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authorSebastian Huber <sebastian.huber@embedded-brains.de>2016-03-03 07:02:03 +0100
committerSebastian Huber <sebastian.huber@embedded-brains.de>2016-03-17 08:27:47 +0100
commitd37adfe5dd82cc3c933eb521b8f800c342af0e52 (patch)
tree5f4a77976b9ae35594d00b0bb58e18bb62a9b541 /cpukit/score/src/threaddispatch.c
parentbsp/realview_pbx_a9_qemu: Fix compiler flags (diff)
downloadrtems-d37adfe5dd82cc3c933eb521b8f800c342af0e52.tar.bz2
score: Fix CPU time used by executing threads
The CPU time used of a thread was previously maintained per-processor mostly during _Thread_Dispatch(). However, on SMP configurations the actual processor of a thread is difficult to figure out since thread dispatching is a highly asynchronous process (e.g. via inter-processor interrupts). Only the intended processor of a thread is known to the scheduler easily. Do the CPU usage accounting during thread heir updates in the context of the scheduler operations. Provide the function _Thread_Get_CPU_time_used() to get the CPU usage of a thread using proper locks to get a consistent value. Close #2627.
Diffstat (limited to 'cpukit/score/src/threaddispatch.c')
-rw-r--r--cpukit/score/src/threaddispatch.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/cpukit/score/src/threaddispatch.c b/cpukit/score/src/threaddispatch.c
index 1b36c93fbb..ce5d118a22 100644
--- a/cpukit/score/src/threaddispatch.c
+++ b/cpukit/score/src/threaddispatch.c
@@ -108,11 +108,6 @@ void _Thread_Do_dispatch( Per_CPU_Control *cpu_self, ISR_Level level )
_ISR_Enable( level );
#endif
- _Thread_Update_cpu_time_used(
- executing,
- &cpu_self->time_of_last_context_switch
- );
-
_User_extensions_Thread_switch( executing, heir );
_Thread_Save_fp( executing );
_Context_Switch( &executing->Registers, &heir->Registers );