Vmware, Inc.

Stmicroelectronics Gmbh

Aidan Cully

Oleg Logvinov

Mazhar I Memon

James D Allen

Michael John Macaluso

David Lawrence

Dušan Veljko

Hyojong Kim

Duan Veljko

Vance Miller

Husheng Zhou

A method for executing an application over a plurality of nodes in each of which an application monitor and a runtime are executing includes executing a first portion of the application by first threads of the runtime of the first node and a second portion of the application by second threads of the runtime of the second node, and under control of the application monitors of the first and second nodes and while executing the first portions and second portions of the application, migrating workloads of one or more of the first threads from the first node to the second node for execution by the second threads.

Co-execution of an application among a plurality of compute nodes through application-level virtualization

A coherence protocol applied to memory pages maintains coherence between memory spaces on a plurality of nodes so that the threads of the runtime are operable on any of the nodes. The nodes operating according to the coherence protocol track a state and an epoch number for each memory page residing therein. The states include a modified state in which only one particular node has an up-to-date copy of the memory page, an exclusive state in which only one particular node owns the memory page, a shared state in which all nodes that have the memory page in the shared state have the same copy, and a lost state in which the memory page cannot be either read or written. The epoch number is a number that is incremented each time the page enters the modified state and is used to determine whether the page contains data that is stale.

Memory coherency in application-level virtualization

At least one application of a client executes via system software on a hardware computing system that includes at least one CPU and at least one coprocessor. A virtualization layer establishes unified memory address space between the client and the hardware computing system, which also includes memory associated with the at least one coprocessor. The virtualization layer then synchronizes memory associated with the client and memory associated the at least one coprocessor. The virtualization layer may be installed and run in a non-privileged, user space, without modification of the application or of the system software running on the hardware computing system.

Unified host memory for coprocessors

Execution of multiple execution streams is scheduled on at least one coprocessor. A software layer located logically between applications and the at least one coprocessor intercepts a first API call from an application and determines that a first execution stream is to be executed. Before scheduling the first execution stream, the software layer transmits a response to the application indicating that the at least one coprocessor is ready to execute another execution stream. The software layer intercepts a second API call from the application and determines that a second execution stream including one or more kernels is to be executed. The software layer determines that the one or more kernels does not have a dependency on the first execution stream. The software layer schedules the one or more kernels for execution prior to when the at least one coprocessor has completed execution of the first execution stream.

Intelligent scheduling of coprocessor execution

A method for a dynamic linker to load and run an application that is executed over a plurality of nodes, includes relocating a primary binary of the application from an initial location to an executable location, loading library dependencies, altering a system call table used during execution of the application for the dynamic linker to catch all system calls made by the application, and executing the relocated primary binary from the executable location.

Dynamic linker for loading and running an application over a plurality of nodes

Execution of multiple execution streams is scheduled on a plurality of coprocessors. A software layer located logically between applications and the coprocessors determines dependencies within the execution streams, each said dependency being a condition in one of the execution streams that must be satisfied in order for execution of at least one other of the execution streams to proceed on corresponding ones of the coprocessors. The dependencies are then represented in a data structure and an optimized execution schedule is determined for the execution streams according to the dependencies. Simultaneous execution of a plurality of the execution streams is then dynamically reordered according to the optimized execution schedule.

In accordance with an embodiment, a network device includes a network controller and at least one network interface coupled to the network controller that includes at least one media access control (MAC) device configured to be coupled to at least one physical layer interface (PHY). The network controller may be configured to determine a network path comprising the at least one network interface that has a lowest power consumption and minimum security attributes of available media types coupled to the at least one PHY.

System and method for an energy efficient network adaptor with security provisions

Multicast transmissions are efficient but do not allow for individual acknowledgement that the data was received by each receiver. This is not acceptable for isochronous systems that require specific levels of QoS for each device. A multimedia communications protocol is provided that uses a novel multi-destination burst transmission protocol in multimedia isochronous systems. The transmitter establishes a bi-directional burst mode for multicasting data to multiple devices and receiving Reverse Start of Frame (RSOF) delimiters from each multicast-destination receiver in response to multiple SOF delimiters, thus providing protocol-efficient multi-destination acknowledgements.

Multi-destination burst protocol

Multicast transmissions do not allow for individual receivers to acknowledge that data was received by each receiver in the network. This is not acceptable for isochronous systems that require specific levels of QoS for each device. A multimedia communications protocol supports using multicast transmissions (one-to-many) in multimedia isochronous systems. A transmitter establishes a Multi-ACKed Multicast protocol within which a group of receiving devices can acknowledge the multicast transmission during a multi-acknowledgment period.

Multi-acked multicast protocol

In accordance with an embodiment, a network device includes a network controller and at least one network interface coupled to the network controller that includes at least one media access control (MAC) device configured to be coupled to at least one physical layer interface (PHY). The network controller may be configured to determine a network path comprising the at least one network interface that has a lowest power consumption of available media types coupled to the at least one PHY.

Growing community of inventors

St. Augustine, FL, United States of America

Aidan Cully