公开(公告)号：US09032181B2

公开(公告)日：2015-05-12

申请号：US12783205

申请日：2010-05-19

申请人： Irfan Ahmad ,  Carl A. Waldspurger

发明人： Irfan Ahmad ,  Carl A. Waldspurger

IPC分类号： G06F12/10

CPC分类号： G06F12/1018 ,  G06F12/1036 ,  G06F12/109 ,  G06F2212/152 ,  G06F2212/656

摘要： Read requests to a commonly accessed storage volume are conditionally issued, depending on whether or not a requested data block is already stored in memory from a prior access or to be stored in memory upon completion of a pending request. A data structure is maintained in memory to track physical memory pages and to indicate for each physical memory page the corresponding location in the storage volume from which the contents of the physical memory were read and the number of virtual memory pages that are mapped thereto.

摘要翻译： 根据所请求的数据块是否已经从先前的访问中存储在存储器中，或者在完成未决请求时被存储在存储器中，有条件地发出对常用访问存储卷的读取请求。 在存储器中维护数据结构以跟踪物理存储器页面，并且为每个物理存储器页面指示从其读取物理存储器的内容的存储卷中的对应位置和映射到其的虚拟存储器页面的数量。

公开(公告)号：US08990531B2

公开(公告)日：2015-03-24

申请号：US13179032

申请日：2011-07-08

申请人： Irfan Ahmad

发明人： Irfan Ahmad

IPC分类号： G06F12/00 ,  G06F9/455 ,  G06F12/10

CPC分类号： G06F9/45558 ,  G06F12/1009 ,  G06F2009/45583

摘要： Activity level of memory pages is classified in virtual machine environment, so that processes such as live VM migration and checkpointing, among others, can be carried out more efficiently. Because each such hypervisor-based service may desire classification of activity levels of memory pages at different frequencies and different time granularities, the hypervisor supports methods to classify activity levels of memory pages for a plurality of time intervals.

摘要翻译： 内存页面的活动级别分为虚拟机环境，可以更有效地执行诸如虚拟机迁移和检查点之类的进程。 因为每个这样的基于管理程序的服务可能希望对不同频率和不同时间粒度的存储器页面的活动级别进行分类，所以管理程序支持对多个时间间隔的存储器页面的活动级别进行分类的方法。

公开(公告)号：US08560577B1

公开(公告)日：2013-10-15

申请号：US12834188

申请日：2010-07-12

申请人： Irfan Ahmad ,  Ajay Gulati

发明人： Irfan Ahmad ,  Ajay Gulati

IPC分类号： G06F7/00 ,  G06F17/30

CPC分类号： G06F17/302

摘要： Two shared data structures are maintained in a storage unit for coordinating statistic collection among multiple hosts that share the storage unit. The first data structure stores information about the number of hosts that possess slots within the second data structure and identifying information about the slots. The second data structure maintains statistics of each of the multiple hosts. By using this first data structure, hosts can be added to and deleted from the second data structure in an organized manner.

摘要翻译： 两个共享数据结构保存在存储单元中，用于协调共享存储单元的多个主机之间的统计收集。 第一数据结构存储关于在第二数据结构内具有时隙的主机数量的信息，并且识别关于时隙的信息。 第二个数据结构维护每个多个主机的统计信息。 通过使用该第一数据结构，可以以有组织的方式将主机添加到第二数据结构中并从其删除。

公开(公告)号：US20120248868A1

公开(公告)日：2012-10-04

申请号：US13438217

申请日：2012-04-03

申请人： Fahim Usshihab Mobin ,  Irfan Ahmad Mobin ,  Ian Michael Hughes ,  Dil Afroz Mobin

发明人： Fahim Usshihab Mobin ,  Irfan Ahmad Mobin ,  Ian Michael Hughes ,  Dil Afroz Mobin

IPC分类号： B60L1/00 ,  B66C25/00

CPC分类号： B60L3/0046 ,  B60L3/04 ,  B60L7/18 ,  B60L8/003 ,  B60L50/30 ,  B60L53/11 ,  B60L53/30 ,  B60L53/63 ,  B60L53/65 ,  B60L53/80 ,  B60L58/19 ,  B60L2240/545 ,  B60L2240/622 ,  B60L2240/72 ,  B60L2240/80 ,  B60L2250/16 ,  Y02E60/721 ,  Y02T10/7005 ,  Y02T10/705 ,  Y02T10/7072 ,  Y02T10/7083 ,  Y02T10/7291 ,  Y02T90/121 ,  Y02T90/124 ,  Y02T90/128 ,  Y02T90/14 ,  Y02T90/16 ,  Y02T90/162 ,  Y02T90/163 ,  Y02T90/169 ,  Y04S10/126 ,  Y04S30/14

摘要： In described embodiments, a battery car employed in conjunction with a battery car station employs a swappable battery configuration. Batteries are of differing types depending on provision of high current or high voltage, with each having a energy sensor. Access to the batteries of differing types is controlled through a switch control processor selectively coupling batteries to one or more power grids depending upon a given battery's sensed energy. Access to the batteries of differing types is based on demands of vehicle operation. Based on such configuration, a swappable battery car station in communication with the battery car might then selectively replace batteries as needed.

