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1. 发明申请

US20110088030A1 Efficient Virtualization of Input/Output Completions for a Virtual Device 有权
标题翻译：虚拟设备的输入/输出完成的高效虚拟化
公开(公告)号：US20110088030A1
公开(公告)日：2011-04-14
申请号：US12968039
申请日：2010-12-14
申请人： Ole AGESEN , Boris WEISSMAN , Keith ADAMS , Jennifer-Ann M. ANDERSON , Maxime AUSTRUY
发明人： Ole AGESEN , Boris WEISSMAN , Keith ADAMS , Jennifer-Ann M. ANDERSON , Maxime AUSTRUY
IPC分类号： G06F9/455
CPC分类号： G06F9/45508 , G06F9/45558 , G06F9/4825 , G06F2009/45579
摘要： Completion interrupts corresponding to I/O requests issued by a virtual machine guest, which runs on a host platform, are virtualized in such a way that I/O completion interrupts to the requesting guest are delivered no faster than it can stably handle them, but, when possible, faster than the nominal speed of a virtual device to which a virtual machine addresses the I/O request. In general, completion events received from the host platform in response to guest I/O requests are examined with respect to time. If enough time has passed that the virtual device would normally have completed the I/O request, then the completion interrupt is delivered to the guest. If the nominal time has not elapsed, however, the invention enqueues and time-stamps the event and delivers it at the earliest of a) the normal maturity time, or b) at a safepoint.
摘要翻译：在主机平台上运行的虚拟机访客发出的I / O请求相应的完成中断被虚拟化，使得对请求的客户端的I / O完成中断的传送速度不会比可以稳定地处理它们的速度更快，而是在可能的情况下，虚拟机对于I / O请求所对应的虚拟设备的标称速度更快。一般来说，根据客户端I / O请求从主机平台接收到的完成事件将相对于时间进行检查。如果虚拟设备通常已经完成了I / O请求的足够的时间，则完成中断将传递给客户端。然而，如果没有经过标称时间，本发明会在a）正常到期时间的最早时间排队和时间戳，并且b）在一个安全点。

2. 发明申请

US20090254709A1 Prediction Mechanism for Subroutine Returns in Binary Translation Sub-Systems of Computers 审中-公开
标题翻译：计算机二进制翻译子系统中子程序返回的预测机制
公开(公告)号：US20090254709A1
公开(公告)日：2009-10-08
申请号：US12485679
申请日：2009-06-16
申请人： Ole AGESEN
发明人： Ole AGESEN
IPC分类号： G06F9/54 , G06F12/08
CPC分类号： G06F8/52
摘要： A sequence of input language (IL) instructions of a guest system is converted, for example by binary translation, into a corresponding sequence of output language (OL) instructions of a host system, which executes the OL instructions. In order to determine the return address after any IL call to a subroutine at a target entry address P, the corresponding OL return address is stored in an array at a location determined by an index calculated as a function of P. After completion of execution of the OL translation of the IL subroutine, execution is transferred to the address stored in the array at the location where the OL return address was previously stored. A confirm instruction block is included in each OL call site to determine whether the transfer was to the correct or incorrect call site, and a back-up routine is included to handle the cases of incorrect call sites.
摘要翻译：访客系统的输入语言（IL）指令的序列例如通过二进制转换被转换成执行OL指令的主机系统的输出语言（OL）指令的相应序列。为了在目标入口地址P处的子程序的任何IL调用之后确定返回地址，相应的OL返回地址被存储在由作为P的函数计算的索引确定的位置的阵列中。在完成执行 IL子程序的OL转换，执行被传送到在先前存储OL返回地址的位置存储在数组中的地址。每个OL呼叫站点中都包含确认指令块，以确定传输是否为正确或不正确的呼叫站点，还包括备份程序来处理不正确的呼叫站点的情况。

3. 发明申请

US20120054411A1 SYSTEM AND METHOD FOR MAINTAINING MEMORY PAGE SHARING IN A VIRTUAL ENVIRONMENT 有权
标题翻译：维护虚拟环境中的内存页面共享的系统和方法
公开(公告)号：US20120054411A1
公开(公告)日：2012-03-01
申请号：US13214028
申请日：2011-08-19
申请人： Ole AGESEN
发明人： Ole AGESEN
IPC分类号： G06F12/08
CPC分类号： G06F12/08 , G06F9/45537 , G06F9/544 , G06F2209/542
摘要： In a virtualized system using memory page sharing, a method is provided for maintaining sharing when Guest code attempts to write to the shared memory. In one embodiment, virtualization logic uses a pattern matcher to recognize and intercept page zeroing code in the Guest OS. When the page zeroing code is about to run against a page that is already zeroed, i.e., contains all zeros, and is being shared, the memory writes in the page zeroing code have no effect. The virtualization logic skips over the writes, providing an appearance that the Guest OS page zeroing code has run to completion but without performing any of the writes that would have caused a loss of page sharing. The pattern matcher can be part of a binary translator that inspects code before it executes.
摘要翻译：在使用内存页面共享的虚拟化系统中，提供了一种方法，用于在访客代码尝试写入共享内存时保持共享。在一个实施例中，虚拟化逻辑使用模式匹配器来识别和拦截访客操作系统中的页面归零代码。当页面归零代码即将针对已经归零的页面运行时，即包含全部零，并且正在共享时，页面调零代码中的内存写入不起作用。虚拟化逻辑跳过写入，提供Guest OS页面调零代码已经运行到完成的外观，但不执行会导致页面共享丢失的任何写入。模式匹配器可以是在执行代码之前检查代码的二进制转换器的一部分。

