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Add affinity to IDLE tasks in SMP systems #1415

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Add affinity to IDLE tasks in SMP systems #1415

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4 changes: 4 additions & 0 deletions include/FreeRTOS.h
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Original file line number Diff line number Diff line change
Expand Up @@ -377,6 +377,10 @@
#define configIDLE_SHOULD_YIELD 1
#endif

#ifndef configIDLE_AFFINITY
#define configIDLE_AFFINITY 0
#endif

#if configMAX_TASK_NAME_LEN < 1
#error configMAX_TASK_NAME_LEN must be set to a minimum of 1 in FreeRTOSConfig.h
#endif
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5 changes: 5 additions & 0 deletions tasks.c
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Expand Up @@ -3687,6 +3687,11 @@ static BaseType_t prvCreateIdleTasks( void )
/* Assign idle task to each core before SMP scheduler is running. */
xIdleTaskHandles[ xCoreID ]->xTaskRunState = xCoreID;
pxCurrentTCBs[ xCoreID ] = xIdleTaskHandles[ xCoreID ];
#if ( ( configIDLE_AFFINITY == 1 ) && ( configUSE_CORE_AFFINITY == 1 ) )
{
xIdleTaskHandles[ xCoreID ]->uxCoreAffinityMask = ( ( UBaseType_t ) 1U << ( UBaseType_t ) xCoreID );
}
#endif
}
#endif
}
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