摘要翻译： 在所描述的实施例中，与电池车站一起使用的电池车采用可交换电池配置。 根据提供高电流或高电压，电池具有不同的类型，每个电池具有能量传感器。 通过开关控制处理器控制对不同类型的电池的访问，所述开关控制处理器根据给定的电池的感测能量选择性地将电池耦合到一个或多个电网。 访问不同类型的电池是基于车辆操作的要求。 基于这样的配置，与电池车通信的可插拔电池车站可以根据需要选择性地更换电池。

公开(公告)号：US20120036325A1

公开(公告)日：2012-02-09

申请号：US13182306

申请日：2011-07-13

申请人： Ali MASHTIZADEH ,  Irfan AHMAD

发明人： Ali MASHTIZADEH ,  Irfan AHMAD

IPC分类号： G06F12/08

CPC分类号： G06F9/45558 ,  G06F12/0802 ,  G06F2009/45583 ,  G06F2212/312 ,  G06F2212/401

摘要： Techniques are disclosed for managing memory within a virtualized system that includes a memory compression cache. Generally, the virtualized system may include a hypervisor configured to use a compression cache to temporarily store memory pages that have been compressed to conserve memory space. A “first-in touch-out” (FITO) list may be used to manage the size of the compression cache by monitoring the compressed memory pages in the compression cache. Each element in the FITO list corresponds to a compressed page in the compression cache. Each element in the FITO list records a time at which the corresponding compressed page was stored in the compression cache (i.e. an age). A size of the compression cache may be adjusted based on the ages of the pages in the compression cache.

摘要翻译： 公开了用于在包括存储器压缩缓存的虚拟化系统内管理存储器的技术。 通常，虚拟化系统可以包括配置成使用压缩高速缓存临时存储被压缩以节省存储器空间的存储器页面的管理程序。 通过监视压缩缓存中的压缩存储器页，可以使用“先进先出”（FITO）列表来管理压缩高速缓存的大小。 FITO列表中的每个元素都对应于压缩缓存中的压缩页面。 FITO列表中的每个元素记录相应的压缩页面存储在压缩缓存（即一个年龄）中的时间。 可以基于压缩高速缓存中的页面的年龄来调整压缩高速缓存的大小。

公开(公告)号：US20120011504A1

公开(公告)日：2012-01-12

申请号：US12834662

申请日：2010-07-12

申请人： Irfan AHMAD ,  Carl A. WALDSPURGER ,  Alexander Thomas GARTHWAITE ,  Kiran TATI ,  Pin LU

发明人： Irfan AHMAD ,  Carl A. WALDSPURGER ,  Alexander Thomas GARTHWAITE ,  Kiran TATI ,  Pin LU

IPC分类号： G06F9/455 ,  G06F12/10

CPC分类号： G06F12/08 ,  G06F12/10

摘要： Activity level of memory pages is classified in virtual machine environment, so that processes such as live VM migration and checkpointing, among others, can be carried out more efficiently. The method includes the steps of scanning page table entries of hypervisor-managed page tables continuously over repeating scan periods to determine whether memory pages have been accessed or not, and for each memory page, determining an activity level of the memory page based on whether the memory page has been accessed or not since a prior scan and storing the activity level of the memory page. The activity level of the memory page may be represented by one or more bits of its page table entry and may be classified as having at least two states ranging from hot to cold.

摘要翻译： 内存页面的活动级别分为虚拟机环境，可以更有效地执行诸如虚拟机迁移和检查点之类的进程。 该方法包括以下步骤：在重复的扫描周期上连续地扫描虚拟机管理程序管理的页表的页表条目，以确定是否已存取存储器页;以及对于每个存储器页，基于是否存储页，确定存储器页的活动级别 存储器页面已被访问或不被访问，因为先前扫描并存储存储器页面的活动级别。 存储器页面的活动级别可以由其页表项的一个或多个位表示，并且可以被分类为具有从热到冷的至少两个状态。

公开(公告)号：US20110072208A1

公开(公告)日：2011-03-24

申请号：US12566435

申请日：2009-09-24

申请人： Ajay GULATI ,  Irfan AHMAD ,  Chethan KUMAR

发明人： Ajay GULATI ,  Irfan AHMAD ,  Chethan KUMAR

IPC分类号： G06F12/00 ,  G06F12/16

CPC分类号： G06F11/3485 ,  G06F3/0613 ,  G06F3/0647 ,  G06F3/067 ,  G06F11/3433 ,  G06F11/3447 ,  G06F2201/815 ,  G06F2206/1012

摘要： Distributed storage resources are managed based on data collected from online monitoring of workloads on the storage resources and performance characteristics of the storage resources. Load metrics are calculated from the collected data and used to identify workloads that are migration candidates and storage units that are migration destinations, so that load balancing across the distributed storage resources can be achieved.