4. 发明申请

US20120030407A1 SYSTEM AND METHOD FOR IMPROVING MEMORY LOCALITY OF VIRTUAL MACHINES 有权
标题翻译：用于改善虚拟机的存储器本地化的系统和方法
公开(公告)号：US20120030407A1
公开(公告)日：2012-02-02
申请号：US13271024
申请日：2011-10-11
申请人： Vivek PANDEY , Ole AGESEN , Alex GARTHWAITE , Carl WALDSPURGER , Rajesh VENKATASUBRAMANIAN
发明人： Vivek PANDEY , Ole AGESEN , Alex GARTHWAITE , Carl WALDSPURGER , Rajesh VENKATASUBRAMANIAN
IPC分类号： G06F12/10
CPC分类号： G06F9/5033 , G06F9/45558 , G06F9/4856 , G06F2009/4557
摘要： A system and related method of operation for migrating the memory of a virtual machine from one NUMA node to another. Once the VM is migrated to a new node, migration of memory pages is performed while giving priority to the most utilized pages, so that access to these pages becomes local as soon as possible. Various heuristics are described to enable different implementations for different situations or scenarios.
摘要翻译：将虚拟机的存储器从一个NUMA节点迁移到另一个NUMA节点的系统和相关操作方法。一旦将VM迁移到新节点，就会在优先使用最多的页面的同时执行内存页面的迁移，以便尽快访问这些页面。描述了各种启发式方法，以实现不同情况或场景的不同实现。

5. 发明申请

US20120265963A1 LARGE-PAGE OPTIMIZATION IN VIRTUAL MEMORY PAGING SYSTEMS 审中-公开
标题翻译：虚拟内存寻呼系统中的大型优化
公开(公告)号：US20120265963A1
公开(公告)日：2012-10-18
申请号：US13529473
申请日：2012-06-21
申请人： Ole AGESEN
发明人： Ole AGESEN
IPC分类号： G06F12/10
CPC分类号： G06F12/1009 , G06F12/1027 , G06F2212/152 , G06F2212/652 , G06F2212/68
摘要： A computer system that is programmed with virtual memory accesses to physical memory employs multi-bit counters associated with its page table entries. When a page walker visits a page table entry, the multi-bit counter associated with that page table entry is incremented by one. The computer operating system uses the counts in the multi-bit counters of different page table entries to determine where large pages can be deployed effectively. In a virtualized computer system having a nested paging system, multi-bit counters associated with both its primary page table entries and its nested page table entries are used. These multi-bit counters are incremented during nested page walks. Subsequently, the guest operating systems and the virtual machine monitors use the counts in the appropriate multi-bit counters to determine where large pages can be deployed effectively.
摘要翻译：通过对物理存储器的虚拟存储器访问进行编程的计算机系统使用与其页表条目相关联的多位计数器。当页面访问者访问页表项时，与该页表项相关联的多位计数器增加1。计算机操作系统使用不同页表项的多位计数器中的计数来确定可以有效部署大页面的位置。在具有嵌套寻呼系统的虚拟化计算机系统中，使用与其主页表条目及其嵌套页表项相关联的多位计数器。这些多位计数器在嵌套页面散播期间递增。随后，客户操作系统和虚拟机监视器使用适当的多位计数器中的计数来确定可以有效部署大页面的位置。

