phase page promotion engine/utility that enables coalescing contiguous small virtual memory pages to create large virtual memory pages by migrating in-use small memory pages including those that are pinned and/or mapped to DMA.
摘要翻译：一种用于有效地迁移使用中小页面的方法和系统，以便能够在包含固定到实际存储器的小页面和/或映射到真实的直接存储器访问（DMA）的小页面的存储器环境中将连续的小页面推广到大页面中）记忆。操作系统设计有两阶段页面推广引擎/实用程序，可通过迁移使用中的小型内存页面（包括固定和/或映射到DMA）的小型内存页面，使连续的小型虚拟内存页面合并，从而创建大型虚拟内存页面。

24. 发明申请

US20080126737A1 Page Replacement Policy for Systems Having Multiple Page Sizes 失效
公开(公告)号：US20080126737A1
公开(公告)日：2008-05-29
申请号：US12026334
申请日：2008-02-05
申请人： David Alan Hepkin , Thomas Stanley Mathews
发明人： David Alan Hepkin , Thomas Stanley Mathews
IPC分类号： G06F12/00
CPC分类号： G06F12/128 , G06F12/1027 , G06F2212/652
摘要： In a data processing system utilizing multiple page sizes for virtual memory paging, a system, method, and article of manufacture for managing page replacement. In one embodiment, the page replacement method begins with a page frame allocation request, such as may be generated following a page fault. A page replacement procedure is invoked to select one or more pages to be replaced by the requested page(s). In a preferred embodiment, the page replacement includes a step of selecting, in accordance with a page type allocation of at least one of the multiple page sizes, a page size to be utilized for page replacement for the page frame allocation request.

25. 发明授权

US07318142B2 System and method for dynamically adjusting read ahead values based upon memory usage 失效
标题翻译：基于内存使用动态调整预读值的系统和方法
公开(公告)号：US07318142B2
公开(公告)日：2008-01-08
申请号：US11463100
申请日：2006-08-08
申请人： Jos Manuel Accapadi , Andrew Dunshea , Li Li , Grover Herbert Neuman , Mysore Sathyanarayana Srinivas , David Alan Hepkin
发明人： Jos Manuel Accapadi , Andrew Dunshea , Li Li , Grover Herbert Neuman , Mysore Sathyanarayana Srinivas , David Alan Hepkin
IPC分类号： G06F12/06
CPC分类号： G06F12/023
摘要： A system and method for dynamically altering a Virtual Memory Manager (VMM) Sequential-Access Read Ahead settings based upon current system memory conditions is provided. Normal VMM operations are performed using the Sequential-Access Read Ahead values set by the user. When low memory is detected, the system either turns off Sequential-Access Read Ahead operations or decreases the maximum page ahead (maxpgahead) value based upon whether the amount of free space is simply low or has reached a critically low level. The altered VMM Sequential-Access Read Ahead state remains in effect until enough free space is available so that normal VMM Sequential-Access Read Ahead operations can be performed (at which point the altered Sequential-Access Read Ahead values are reset to their original levels).
摘要翻译：提供了一种基于当前系统内存条件动态更改虚拟内存管理器（VMM）顺序访问预读设置的系统和方法。使用用户设置的顺序访问读取前值可以执行正常的VMM操作。当检测到低内存时，系统会根据自由空间量是否很低或已经达到极低的水平，关闭顺序访问预读操作或者减小最大页面前提（maxpgahead）值。改变的VMM顺序访问预读状态在有足够的可用空间可用之前保持有效，以便可以执行正常的VMM顺序访问预读操作（此时，改变的顺序访问读取前置值被重置为其原始级别）。

26. 发明授权

US08799892B2 Selective memory donation in virtual real memory environment 有权
标题翻译：虚拟内存环境中的选择性内存捐赠
公开(公告)号：US08799892B2
公开(公告)日：2014-08-05
申请号：US12135316
申请日：2008-06-09
申请人： David Alan Hepkin
发明人： David Alan Hepkin
IPC分类号： G06F9/455 , G06F9/46
CPC分类号： G06F9/45558 , G06F12/0866 , G06F2009/45583
摘要： A method, system, and computer usable program product for selective memory donation in a virtual real memory environment are provided in the illustrative embodiments. A virtual machine receives a request for memory donation. A component of the virtual machine determines whether a portion of a memory space being used for file caching exceeds a threshold. The determining forms a threshold determination, and the portion of the memory space being used for file caching forms a file cache. If the threshold determination is false, the component ignores the request. If the threshold determination is true, a component of the virtual machine releases a part of the file cache that exceeds the threshold. The part of the file cache forms a released file cache. In response to the request, the virtual machine makes the released file cache available to a requester of the request.
摘要翻译：在说明性实施例中提供了用于虚拟实际存储器环境中的选择性存储器捐赠的方法，系统和计算机可用程序产品。虚拟机接收到对内存捐赠的请求。虚拟机的组件确定用于文件高速缓存的内存空间的一部分是否超过阈值。该确定形成阈值确定，并且用于文件高速缓存的存储器空间的部分形成文件高速缓存。如果阈值确定为假，组件将忽略该请求。如果阈值确定为真，则虚拟机的组件释放超过阈值的文件高速缓存的一部分。文件缓存的一部分形成已发布的文件缓存。响应于该请求，虚拟机使释放的文件缓存可用于请求的请求者。

27. 发明授权

US08458431B2 Expanding memory size 失效
公开(公告)号：US08458431B2
公开(公告)日：2013-06-04
申请号：US12611190
申请日：2009-11-03
申请人： David Alan Hepkin , Satya Prakash Sharma , Saurabh Nath Sharma , Randal Craig Swanberg
发明人： David Alan Hepkin , Satya Prakash Sharma , Saurabh Nath Sharma , Randal Craig Swanberg
IPC分类号： G06F12/00
CPC分类号： G06F13/16
摘要： A system, and computer usable program product for expanding memory size are provided in the illustrative embodiments. A desired size of an expanded memory and a first information about a workload in the data processing system are received. A size of a compressed memory pool to use with the memory to make the desired size of the expanded memory available is computed. A representation of the memory is configured, the representation of the memory appearing to be of a size larger than the size of the memory, the representation of the memory being the expanded memory, and the size of the representation being the size of the expanded memory. The expanded memory is made available such that the memory in the data processing system is usable by addressing the expanded memory.

