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公开(公告)号：US20230161676A1
公开(公告)日：2023-05-25
申请号：US17992836
申请日：2022-11-22
Applicant: VMware, Inc.
Inventor： Ganesh Venkitachalam , Rohit Jain , Boris Weissman , Daniel J. Scales , Vyacheslav Vladimirovich Malyugin , Jeffrey W. Sheldon , Min Xu
CPC classification number: G06F11/1658 , G06F11/0766 , G06F11/079 , G06F11/0712 , G06F9/45533 , G06F9/45558 , G06F9/4881 , G06F2009/45579 , G06F2009/45591 , G06F2201/805 , G06F2201/815 , G06F2201/82
Abstract: System and method for providing fault tolerance in virtualized computer systems use a first guest and a second guest running on virtualization software to produce outputs, which are produced when a workload is executed on the first and second guests. An output of the second guest is compared with an output of the first guest to determine if there is an output match. If there is no output match, the first guest is paused and a resynchronization of the second guest is executed to restore a checkpointed state of the first guest on the second guest. After the resynchronization of the second guest, the paused first guest is caused to resume operation.
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公开(公告)号：US10579485B2
公开(公告)日：2020-03-03
申请号：US15284465
申请日：2016-10-03
Applicant: VMware, Inc.
Inventor： Ganesh Venkitachalam , Rohit Jain , Boris Weissman , Daniel J. Scales , Vyacheslav Vladimirovich Malyugin , Jeffrey W. Sheldon , Min Xu
Abstract: In a computer system running at least a first virtual machine (VM) and a second VM on virtualization software, a computer implemented method for the second VM to provide quasi-lockstep fault tolerance for the first VM includes executing a workload on the first VM and the second VM that involves producing at least one externally visible output and comparing an externally visible output of the second VM with an externally visible output of the first VM to determine if there is an output match. In response to a determination that the externally visible output of the second VM does not match the externally visible output of the first VM, a resynchronization of the second VM is executed. The externally visible output of the first VM is kept from being output externally until completion of the resynchronization.
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3.发明授权公开(公告)号：US08875162B2
公开(公告)日：2014-10-28
申请号：US13963442
申请日：2013-08-09
Applicant: VMware, Inc.
Inventor： Ole Agesen , Boris Weissman , Keith Adams , Jennifer-Ann M. Anderson , Maxime Austruy
CPC classification number: G06F9/45508 , G06F9/45558 , G06F9/4825 , G06F2009/45579
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US10394560B2
公开(公告)日：2019-08-27
申请号：US15256489
申请日：2016-09-02
Applicant: VMware, Inc.
Inventor： Vyacheslav V. Malyugin , Min Xu , Boris Weissman , Ganesh Venkitachalam , Alexander Klaiber
Abstract: The output of a non-deterministic instruction is handled during record and replay in a virtual machine. An output of a non-deterministic instruction is stored to a buffer during record mode and retrieved from a buffer during replay mode without exiting to the hypervisor. At least part of the contents of the buffer can be stored to a log when the buffer is full during record mode, and the buffer can be replenished from a log when the buffer is empty during replay mode.
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公开(公告)号：US09928180B2
公开(公告)日：2018-03-27
申请号：US15437369
申请日：2017-02-20
Applicant: VMware, Inc.
Inventor： Vyacheslav Vladimirovich Malyugin , Boris Weissman , Ganesh Venkitachalam , Min Xu
IPC: G06F12/00 , G06F13/00 , G06F13/28 , G06F12/1027 , G06F9/455 , G06F12/0891 , G06F12/1045 , G06F12/1009
CPC classification number: G06F12/1027 , G06F9/45558 , G06F12/0891 , G06F12/1009 , G06F12/1036 , G06F12/1045 , G06F12/109 , G06F2009/45583 , G06F2212/152 , G06F2212/305 , G06F2212/65 , G06F2212/683
Abstract: The translation lookaside buffer (TLB) of a processor is kept in synchronization with a guest page table by use of an indicator referred to as a “T” bit. The T bit of the NPT/EPT entries mapping the guest page table are set when a page walk is performed on the NPT/EPT. When modifications are made to pages mapped by NPT/EPT entries with their T bit set, changes to the TLB are made so that the TLB remains in synchronization with the guest page table. Accordingly, record/replay of virtual machines of virtualized computer systems may be performed reliably with no non-determinism introduced by stale TLBs that fall out of synchronization with the guest page table.
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Patent Agency Ranking
公开(公告)号：US09575899B2
公开(公告)日：2017-02-21
申请号：US14954346
申请日：2015-11-30
Applicant: VMware, Inc.
Inventor： Vyacheslav Vladimirovich Malyugin , Boris Weissman , Ganesh Venkitachalam , Min Xu
CPC classification number: G06F12/1027 , G06F9/45558 , G06F12/0891 , G06F12/1009 , G06F12/1036 , G06F12/1045 , G06F12/109 , G06F2009/45583 , G06F2212/152 , G06F2212/305 , G06F2212/65 , G06F2212/683
Abstract: The translation lookaside buffer (TLB) of a processor is kept in synchronization with a guest page table by use of an indicator referred to as a “T” bit. The T bit of the NPT/EPT entries mapping the guest page table are set when a page walk is performed on the NPT/EPT. When modifications are made to pages mapped by NPT/EPT entries with their T bit set, changes to the TLB are made so that the TLB remains in synchronization with the guest page table. Accordingly, record/replay of virtual machines of virtualized computer systems may be performed reliably with no non-determinism introduced by stale TLBs that fall out of synchronization with the guest page table.
