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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-11-09 16:21:37 +0100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-11-20 08:36:49 +0100 |
commit | c597fb166e05d315ce5da29c0a43a09992772dad (patch) | |
tree | 627d3f248020e0a292fe7dcb2505cf4d90957ae7 /cpukit/score/src/schedulerpriority.c | |
parent | bsps/powerpc: Fix PPC_EXC_CONFIG_USE_FIXED_HANDLER (diff) | |
download | rtems-c597fb166e05d315ce5da29c0a43a09992772dad.tar.bz2 |
score: Optimize scheduler priority updates
Thread priority changes may append or prepend the thread to its priority
group on the scheduler ready queue. Previously, a separate priority
value and a prepend-it flag in the scheduler node were used to propagate
a priority change to the scheduler.
Now, use an append-it bit in the priority control and reduce the plain
priority value to 63 bits.
This change leads to a significant code size reduction (about 25%) of
the SMP schedulers. The negligible increase of the standard priority
scheduler is due to some additional shift operations
(SCHEDULER_PRIORITY_MAP() and SCHEDULER_PRIORITY_UNMAP()).
Before:
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136 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimpleblock.o
464 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimplechangepriority.o
24 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimple.o
108 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimpleschedule.o
292 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimpleunblock.o
264 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimpleyield.o
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280 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriorityblock.o
488 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerprioritychangepriority.o
200 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriority.o
164 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriorityschedule.o
328 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriorityunblock.o
200 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriorityyield.o
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24112 arm-rtems5/c/imx7/cpukit/score/src/libscore_a-scheduleredfsmp.o
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37204 sparc-rtems5/c/gr740/cpukit/score/src/libscore_a-scheduleredfsmp.o
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42236 powerpc-rtems5/c/qoriq_e6500_32/cpukit/score/src/libscore_a-scheduleredfsmp.o
After:
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136 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimpleblock.o
272 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimplechangepriority.o
24 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimple.o
108 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimpleschedule.o
292 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimpleunblock.o
264 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulersimpleyield.o
text filename
280 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriorityblock.o
488 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerprioritychangepriority.o
208 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriority.o
164 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriorityschedule.o
332 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriorityunblock.o
200 sparc-rtems5/c/erc32/cpukit/score/src/libscore_a-schedulerpriorityyield.o
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18860 arm-rtems5/c/imx7/cpukit/score/src/libscore_a-scheduleredfsmp.o
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28520 sparc-rtems5/c/gr740/cpukit/score/src/libscore_a-scheduleredfsmp.o
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32664 powerpc-rtems5/c/qoriq_e6500_32/cpukit/score/src/libscore_a-scheduleredfsmp.o
Diffstat (limited to 'cpukit/score/src/schedulerpriority.c')
-rw-r--r-- | cpukit/score/src/schedulerpriority.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/cpukit/score/src/schedulerpriority.c b/cpukit/score/src/schedulerpriority.c index ddfd973e0a..5ac16a49a1 100644 --- a/cpukit/score/src/schedulerpriority.c +++ b/cpukit/score/src/schedulerpriority.c @@ -19,7 +19,6 @@ #endif #include <rtems/score/schedulerpriorityimpl.h> -#include <rtems/score/wkspace.h> void _Scheduler_priority_Initialize( const Scheduler_Control *scheduler ) { @@ -49,7 +48,7 @@ void _Scheduler_priority_Node_initialize( the_node = _Scheduler_priority_Node_downcast( node ); _Scheduler_priority_Ready_queue_update( &the_node->Ready_queue, - priority, + SCHEDULER_PRIORITY_UNMAP( priority ), &context->Bit_map, &context->Ready[ 0 ] ); |