Accedian Networks Inc.

Andre Dupont

Thierry DeCorte

Frederick Lafleche

A system is provided for multicasting an event notification from an event producer to multiple event listeners, where the event producer and event listeners exist within a computer operating system having a user space, a kernel space, a device space, and an event protocol handler located in the kernel space. The system generates an event indication from an event producer located in the user space, kernel space, or device space, and receiving the event indication in the event protocol handler and generating an event notification. The event producer and the event listeners interface with the event protocol handler to send the event indication and receive the event notification. The event listeners may be located in the user space, kernel space, or device space.

Multicasting of event notifications using extended socket for inter-process communication

A method is provided for efficiently scheduling timer events within an operating system by allocating a plurality of timers, each of which has an expiry time, to a set of available timer slots. The method defines a timer spread value that denotes the allowed variance of the expiry times of each of the timers, calculates a set of available timer slots for each of the timers based on the timer spread value, and adjusts the expiry times of the timers so as to insert and evenly spread the timers across the set of available timer slots. In one implementation, the set of available timer slots is located in a timer wheel existing within the operating system, and the timer wheel uses a plurality of timer vectors arranged into successively increasing levels, beginning with level zero.

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St-Laurent, Canada

Andre Dupont