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[kernel][schedule] reduce unnecessary schedule by comparing new ready thread's priority and current #5959

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[kernel][schedule] reduce unnecessary schedule by comparing new ready thread's priority and current #5959

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2f798e1
modify rt_thread_resume for necessary schedule judgment
blta May 17, 2022
5dd2362
call new _ipc_list_resume for necessary schedule
blta May 17, 2022
888f75e
judge return value of rt_thread_resume in some kernel srcs
blta May 17, 2022
6cccf8c
judge return value of rt_thread_resume in components srcs
blta May 17, 2022
7b4b253
fix a assignmet error
blta May 17, 2022
4db5774
distinguish SMP mode
blta May 17, 2022
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distinguish SMP mode
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@blta
blta committed May 17, 2022
commit 4db5774326ee34a6568abdc2a2ed0650728d585e
4 changes: 4 additions & 0 deletions src/thread.c
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Original file line number Diff line number Diff line change
Expand Up @@ -884,7 +884,9 @@ rt_err_t rt_thread_resume(rt_thread_t thread)
{
rt_base_t level;
rt_err_t result = RT_EOK;
#ifndef RT_USING_SMP
extern rt_uint8_t rt_current_priority;
#endif
/* parameter check */
RT_ASSERT(thread != RT_NULL);
RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
Expand All @@ -910,6 +912,7 @@ rt_err_t rt_thread_resume(rt_thread_t thread)
/* insert to schedule ready list */
rt_schedule_insert_thread(thread);

#ifndef RT_USING_SMP
/* compare the priority with rt_current_priority*/
if(thread->current_priority < rt_current_priority)
{
Expand All @@ -919,6 +922,7 @@ rt_err_t rt_thread_resume(rt_thread_t thread)
{
result = RT_EBUSY;
}
#endif

/* enable interrupt */
rt_hw_interrupt_enable(level);
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