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    COPY AND RESTORE OF PAGE IN BYTE-ADDRESSABLE CHUNKS OF CLUSTER MEMORY
    37.
    发明申请
    COPY AND RESTORE OF PAGE IN BYTE-ADDRESSABLE CHUNKS OF CLUSTER MEMORY 有权

    公开(公告)号：US20230017804A1

    公开(公告)日：2023-01-19

    申请号：US17481418

    申请日：2021-09-22

    Applicant: VMWARE, INC.

    Inventor： MARCOS K. AGUILERA ,  Keerthi Kumar ,  Pramod Kumar ,  Pratap Subrahmanyam ,  Sairam Veeraswamy ,  Rajesh Venkatasubramanian

    IPC: G06F12/1009 ,  G06F11/10

    Abstract: Disclosed are various embodiments for improving the resiliency and performance of cluster memory. First, a computing device can submit a write request to a byte-addressable chunk of memory stored by a memory host, wherein the byte-addressable chunk of memory is read-only. Then, the computing device can determine that a page-fault occurred in response to the write request. Next, the computing device can copy a page associated with the write request from the byte-addressable chunk of memory to the memory of the computing device. Subsequently, the computing device can free the page from the memory host. Then, the computing device can update a page table entry for the page to refer to a location of the page in the memory of the computing device.

    Using cache coherent FPGAS to accelerate post-copy migration
    38.
    发明授权
    Using cache coherent FPGAS to accelerate post-copy migration 有权

    公开(公告)号：US11231949B2

    公开(公告)日：2022-01-25

    申请号：US16048183

    申请日：2018-07-27

    Applicant: VMware, Inc.

    Inventor： Irina Calciu ,  Jayneel Gandhi ,  Aasheesh Kolli ,  Pratap Subrahmanyam

    IPC: G06F9/455 ,  G06F12/0862 ,  G06F12/0815 ,  G06F15/173

    Abstract: Disclosed are embodiments for migrating a virtual machine (VM) from a source host to a destination host while the virtual machine is running on the destination host. The system includes an RDMA facility connected between the source and destination hosts and a device coupled to a local memory, the local memory being responsible for memory pages of the VM instead of the source host. The device is configured to copy pages of the VM to the destination host and to maintain correct operation of the VM by monitoring coherence events, such as a cache miss, caused by the virtual machine running on the destination host. The device services these cache misses using the RDMA facility and copies the cache line satisfying the cache miss to the CPU running the VM. The device also tracks the cache misses to create an access pattern that it uses to predict future cache misses.

    High Availability For Persistent Memory
    39.
    发明申请
    High Availability For Persistent Memory 有权

    公开(公告)号：US20220019506A1

    公开(公告)日：2022-01-20

    申请号：US17488286

    申请日：2021-09-28

    Applicant: VMware, Inc.

    Inventor： Pratap Subrahmanyam ,  Rajesh Venkatasubramanian ,  Kiran Tati ,  Qasim Ali

    IPC: G06F11/20 ,  G06F12/0804 ,  G06F1/30 ,  G06F11/14

    Abstract: Techniques for implementing high availability for persistent memory are provided. In one embodiment, a first computer system can detect an alternating current (AC) power loss/cycle event and, in response to the event, can save data in a persistent memory of the first computer system to a memory or storage device that is remote from the first computer system and is accessible by a second computer system. The first computer system can then generate a signal for the second computer system subsequently to initiating or completing the save process, thereby allowing the second computer system to restore the saved data from the memory or storage device into its own persistent memory.

    Using cache coherent FPGAS to accelerate remote memory write-back
    40.
    发明授权
    Using cache coherent FPGAS to accelerate remote memory write-back 有权

    公开(公告)号：US11126464B2

    公开(公告)日：2021-09-21

    申请号：US16048178

    申请日：2018-07-27

    Applicant: VMware, Inc.

    Inventor： Irina Calciu ,  Jayneel Gandhi ,  Aasheesh Kolli ,  Pratap Subrahmanyam

    IPC: H04L29/12 ,  G06F9/50 ,  G06F15/173 ,  G06F12/0891 ,  G06F9/455 ,  H04L12/935 ,  H04L29/08

    Abstract: Disclosed is a method for performing write-back operations to maintain coherence of remote memories in a memory pool. When a local application makes a request for a page of memory that is in the memory pool but not local, a device obtains the page through its RDMA facility and thereafter keeps track of the page for any changes made by the application to the page by storing the page locally and monitoring cache coherency events of cache lines that make up the page. If a requested page become dirty, then periodically the dirty cache lines of the dirty page are written back to the remote memory from which the pages were obtained. In addition, all dirty cache lines are written back when the local memory storing the page becomes full or the application closes a region containing the page.

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