Wind River Systems, Inc.

Nortel Networks Corporation

Mark Dapoz

Gary Kenneth Boon

Raymond Richardson

Keith Clifford Dysart

France Tremblay

Martin Cocking

Greg Waines

The exemplary embodiments are related to a device, a system, and a method for implementing a hardware mechanism that is configured to validate the performance of scheduling software utilized by a safety-critical system. The hardware device may receive an indication that a first frame of a frame schedule is in use. The hardware device may also monitor a time parameter corresponding to the first frame. The hardware device may also determine whether an indication that a second frame of the frame schedule is in use is received prior to the expiration of the time parameter. When the indication that the second frame of the frame scheduler is in use is not received prior to the expiration of time parameter, the hardware device may send a signal to an operating system of the safety-critical system indicating that an error in executing the frame scheduled has occurred.

Hardware validation of safety critical scheduling

A computer readable storage medium storing a set of instructions executable by a processor. The set of instructions is operable to receive, from a first processor, a message to be sent to a second processor; store the message in a portion of a shared memory, the shared memory being shared by the first processor and the second processor; store, in an instruction list stored in a further portion of the shared memory, an instruction corresponding to the message; and prompt the second processor to read the message list.

Method and system for lockless interprocessor communication

A device, system, and method processes a request for allocation of a resource of an electronic device utilizing a secure supervisor system call. The method includes receiving a call from a requesting application of the electronic device, the call indicating the request for allocation of the resource of the electronic device. The method includes determining whether the call is authorized to receive the resource of the electronic device. The determining includes determining whether the call includes a signature that is generated based upon a predetermined signature operation and determining whether the signature is valid based upon the predetermined signature operation when the call includes the signature. The method includes processing the request for the allocation of the resource when the call is determined to be authorized.

Device, system, and method for secure supervisor system calls

A scheduler of central processing unit (CPU) usage arranges tasks in a plurality of classes, associating a given task with a top level class and a sub-class. Weights may be associated with sub-classes and usage targets associated with top level classes. A target CPU usage may then be determined for the given task from a weight and a target CPU usage. Once an actual usage of the CPU by the given task is determined in a first predetermined evaluation interval, a penalty duration may be determined for the given task based on the actual usage and the target CPU usage. A penalty may then be applied to the given task for the penalty duration during a second predetermined evaluation interval.

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Kanata, Canada

Mark Dapoz