Wind River Systems, Inc.

Markus Carlstedt

Kenneth Jonsson

Rikard Mendel

Described is a two-phase spinlock that controls access to a resource from a plurality of threads. The two-phase spinlock receives requests from threads to acquire the resource, places the threads in a first queue associated with a first phase of the two-phase spinlock, determines whether at least one of a predetermined number of slots in a second phase of the two-phase spinlock is available and when the slots are unavailable, processes an interrupt served by a select one of the threads based on a number of attempts by the selected thread to enter the second phase.

Systems and methods for interrupting latency optimized two-phase spinlock

A system and method for implementing a generation lock for protecting a data structure is provide. The systems and methods synchronizes read and write transactions for a protected data structure in a multitasking environment and provides low latency and improved scalability. For example, a system and method for implementing a generation lock for protecting a data structure may be provided. The generation lock provides an improved mechanism for restricting access to a data structure that is typically read more often than written. Specifically, the generation lock provides a method for reading and writing to a protected data structures that has a low average latency as compared to traditional read/write semaphores. The generation lock also provides a mechanism in which the system is scalable, meaning that the addition of additional processor cores is capable of increasing the performance, e.g., rate of executing requests, of the system, and is not or is not substantially rate limited by a shared resource.

Method and system for implementing generation locks

A device, system, and method determines a forwarding delay through a networking device. The method is performed at the networking device including a transceiver and an always running timer (ART). The method includes generating a first timestamp using a first clock of the transceiver when a packet to be forwarded has been received. The method includes capturing a first ART time corresponding to the first timestamp. The method includes generating a second timestamp using a second clock of the transceiver when the packet to be forwarded has been transmitted. The method includes capturing a second ART time corresponding to the second timestamp. The method includes determining a forwarding delay based on the first and second timestamps and the first and second ART times.

Device, system, and method for determining a forwarding delay through a networking device

A device, system, and method synchronizes time partition windows. The method performed at a first electronic device includes receiving a clock signal from a second electronic device, the clock signal indicating a modification to synchronize a first clock of the first electronic device to a second clock of the second electronic device. The method includes generating an operating system tick interrupt based on the clock signal, the operating system tick interrupt indicating a modification to synchronize a first operating system tick of the first electronic device to a second operating system tick of the second electronic device. The method includes generating a first schedule of first time partition windows based on the first operating system tick. The first schedule of the first time partition windows is synchronized to a second schedule of second time partition windows of the second electronic device.

Device, system, and method for synchronizing time partition windows

A method includes duplicating, by an acceleration engine that is associated with a software application executing in a computing environment, a state of a kernel stack of an operating system of the computing environment to generate a duplicate network stack; receiving, by the acceleration engine, a request by the software application to send traffic over a network interface; and sending, by the acceleration engine, the request to a network driver relating to the network interface.

Method and system for transparent network acceleration

A method includes receiving a request to access a resource; determining a presence of a memory buffer in a hardware-assisted memory pool; and determining a response to the request to access the resource based on the presence of the memory buffer. A system includes a plurality of processors, a resource, and a hardware-assisted memory pool including a memory buffer; one of the plurality of processors receives a request to access the resource, determines a presence of the memory buffer, and determines a response to the request to access the resource based on the presence of the memory buffer.

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Uppsala, Sweden

Markus Carlstedt