Tidalscale, Inc.

Hewlett Packard Enterprise Development LP

Brian Moffet

Isaac Robert Nassi

David P Reed

Michael Berman

Kleoni Ioannidou

Mark Hill

Jeffrey Paul Radick

I-Chun Fang

Keith R Reynolds

Keith Reynolds

John Houston Gray

Charles Joseph Levine

Handling frequently accessed pages is disclosed. An indication is received of a stalling event caused by a requested portion of memory being inaccessible. It is determined that the requested portion of memory is a frequently updated portion of memory. The stalling event is handled based at least in part on the determination that the requested portion of memory is a frequently updated portion of memory.

Handling frequently accessed pages

Initializing a software-defined server having software-defined NUMA domains includes, when booting a virtual environment defined by a set of hyper-kernels running on a plurality of physically interconnected computing nodes, accessing information associated with a software-defined NUMA domain configuration. It further includes, based at least in part on the accessed information, assigning software-defined NUMA domains to computing nodes. It further includes assigning virtualized resources to the software-defined NUMA domains. Handling a stalling event involving software-defined NUMA domains includes receiving an indication that a core or hyperthread which instantiates a virtual processor cannot access a virtualized resource needed by the core or hyperthread. It further includes determining, based at least in part on at least one of (1) a software-defined NUMA (Non Uniform Memory Access) domain to which the needed virtualized resource is assigned, (2) a software-defined NUMA domain to which the virtual processor is assigned, or (3) a software-defined NUMA domain associated with a computing node that has the core or hyperthread, whether to perform at least one of migrating the virtual processor or migrating the needed virtualized resource.

Goal-directed software-defined NUMA working set management

Hierarchical stalling strategies are disclosed. An indication is received of a stalling event caused by a requested resource being inaccessible. In response to receiving the indication of the stalling event, a set of cost functions usable to determine how to handle the stalling event is selected based at least in part on a type of the stalling event. The stalling event is handled based at least in part on an evaluation of the set of cost functions selected based at least in part on the type of the stalling event.

Hierarchical stalling strategies for handling stalling events in a virtualized environment

Resource migration negotiation is disclosed. A request is received, from a remote physical node in a plurality of physical nodes, for a resource. An operating system is run collectively across the plurality of physical nodes. The request includes information pertaining to a guest thread running on the remote physical node. Based at least in part on at least some of the information included in the request, it is determined whether to send the requested resource or reject the request. A response is provided based at least in part on the determination.

Resource migration negotiation

Associating working sets and threads is disclosed. An indication of a stalling event is received. In response to receiving the indication of the stalling event, a state of a processor associated with the stalling event is saved. At least one of an identifier of a guest thread running in the processor and a guest physical address referenced by the processor is obtained from the saved processor state.

Growing community of inventors

Santa Cruz, CA, United States of America

Brian Moffet