公开(公告)号：US11099871B2

公开(公告)日：2021-08-24

申请号：US16048182

申请日：2018-07-27

Applicant: VMware, Inc.

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

IPC: G06F9/455 ,  G06F12/0891

Abstract: A virtual machine running on a source host is live migrated to a destination host. The source host includes a first processing node with a first processing hardware and a first memory, and a second processing node with a second processing hardware and a second memory. While the virtual machine is running on the first processing hardware, the second processing hardware tracks cache lines of the first processing hardware that become dirty as a result of write operations performed on one or more memory pages of the virtual machine. The dirty cache lines are copied to the destination host in units of a cache line or groups of cache lines.

公开(公告)号：US20210133032A1

公开(公告)日：2021-05-06

申请号：US17144082

申请日：2021-01-07

Applicant: VMware, Inc.

Inventor： Pratap Subrahmanyam ,  Rajesh Venkatasubramanian ,  Kiran Tati ,  Qasim Ali ,  Marcos Aguilera ,  Irina Calciu ,  Venkata Subhash Reddy Peddamallu ,  Xavier Deguillard ,  Yi Yao

IPC: G06F11/14 ,  G06F16/27 ,  G06F1/26 ,  G06F11/20

Abstract: Techniques for achieving application high availability via application-transparent battery-backed replication of persistent data are provided. In one set of embodiments, a computer system can detect a failure that causes an application of the computer system to stop running. In response to detecting the failure, the computer system can copy persistent data written by the application and maintained locally at the computer system to one or more remote destinations, where the copying is performed in a manner that is transparent to the application and while the computer system runs on battery power. The application can then be restarted on another computer system using the copied data.

公开(公告)号：US10977074B2

公开(公告)日：2021-04-13

申请号：US16102411

申请日：2018-08-13

Applicant: VMware, Inc.

Inventor： Xiaoxin Chen ,  Carl A. Waldspurger ,  Pratap Subrahmanyam

IPC: G06F9/46 ,  G06F9/448 ,  G06F9/455 ,  G06F9/48 ,  G06F11/14

Abstract: A virtual-machine-based system that identifies an application or process in a virtual machine in order to locate resources associated with the identified application. Access to the located resources is then controlled based on a context of the identified application. Those applications without the necessary context will have a different view of the resource.

公开(公告)号：US10929295B2

公开(公告)日：2021-02-23

申请号：US16255432

申请日：2019-01-23

Applicant: VMware, Inc.

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

IPC: G06F12/00 ,  G06F12/0853 ,  G06F12/1045 ,  G06F12/0804 ,  G06F12/0817 ,  G06F12/1009

Abstract: Described herein is a method for tracking changes made by an application. Embodiments include determining, by a processor, a write-back of a cache line from a hardware unit associated with a socket of a plurality of sockets to a page table entry of a page table in a memory location associated with the processor. Embodiments include adding, by the processor, the cache line to a list of dirty cache lines. Embodiments include, for each respective cache line in the list of dirty cache lines, identifying, by the processor, a memory location associated with a respective socket of the plurality of sockets corresponding to the respective cache line and updating, by the processor, an entry of a page table replica at the memory location based on the respective cache line.

公开(公告)号：US10761984B2

公开(公告)日：2020-09-01

申请号：US16048186

申请日：2018-07-27

Applicant: VMware, Inc.

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

IPC: G06F9/455 ,  G06F12/0815 ,  G06F12/0862 ,  G06F12/1009

Abstract: Disclosed are embodiments for running an application on a local processor when the application is dependent on pages not locally present but contained in a remote host. The system is informed that the pages on which the application depends are locally present. While running, the application encounters a cache miss and a cache line satisfying the miss from the remote host is obtained and provided to the application. Alternatively, the page containing the cache line satisfying the miss is obtained and the portion of the page not including the cache line is stored locally while the cache line is provided to the application. The cache miss is discovered by monitoring coherence events on a coherence interconnect connected to the local processor. In some embodiments, the cache misses are tracked and provide a way to predict a set of pages to be pre-fetched in anticipation of the next cache misses.

公开(公告)号：US10248445B2

公开(公告)日：2019-04-02

申请号：US14716746

申请日：2015-05-19

Applicant: VMware, Inc.

