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Enhance core mask validation and task yielding logic in vTaskSetSchedulerCoreMask

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Kuoping Hsu 2026-05-19 23:32:20 +08:00
parent 54c3e971da
commit 0d77e4755b
1 changed files with 23 additions and 2 deletions
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25
tasks.c
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@ -3140,9 +3140,15 @@ static void prvInitialiseNewTask( TaskFunction_t pxTaskCode,
BaseType_t xCoreID;
UBaseType_t uxOldMask;
UBaseType_t uxDisabledCores;
UBaseType_t uxEnabledCores;
traceENTER_vTaskSetSchedulerCoreMask( uxCoreMask );
/* Verify that uxCoreMask does not reference cores beyond the number of
* physical cores available. Any bit at position configNUMBER_OF_CORES
* or higher is invalid. */
configASSERT( ( uxCoreMask & ~( ( UBaseType_t ) ( ~( UBaseType_t ) 0U ) >> ( ( sizeof( UBaseType_t ) * ( size_t ) 8U ) - ( size_t ) configNUMBER_OF_CORES ) ) ) == 0U );
taskENTER_CRITICAL();
{
uxOldMask = uxSchedulerCoreMask;
@ -3158,18 +3164,33 @@ static void prvInitialiseNewTask( TaskFunction_t pxTaskCode,
{
/* For each core that was just disabled (was allowed, now disallowed),
* yield it immediately if it is running a non-idle task so the
* scheduler re-selects the idle task on that core. */
* scheduler re-selects the idle task on that core. For each core
* that was just enabled (was disallowed, now allowed), request a
* context switch immediately so it stops idling and promptly starts
* executing any available ready tasks. The two masks are mutually
* exclusive so a single loop suffices. */
uxDisabledCores = uxOldMask & ~uxSchedulerCoreMask;
uxEnabledCores = ~uxOldMask & uxSchedulerCoreMask;
for( xCoreID = ( BaseType_t ) 0; xCoreID < ( BaseType_t ) configNUMBER_OF_CORES; xCoreID++ )
{
if( ( uxDisabledCores & ( ( UBaseType_t ) 1U << ( UBaseType_t ) xCoreID ) ) != 0U )
UBaseType_t uxCoreBit = ( UBaseType_t ) 1U << ( UBaseType_t ) xCoreID;
if( ( uxDisabledCores & uxCoreBit ) != 0U )
{
if( ( pxCurrentTCBs[ xCoreID ]->uxTaskAttributes & taskATTRIBUTE_IS_IDLE ) == 0U )
{
prvYieldCore( xCoreID );
}
}
else if( ( uxEnabledCores & uxCoreBit ) != 0U )
{
prvYieldCore( xCoreID );
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
}
}