6. 发明申请

US20110131372A1 OPTIMIZING SEGMENT ACCESS IN BINARY TRANSLATION 有权
标题翻译：在二进制翻译中优化部门访问
公开(公告)号：US20110131372A1
公开(公告)日：2011-06-02
申请号：US12629682
申请日：2009-12-02
申请人： Ross Charles KNIPPEL , Jeffrey W. SHELDON , Ole AGESEN
发明人： Ross Charles KNIPPEL , Jeffrey W. SHELDON , Ole AGESEN
IPC分类号： G06F12/08
CPC分类号： G06F9/45516 , G06F9/45558 , G06F2009/45583
摘要： A mechanism for a binary translator to emit code that will pre-generate information about a memory segment when a segment selector is assigned to a segment register. The binary translator emits code that will be executed when a memory access using that segment register is encountered and the emitted code will access the pre-generated information when evaluating the memory access request. Memory accesses, where a number of bytes being accessed is less than or equal to a predetermined value, are validated with a minimal number of steps in the code emitted by the binary translator.
摘要翻译：一种二进制转换器发出代码的机制，当段选择器被分配给段寄存器时，该代码将预先生成关于存储器段的信息。二进制翻译器发出将在遇到使用该段寄存器的存储器访问时执行的代码，并且当评估存储器访问请求时，发出的代码将访问预生成的信息。存储器访问，其中访问的字节数小于或等于预定值，以二进制翻译器发出的代码中的最小步数进行验证。

7. 发明申请

US20100088474A1 SYSTEM AND METHOD FOR MAINTAINING MEMORY PAGE SHARING IN A VIRTUAL ENVIRONMENT 有权
标题翻译：维护虚拟环境中的内存页面共享的系统和方法
公开(公告)号：US20100088474A1
公开(公告)日：2010-04-08
申请号：US12246402
申请日：2008-10-06
申请人： Ole AGESEN
发明人： Ole AGESEN
IPC分类号： G06F12/00 , G06F9/455
CPC分类号： G06F12/08 , G06F9/45537 , G06F9/544 , G06F2209/542
摘要： In a virtualized system using memory page sharing, a method is provided for maintaining sharing when Guest code attempts to write to the shared memory. In one embodiment, virtualization logic uses a pattern matcher to recognize and intercept page zeroing code in the Guest OS. When the page zeroing code is about to run against a page that is already zeroed, i.e., contains all zeros, and is being shared, the memory writes in the page zeroing code have no effect. The virtualization logic skips over the writes, providing an appearance that the Guest OS page zeroing code has run to completion but without performing any of the writes that would have caused a loss of page sharing. The pattern matcher can be part of a binary translator that inspects code before it executes.
摘要翻译：在使用内存页面共享的虚拟化系统中，提供了一种方法，用于在访客代码尝试写入共享内存时保持共享。在一个实施例中，虚拟化逻辑使用模式匹配器来识别和拦截访客操作系统中的页面归零代码。当页面归零代码即将针对已经归零的页面运行时，即包含全部零，并且正在共享时，页面调零代码中的内存写入不起作用。虚拟化逻辑跳过写入，提供Guest OS页面调零代码已经运行到完成的外观，但不执行会导致页面共享丢失的任何写入。模式匹配器可以是在执行代码之前检查代码的二进制转换器的一部分。

8. 发明申请

US20120204061A1 METHOD AND SYSTEM FOR ENABLING CHECKPOINTING FAULT TOLERANCE ACROSS REMOTE VIRTUAL MACHINES 有权
标题翻译：通过远程虚拟机实现检查故障容错的方法和系统
公开(公告)号：US20120204061A1
公开(公告)日：2012-08-09
申请号：US13450249
申请日：2012-04-18
申请人： Ole AGESEN , Raviprasad MUMMIDI , Pratap SUBRAHMANYAM
发明人： Ole AGESEN , Raviprasad MUMMIDI , Pratap SUBRAHMANYAM
IPC分类号： G06F12/16 , G06F17/30 , G06F11/14
CPC分类号： G06F11/2097 , G06F11/2038 , G06F11/2046 , G06F2201/815
摘要： A checkpointing fault tolerance network architecture enables a backup computer system to be remotely located from a primary computer system. An intermediary computer system is situated between the primary computer system and the backup computer system to manage the transmission of checkpoint information to the backup VM in an efficient manner. The intermediary computer system is networked to the primary VM through a first connection and is networked to the backup VM through a second connection. The intermediary computer system identifies updated data corresponding to memory pages that have been least recently modified by the primary VM and transmits such updated data to the backup VM through the first connection. In such manner, the intermediary computer system holds back updated data corresponding to more recently modified memory pages, since such memory pages may be more likely to be updated again in the future.
摘要翻译：检查点容错网络架构使备份计算机系统能够远离主计算机系统。中间计算机系统位于主计算机系统和备用计算机系统之间，以有效的方式管理检查点信息传输到备份虚拟机。中间计算机系统通过第一连接与主虚拟机联网，并通过第二连接与备用虚拟机联网。中间计算机系统识别对应于由主VM最近最近修改的存储器页面的更新数据，并通过第一连接将这种更新的数据发送到备份VM。以这样的方式，中间计算机系统保持对应于最近修改的存储器页面的更新数据，因为这样的存储器页面将来可能再次被更新。

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