Inventor： Dilip Khandekar ,  Dragutin Petkovic ,  Pratap Subrahmanyam ,  Bich Cau Le

IPC: G06F9/455

Abstract: A provisioning server automatically configures a virtual machine (VM) according to user specifications and then deploys the VM on a physical host. The user may either choose from a list of pre-configured, ready-to-deploy VMs, or he may select which hardware, operating system and application(s) he would like the VM to have. The provisioning server then configures the VM accordingly, if the desired configuration is available, or it applies heuristics to configure a VM that best matches the user's request if it isn't. The invention also includes mechanisms for monitoring the status of VMs and hosts, for migrating VMs between hosts, and for creating a network of VMs.

公开(公告)号：US10169253B2

公开(公告)日：2019-01-01

申请号：US15682056

申请日：2017-08-21

Applicant: VMware, Inc.

Inventor： Xiaoxin Chen ,  Carl A. Waldspurger ,  Pratap Subrahmanyam ,  Tal Garfinkel ,  Dan Boneh

IPC: G06F12/14 ,  G06F21/62

Abstract: A virtual-machine-based system that may protect the privacy and integrity of application data, even in the event of a total operating system compromise. An application is presented with a normal view of its resources, but the operating system is presented with an encrypted view. This allows the operating system to carry out the complex task of managing an application's resources, without allowing it to read or modify them. Different views of “physical” memory are presented, depending on a context performing the access. An additional dimension of protection beyond the hierarchical protection domains implemented by traditional operating systems and processors is provided.

公开(公告)号：US11726811B2

公开(公告)日：2023-08-15

申请号：US17351488

申请日：2021-06-18

Applicant: VMware, Inc.

Inventor： Yizhou Shan ,  Marcos Kawazoe Aguilera ,  Pratap Subrahmanyam ,  Rajesh Venkatasubramanian

IPC: G06F9/46 ,  G06F9/48 ,  G06F9/54

CPC classification number: G06F9/4812 ,  G06F9/461 ,  G06F9/545

Abstract: Disclosed are various embodiments for decreasing the amount of time spent processing interrupts by switching contexts in parallel with processing an interrupt. An interrupt request can be received during execution of a process in a less privileged user mode. Then, the current state of the process can be saved. Next, a switch from the less privileged mode to a more privileged mode can be made. The interrupt request is then processed while in the more privileged mode. Subsequently or in parallel, and possibly prior to completion of the processing the interrupt request, another switch from the more privileged mode to the less privileged mode can be made.

公开(公告)号：US20230205649A1

公开(公告)日：2023-06-29

申请号：US18175450

申请日：2023-02-27

Applicant: VMware, Inc.

Inventor： Andreas Nowatzyk ,  Pratap Subrahmanyam ,  Isam Akkawi

IPC: G06F11/14 ,  G06F12/0815 ,  G06F11/07 ,  G06F9/30 ,  G06F9/46 ,  G06F15/173

CPC classification number: G06F11/1469 ,  G06F11/1464 ,  G06F11/1451 ,  G06F12/0815 ,  G06F11/0757 ,  G06F9/30043 ,  G06F9/467 ,  G06F11/0772 ,  G06F15/1735 ,  G06F2212/2542

Abstract: Techniques for implementing hardware-assisted memory disaggregation with recovery from network failures/problems are provided. In one set of embodiments, a hardware controller of a computer system can maintain a copy of a “remote memory” of the computer system (i.e., a section of the physical memory address space of the computer system that maps to a portion of the physical system memory of a remote computer system) in a local backup memory. The backup memory may be implemented using a non-volatile memory that is slower, but also less expensive, than conventional dynamic random-access memory (DRAM). Then, if the hardware controller is unable to retrieve data in the remote memory from the remote computer system within a specified time window due to, e.g., a network failure or other problem, the hardware controller can retrieve the data from the backup memory, thereby avoiding a hardware error condition (and potential application/system crash).

公开(公告)号：US11650747B2

公开(公告)日：2023-05-16

申请号：US17344514

申请日：2021-06-10

Applicant: VMware, Inc.

Inventor： Emmanuel Amaro Ramirez ,  Marcos Kawazoe Aguilera ,  Pratap Subrahmanyam ,  Rajesh Venkatasubramanian

IPC: G06F3/06

CPC classification number: G06F3/064 ,  G06F3/0604 ,  G06F3/0679

Abstract: Disclosed are various embodiments for high throughput reclamation of pages in memory. A first plurality of pages in a memory of the computing device are identified to reclaim. In addition, a second plurality of pages in the memory of the computing device are identified to reclaim. The first plurality of pages are prepared for storage on a swap device of the computing device. Then, a write request is submitted to a swap device to store the first plurality of pages. After submission of the write request, the second plurality of pages are prepared for storage on the swap device while the swap device completes the write request.