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2007-11-27 Joel Sherrill <joel.sherrill@OARcorp.com>

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* configure.ac, score/inline/rtems/score/thread.inl,
	score/src/threaddispatch.c: Add ability for user to disable inlining
	of _Thread_Enable_dispatch. This can save code space but more
	importantly it means the binary generated does not have code inlined
	that is difficult to test and very seldom executed.
This commit is contained in:
Joel Sherrill
2007-11-27 20:51:18 +00:00
parent 248e29af68
commit 5603b5a6e9
4 changed files with 45 additions and 14 deletions
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8
cpukit/ChangeLog
View File

@@ -1,3 +1,11 @@
2007-11-27 Joel Sherrill <joel.sherrill@OARcorp.com>
* configure.ac, score/inline/rtems/score/thread.inl,
score/src/threaddispatch.c: Add ability for user to disable inlining
of _Thread_Enable_dispatch. This can save code space but more
importantly it means the binary generated does not have code inlined
that is difficult to test and very seldom executed.
2007-11-27 Glenn Humphrey <glenn.humphrey@OARcorp.com>
* posix/src/prwlocktimedrdlock.c, posix/src/prwlocktimedwrlock.c,

6
cpukit/configure.ac
View File

@@ -224,6 +224,12 @@ RTEMS_CPUOPT([__RTEMS_USE_TICKS_RATE_MONOTONIC_STATISTICS__],
[disable nanosecond granularity for period statistics]
)
RTEMS_CPUOPT([__RTEMS_DO_NOT_INLINE_THREAD_ENABLE_DISPATCH__],
[test x"${RTEMS_DO_NOT_INLINE_THREAD_ENABLE_DISPATCH}" = x"1"],
[1],
[disable inlining _Thread_Enable_dispatch]
)
RTEMS_CPUOPT([__RTEMS_MAJOR__],
[true],
[$rtems_major],

9
cpukit/score/inline/rtems/score/thread.inl
View File

@@ -189,7 +189,11 @@ RTEMS_INLINE_ROUTINE void _Thread_Disable_dispatch( void )
* processor will be transferred to the heir thread.
*/
#if ( CPU_INLINE_ENABLE_DISPATCH == TRUE )
#if ( (CPU_INLINE_ENABLE_DISPATCH == FALSE) || \
(__RTEMS_DO_NOT_INLINE_THREAD_ENABLE_DISPATCH__ == 1) )
void _Thread_Enable_dispatch( void );
#else
/* inlining of enable dispatching must be true */
RTEMS_INLINE_ROUTINE void _Thread_Enable_dispatch()
{
RTEMS_COMPILER_MEMORY_BARRIER();
@@ -198,9 +202,6 @@ RTEMS_INLINE_ROUTINE void _Thread_Enable_dispatch()
}
#endif
#if ( CPU_INLINE_ENABLE_DISPATCH == FALSE )
void _Thread_Enable_dispatch( void );
#endif
/**
* This routine allows dispatching to occur again. However,

36
cpukit/score/src/threaddispatch.c
View File

@@ -31,10 +31,35 @@
#include <rtems/score/wkspace.h>
#ifdef RTEMS_ENABLE_NANOSECOND_CPU_USAGE_STATISTICS
#include <rtems/score/timespec.h>
#endif
/*PAGE
*
* _Thread_Enable_dispatch
*
* This kernel routine exits a context switch disable critical section.
* This is the NOT INLINED version.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* INTERRUPT LATENCY:
* dispatch thread
* no dispatch thread
*/
#if ( (CPU_INLINE_ENABLE_DISPATCH == FALSE) || \
(__RTEMS_DO_NOT_INLINE_THREAD_ENABLE_DISPATCH__ == 1) )
void _Thread_Enable_dispatch( void )
{
if ( --_Thread_Dispatch_disable_level )
return;
_Thread_Dispatch();
}
#endif
/*PAGE
*
* _Thread_Dispatch
@@ -55,15 +80,6 @@
* no dispatch thread
*/
#if ( CPU_INLINE_ENABLE_DISPATCH == FALSE )
void _Thread_Enable_dispatch( void )
{
if ( --_Thread_Dispatch_disable_level )
return;
_Thread_Dispatch();
}
#endif
void _Thread_Dispatch( void )
{
Thread_Control *executing;