International Business Machines Corporation

Theodore Y Tso

Paul Edward McKenney

Claudia Andrea Salzberg

John K Whetzel

Albert Andre Asselin

Jeffrey Michael Franke

Torez Smith

Peter H Reynolds

Keith Mannthey

Rene Vandenbroeck

A computing system is provided with real-time capabilities so that the system is capable of running applications such that one or more real-time criteria are satisfied. An interrupt architecture of the computing system is disabled. The interrupt architecture generates interrupts sent to a firmware of the computing system in response to events. A different architecture is substituted within the computing system for the interrupt architecture. The different architecture is responsive to the events without violating the real-time criteria. In response to the events occurring, the different architecture causes one or more corrective actions to be performed.

Providing a computing system with real-time capabilities

A method, system and program are provided for determining if a system clock has been reset backwards in time by using a randomly generated set of bytes (such as a randomly generated or type 4 UUID) as a time epoch. By generating a time epoch at boot time and whenever the system clock is set back in time, an application can compare the time epoch value at an earlier point in its execution, with the current time epoch. If the time epoch values are different, the application will know that the system clock has been set back in time.

Use of a UUID as a time epoch to determine if the system clock has been reset backwards in time

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Theodore Y Tso