RTEMS Porting Guide
Should the calls to _Thread_Enable_dispatch be inlined?
If TRUE, then they are inlined.
If FALSE, then a subroutine call is made.
Basically this is an example of the classic trade-off of size versus speed. Inlining the call (TRUE) typically increases the size of RTEMS while speeding up the enabling of dispatching.
[NOTE: In general, the _Thread_Dispatch_disable_level will only be 0 or 1 unless you are in an interrupt handler and that interrupt handler invokes the executive.] When not inlined something calls _Thread_Enable_dispatch which in turns calls _Thread_Dispatch. If the enable dispatch is inlined, then one subroutine call is avoided entirely.]
#define CPU_INLINE_ENABLE_DISPATCH FALSE
RTEMS Porting Guide
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