摘要翻译： 分布式存储资源根据从存储资源的工作负载和存储资源的性能特征的在线监控收集的数据进行管理。 负载指标由收集的数据计算，用于识别作为迁移目的地的迁移候选和存储单元的工作负载，从而可以实现跨分布式存储资源的负载平衡。

公开(公告)号：US20100106820A1

公开(公告)日：2010-04-29

申请号：US12260054

申请日：2008-10-28

申请人： Ajay GULATI ,  Irfan AHMAD ,  Carl A. WALDSPURGER

发明人： Ajay GULATI ,  Irfan AHMAD ,  Carl A. WALDSPURGER

IPC分类号： G06F15/173

CPC分类号： G06F9/52

摘要： A method and system for providing quality of service to a plurality of hosts accessing a common resource is described. According to one embodiment, a plurality of IO requests is received from clients executing as software entities on one of the hosts. An IO request queue for each client is separately managed, and an issue queue is populated based on contents of the IO request queues. When a host issue queue is not full, a new IO request is entered into the host issue queue and is issued to the common resource. A current average latency observed at the host is calculated, and an adjusted window size is calculated at least in part based on the current average latency. The window size of the issue queue is adjusted according to the calculated window size.

摘要翻译： 描述了一种用于向接入公共资源的多个主机提供服务质量的方法和系统。 根据一个实施例，从作为主机之一上的软件实体执行的客户端接收到多个IO请求。 每个客户端的IO请求队列被单独管理，并且基于IO请求队列的内容填充问题队列。 当主机发出队列未满时，将向主机发出队列中输入新的IO请求，并发布给公共资源。 计算在主机处观察到的当前平均延迟，并且基于当前平均延迟至少部分地计算调整的窗口大小。 根据计算的窗口大小调整问题队列的窗口大小。

公开(公告)号：US09032398B2

公开(公告)日：2015-05-12

申请号：US12834662

申请日：2010-07-12

申请人： Irfan Ahmad ,  Carl A. Waldspurger ,  Alexander Thomas Garthwaite ,  Kiran Tati ,  Pin Lu

发明人： Irfan Ahmad ,  Carl A. Waldspurger ,  Alexander Thomas Garthwaite ,  Kiran Tati ,  Pin Lu

IPC分类号： G06F21/00 ,  G06F12/00 ,  G06F12/08 ,  G06F12/10

CPC分类号： G06F12/08 ,  G06F12/10

摘要： Activity level of memory pages is classified in virtual machine environment, so that processes such as live VM migration and checkpointing, among others, can be carried out more efficiently. The method includes the steps of scanning page table entries of hypervisor-managed page tables continuously over repeating scan periods to determine whether memory pages have been accessed or not, and for each memory page, determining an activity level of the memory page based on whether the memory page has been accessed or not since a prior scan and storing the activity level of the memory page. The activity level of the memory page may be represented by one or more bits of its page table entry and may be classified as having at least two states ranging from hot to cold.

摘要翻译： 内存页面的活动级别分为虚拟机环境，可以更有效地执行诸如虚拟机迁移和检查点之类的进程。 该方法包括以下步骤：在重复的扫描周期上连续地扫描虚拟机管理程序管理的页表的页表条目，以确定是否已存取存储器页;以及对于每个存储器页，基于是否存储页，确定存储器页的活动级别 存储器页面已被访问或不被访问，因为先前扫描并存储存储器页面的活动级别。 存储器页面的活动级别可以由其页表项的一个或多个位表示，并且可以被分类为具有从热到冷的至少两个状态。

公开(公告)号：US08478924B2

公开(公告)日：2013-07-02

申请号：US12766369

申请日：2010-04-23

申请人： Irfan Ahmad ,  Maxime Austruy ,  Mallik Mahalingam

发明人： Irfan Ahmad ,  Maxime Austruy ,  Mallik Mahalingam

IPC分类号： G06F13/24

CPC分类号： G06F13/24 ,  G06F3/0659 ,  G06F9/45558 ,  G06F9/4812 ,  G06F2009/45579 ,  G06F2213/2406 ,  G06F2213/2408 ,  H04L47/10

摘要： In a computer system, a method of controlling coalescence of interrupts includes dynamically basing a current level of interrupt coalescing upon a determination of outstanding input/output (I/O) commands for which corresponding I/O completions have not been received. Deliveries of interrupts are executed on the basis of the current level and in an absence of enabling timing-triggered delivery of an interrupt.

摘要翻译： 在计算机系统中，一种控制中断聚合的方法包括在确定尚未接收到相应的I / O完成的未完成的输入/输出（I / O）命令时动态地基于中断合并的当前级别。 中断的传递是在当前级别的基础上执行的，并且没有启用定时触发的中断传递。