Abstract translation: 处理器的翻译后备缓冲器（TLB）通过使用称为“T”位的指示符与访客页表保持同步。 在NPT / EPT上执行页面移动时，设置映射访客页表的NPT / EPT条目的T位。 当对具有T位置位的NPT / EPT条目映射的页面进行修改时，进行TLB的更改，使得TLB与访客页表保持同步。 因此，可以可靠地执行虚拟化计算机系统的虚拟机的记录/重放，而不会由与访客页表不同步的失效TLB引入非确定性。
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公开(公告)号：US11507477B2
公开(公告)日：2022-11-22
申请号：US16801096
申请日：2020-02-25
Applicant: VMware, Inc.
Inventor： Ganesh Venkitachalam , Rohit Jain , Boris Weissman , Daniel J. Scales , Vyacheslav Vladimirovich Malyugin , Jeffrey W. Sheldon , Min Xu
Abstract: System and method for providing fault tolerance in virtualized computer systems use a first guest and a second guest running on virtualization software to produce outputs, which are produced when a workload is executed on the first and second guests. An output of the second guest is compared with an output of the first guest to determine if there is an output match. If there is no output match, the first guest is paused and a resynchronization of the second guest is executed to restore a checkpointed state of the first guest on the second guest. After the resynchronization of the second guest, the paused first guest is caused to resume operation.
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公开(公告)号：US11182188B2
公开(公告)日：2021-11-23
申请号：US15956283
申请日：2018-04-18
Applicant: VMware, Inc.
Inventor： Boris Weissman , Sazzala Reddy
Abstract: Techniques for replicating virtual machine data is provided. A plurality of compute nodes running on a primary cluster determine the amount of virtual machine data cached within each compute node. Based on the amount of virtual machine data for a particular virtual machine, a particular compute node is assigned to replicate the data to a secondary cluster. The amount of particular virtual machine data copied to the secondary cluster is based on updated virtual machine data that belongs to a particular state of the virtual machine. The destination of the particular virtual machine data is based on available cache space and prior replication statistics for target compute nodes on the secondary cluster.
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公开(公告)号：US20170024291A1
公开(公告)日：2017-01-26
申请号：US15284465
申请日：2016-10-03
Applicant: VMware, Inc.
Inventor： Ganesh Venkitachalam , Rohit Jain , Boris Weissman , Daniel J. Scales , Vyacheslav Vladimirovich Malyugin , Jeffrey W. Sheldon , Min Xu
CPC classification number: G06F11/1658 , G06F9/45533 , G06F9/45558 , G06F9/4881 , G06F11/0712 , G06F11/0766 , G06F11/079 , G06F2009/45579 , G06F2009/45591 , G06F2201/805 , G06F2201/815 , G06F2201/82
Abstract: In a computer system running at least a first virtual machine (VM) and a second VM on virtualization software, a computer implemented method for the second VM to provide quasi-lockstep fault tolerance for the first VM includes executing a workload on the first VM and the second VM that involves producing at least one externally visible output and comparing an externally visible output of the second VM with an externally visible output of the first VM to determine if there is an output match. In response to a determination that the externally visible output of the second VM does not match the externally visible output of the first VM, a resynchronization of the second VM is executed. The externally visible output of the first VM is kept from being output externally until completion of the resynchronization.
Abstract translation: 在运行虚拟化软件上的至少第一虚拟机（VM）和第二VM的计算机系统中，用于第二VM为第一虚拟机提供准锁步骤容错的计算机实现方法包括执行第一虚拟机上的工作负载，以及 所述第二VM涉及产生至少一个外部可见的输出并将所述第二VM的外部可见的输出与所述第一VM的外部可见的输出进行比较，以确定是否存在输出匹配。 响应于确定第二VM的外部可见输出与第一VM的外部可见的输出不匹配，则执行第二VM的重新同步。 第一个VM的外部可见的输出保持不被外部输出，直到重新同步完成。
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10.发明授权公开(公告)号：US09436471B2
公开(公告)日：2016-09-06
申请号：US13926605
申请日：2013-06-25
Applicant: VMware, Inc.
Inventor： Vyacheslav V. Malyugin , Min Xu , Boris Weissman , Ganesh Venkitachalam , Alexander Klaiber
CPC classification number: G06F9/30145 , G06F9/3005 , G06F9/45533 , G06F11/301 , G06F11/3024 , G06F11/3414 , G06F11/3476
Abstract: The output of a non-deterministic instruction is handled during record and replay in a virtual machine. An output of a non-deterministic instruction is stored to a buffer during record mode and retrieved from a buffer during replay mode without exiting to the hypervisor. At least part of the contents of the buffer can be stored to a log when the buffer is full during record mode, and the buffer can be replenished from a log when the buffer is empty during replay mode.
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