Optimization

AN3423

8/13

Doc ID 018987 Rev 2

The configuration contains no category 2 ISRs. Some functions related to ISRs can be

omitted.

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OS_EXCLUDE_CPULOAD

The CPU load monitoring feature is omitted.

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OS_EXCLUDE_ERROR_ACTION

No special error action is taken. Errors always result in an error code being returned to the

caller.

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OS_EXCLUDE_ERRORHANDLING

The complete error handling code is omitted. Error codes are returned to the caller. No hook

functions are called.

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OS_EXCLUDE_ERRORHANDLINGFORVOIDAPI

Error handling for APIs does not return, an error code is omitted (it is the default).

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OS_EXCLUDE_ERRORHOOK

The code that calls the error hook is omitted.

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OS_EXCLUDE_ERRORHOOK_APP

The code that calls the application's error hook (including processor mode switch) is

omitted.

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OS_EXCLUDE_EVENTS

All functions related to Events (WaitEvent, SetEvent, etc.) are omitted. A few other

optimizations in ActivateTask are also possible.

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OS_EXCLUDE_EXCEPTIONS

The standard exception handling is omitted. In its place there is a call to an userprovided

function.

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OS_EXCLUDE_EXTENDED

All error checking that takes place in EXTENDED status is omitted.

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OS_EXCLUDE_EXTRA_CHECK

All code related to “extra runtime checks” is omitted.

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OS_EXCLUDE_HWCOUNTER

All the functionality for hardware counters (initialisation, starting and stopping during alarm

processing) is omitted.

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OS_EXCLUDE_HW_FP

Architecture-dependent: floating-point context switching is omitted.

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OS_EXCLUDE_INTSENABLEDCHECK

The check that interrupts are enabled, that AUTOSAR requires in almost all API functions, is

omitted.

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OS_EXCLUDE_KILLABLE_APPEHOOK

Error hooks belonging to applications are called directly without saving context. This means

that they run as trusted code and cannot be killed.

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OS_EXCLUDE_KILLABLE_APPSHOOK