公开(公告)号：US20140164722A1

公开(公告)日：2014-06-12

申请号：US13710185

申请日：2012-12-10

Applicant: VMWARE, INC.

Inventor： Alexander Thomas GARTHWAITE ,  Yury BASKAKOV ,  Irene ZHANG ,  Kevin Scott CHRISTOPHER ,  Jesse POOL

IPC: G06F12/16

CPC classification number: G06F12/16 ,  G06F11/00

Abstract: A process for lazy checkpointing a virtual machine is enhanced to reduce the number of read/write accesses to the checkpoint file and thereby speed up the checkpointing process. The process for saving a state of a virtual machine running in a physical machine to a checkpoint file maintained in persistent storage includes the steps of copying contents of a block of memory pages, which may be compressed, into a staging buffer, determining after the copying if the buffer is full, and upon determining that the buffer is full, saving the buffer contents in a storage block of the checkpoint file.

Abstract translation: 增强了对虚拟机进行懒惰检查点的过程，以减少对检查点文件的读/写访问次数，从而加快了检查点处理过程。 将在物理机器中运行的虚拟机的状态保存到持久存储器中维护的检查点文件的过程包括以下步骤：将可压缩的存储器页块的内容复制到暂存缓冲器中，在复制之后确定 如果缓冲区已满，并且在确定缓冲区已满时，将缓冲区内容保存在检查点文件的存储块中。

公开(公告)号：US20160170906A1

公开(公告)日：2016-06-16

申请号：US15051940

申请日：2016-02-24

Applicant: VMware, Inc.

Inventor： Yury BASKAKOV ,  Alexander Thomas GARTHWAITE ,  Rajesh VENKATASUBRAMANIAN ,  Irene ZHANG ,  Seongbeom KIM ,  Nikhil BHATIA ,  Kiran TATI

IPC: G06F12/12 ,  G06F9/455 ,  G06F12/02

CPC classification number: G06F12/121 ,  G06F9/45558 ,  G06F12/023 ,  G06F12/1009 ,  G06F12/1027 ,  G06F2009/45583 ,  G06F2212/1016 ,  G06F2212/1044

Abstract: Memory performance in a computer system that implements large page mapping is improved even when memory is scarce by identifying page sharing opportunities within the large pages at the granularity of small pages and breaking up the large pages so that small pages within the large page can be freed up through page sharing. In addition, the number of small page sharing opportunities within the large pages can be used to estimate the total amount of memory that could be reclaimed through page sharing.

公开(公告)号：US20140164723A1

公开(公告)日：2014-06-12

申请号：US13710215

申请日：2012-12-10

Applicant: VMWARE, INC.

Inventor： Alexander Thomas GARTHWAITE ,  Yury BASKAKOV ,  Irene ZHANG ,  Kevin Scott CHRISTOPHER ,  Jesse POOL

IPC: G06F12/16

CPC classification number: G06F12/16 ,  G06F9/45558 ,  G06F9/461 ,  G06F2009/45575 ,  G06F2009/45583

Abstract: A process for lazy checkpointing is enhanced to reduce the number of read/write accesses to the checkpoint file and thereby speed up the checkpointing process. The process for restoring a state of a virtual machine (VM) running in a physical machine from a checkpoint file that is maintained in persistent storage includes the steps of detecting access to a memory page of the virtual machine that has not been read into physical memory of the VM from the checkpoint file, determining a storage block of the checkpoint file to which the accessed memory page maps, writing contents of the storage block in a buffer, and copying contents of a block of memory pages that includes the accessed memory page from the buffer to corresponding locations of the memory pages in the physical memory of the VM. The storage block of the checkpoint file may be compressed or uncompressed.

Abstract translation: 增强了用于延迟检查点的过程，以减少对检查点文件的读/写访问次数，从而加快了检查点处理过程。 从维护在持久存储器中的检查点文件恢复在物理机器中运行的虚拟机（VM）的状态的过程包括以下步骤：检测对尚未被读入物理存储器的虚拟机的存储器页面的访问 从所述检查点文件确定所述VM的存储块，确定所访问的存储器页映射到的所述检查点文件的存储块，将所述存储块的内容写入缓冲器，以及将包括所访问的存储器页的存储器页块的内容从 缓冲区到VM的物理内存中的内存页的相应位置。 检查点文件的存储块可以被压缩或未压缩。