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Yield for task when core affinity of a ready task is changed (#1123)

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* The SMP scheduler should re-select a core to yield when the core
  affinity of a ready task is changed.
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chinglee-iot 2024-08-20 12:34:01 +08:00 committed by GitHub
parent 2faa8bc154
commit e43553af1e
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1 changed files with 8 additions and 17 deletions
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25
tasks.c
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@ -2982,11 +2982,6 @@ static void prvInitialiseNewTask( TaskFunction_t pxTaskCode,
{
TCB_t * pxTCB;
BaseType_t xCoreID;
UBaseType_t uxPrevCoreAffinityMask;
#if ( configUSE_PREEMPTION == 1 )
UBaseType_t uxPrevNotAllowedCores;
#endif
traceENTER_vTaskCoreAffinitySet( xTask, uxCoreAffinityMask );
@ -2994,7 +2989,6 @@ static void prvInitialiseNewTask( TaskFunction_t pxTaskCode,
{
pxTCB = prvGetTCBFromHandle( xTask );
uxPrevCoreAffinityMask = pxTCB->uxCoreAffinityMask;
pxTCB->uxCoreAffinityMask = uxCoreAffinityMask;
if( xSchedulerRunning != pdFALSE )
@ -3014,17 +3008,14 @@ static void prvInitialiseNewTask( TaskFunction_t pxTaskCode,
{
#if ( configUSE_PREEMPTION == 1 )
{
/* Calculate the cores on which this task was not allowed to
* run previously. */
uxPrevNotAllowedCores = ( ~uxPrevCoreAffinityMask ) & ( ( 1U << configNUMBER_OF_CORES ) - 1U );
/* Does the new core mask enables this task to run on any of the
* previously not allowed cores? If yes, check if this task can be
* scheduled on any of those cores. */
if( ( uxPrevNotAllowedCores & uxCoreAffinityMask ) != 0U )
{
prvYieldForTask( pxTCB );
}
/* The SMP scheduler requests a core to yield when a ready
* task is able to run. It is possible that the core affinity
* of the ready task is changed before the requested core
* can select it to run. In that case, the task may not be
* selected by the previously requested core due to core affinity
* constraint and the SMP scheduler must select a new core to
* yield for the task. */
prvYieldForTask( xTask );
}
#else /* #if( configUSE_PREEMPTION == 1 ) */
{