RTEMS Intel i386 Applications Supplement
The RTEMS timing suite is written in C. The overhead of passing arguments to RTEMS by C is not timed. The times reported represent the amount of time from entering to exiting RTEMS.
The tests are based upon one of two execution models: (1) single invocation times, and (2) average times of repeated invocations. Single invocation times are provided for directives which cannot easily be invoked multiple times in the same scenario. For example, the times reported for entering and exiting an interrupt service routine are single invocation times. The second model is used for directives which can easily be invoked multiple times in the same scenario. For example, the times reported for semaphore obtain and semaphore release are averages of multiple invocations. At least 100 invocations are used to obtain the average.
RTEMS Intel i386 Applications Supplement
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