28. 发明授权

US08364928B2 Modeling memory compression 失效
标题翻译：建模内存压缩
公开(公告)号：US08364928B2
公开(公告)日：2013-01-29
申请号：US13454323
申请日：2012-04-24
申请人： Saravanan Devendra , David Alan Hepkin , Rajalakshmi SrinivasaRaghavan
发明人： Saravanan Devendra , David Alan Hepkin , Rajalakshmi SrinivasaRaghavan
IPC分类号： G06F12/02
CPC分类号： H03M7/3068 , G06F12/08 , G06F12/1009 , G06F2212/401
摘要： A method for modeling memory compression is provided in the illustrative embodiments. A subset of candidate pages is received. The subset of candidate pages is a subset of a set of candidate pages used in executing a workload in a data processing system. A candidate page is compressible uncompressed data in a memory associated with the data processing system. The subset of candidate pages is compressed in a scratch space. A compressibility of the workload is computed based on the compression of the subset of candidate pages. Page reference information of the subset of candidate pages is received. A memory reference rate of the workload is determined. A recommendation is presented about a memory compression model for the workload in the data processing system.
摘要翻译：在说明性实施例中提供了用于建模存储器压缩的方法。接收候选页面的子集。候选页面的子集是用于在数据处理系统中执行工作负载的一组候选页面的子集。候选页面是与数据处理系统相关联的存储器中的可压缩的未压缩数据。候选页面的子集在临时空间中被压缩。基于候选页面子集的压缩来计算工作负载的可压缩性。收到候选页子集的页面参考信息。确定工作负载的内存参考速率。介绍了关于数据处理系统中工作负载的内存压缩模型的建议。

29. 发明申请

US20110238943A1 MODELING MEMORY COMPRESSION 失效
标题翻译：建模记忆压缩
公开(公告)号：US20110238943A1
公开(公告)日：2011-09-29
申请号：US12748921
申请日：2010-03-29
申请人： SARAVANAN DEVENDRAN , David Alan Hepkin , Rajalakshmi SrinivasaRaghavan
发明人： SARAVANAN DEVENDRAN , David Alan Hepkin , Rajalakshmi SrinivasaRaghavan
IPC分类号： G06F12/00 , G06F12/02
CPC分类号： H03M7/3068 , G06F12/08 , G06F12/1009 , G06F2212/401
摘要： A method, system, and computer usable program product for modeling memory compression are provided in the illustrative embodiments. A subset of candidate pages is received. The subset of candidate pages is a subset of a set of candidate pages used in executing a workload in a data processing system. A candidate page is compressible uncompressed data in a memory associated with the data processing system. The subset of candidate pages is compressed in a scratch space. A compressibility of the workload is computed based on the compression of the subset of candidate pages. Page reference information of the subset of candidate pages is received. A memory reference rate of the workload is determined. A recommendation is presented about a memory compression model for the workload in the data processing system.
摘要翻译：在说明性实施例中提供了用于建模存储器压缩的方法，系统和计算机可用程序产品。接收候选页面的子集。候选页面的子集是用于在数据处理系统中执行工作负载的一组候选页面的子集。候选页面是与数据处理系统相关联的存储器中的可压缩的未压缩数据。候选页面的子集在临时空间中被压缩。基于候选页面子集的压缩来计算工作负载的可压缩性。收到候选页子集的页面参考信息。确定工作负载的内存参考速率。介绍了关于数据处理系统中工作负载的内存压缩模型的建议。

30. 发明申请

US20110107054A1 EXPANDING MEMORY SIZE 失效
标题翻译：扩大内存大小
公开(公告)号：US20110107054A1
公开(公告)日：2011-05-05
申请号：US12611190
申请日：2009-11-03
申请人： David Alan Hepkin , Satya Prakash Sharma , Saurabh Nath Sharma , Randal Craig Swanberg
发明人： David Alan Hepkin , Satya Prakash Sharma , Saurabh Nath Sharma , Randal Craig Swanberg
IPC分类号： G06F12/00
CPC分类号： G06F13/16
摘要： A method, system, and computer usable program product for expanding memory size are provided in the illustrative embodiments. A desired size of an expanded memory and a first information about a workload in the data processing system are received. A size of a compressed memory pool to use with the memory to make the desired size of the expanded memory available is computed. A representation of the memory is configured, the representation of the memory appearing to be of a size larger than the size of the memory, the representation of the memory being the expanded memory, and the size of the representation being the size of the expanded memory. The expanded memory is made available such that the memory in the data processing system is usable by addressing the expanded memory.
摘要翻译：在说明性实施例中提供了用于扩展存储器大小的方法，系统和计算机可用程序产品。接收扩展存储器的期望大小和关于数据处理系统中的工作负载的第一信息。计算与存储器一起使用的压缩存储器池的大小，以使扩展存储器的期望大小可用。配置存储器的表示，存储器的表示看起来大于存储器的大小，存储器的表示是扩展存储器，并且表示的大小是扩展存储器的大小。扩展的存储器可用，使得数据处理系统中的存储器可通过寻址扩展的存储器来使用。

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