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feat(freertos-smp): Optimize prvLockQueue() and prvUnlockQueue()

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This commit is contained in:
Sudeep Mohanty 2025-08-22 17:01:29 +02:00
parent 1585b157d5
commit 5098b1ae26
1 changed files with 52 additions and 5 deletions
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57
queue.c
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@ -287,8 +287,34 @@ static void prvInitialiseNewQueue( const UBaseType_t uxQueueLength,
/*
* Macro to mark a queue as locked. Locking a queue prevents an ISR from
* accessing the queue event lists.
*
* Under granular locks, queueLOCK()/queueUNLOCK() already surround this with
* task-level spinlock + preemption-disabled region. To avoid redundant
* data-group enter/exit (which would re-disable preemption and re-acquire the
* same task spinlock), we minimize to interrupt masking only for the small
* metadata updates here. For the non-granular path, retain the full
* queueENTER_CRITICAL/queueEXIT_CRITICAL.
*/
#define prvLockQueue( pxQueue ) \
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
#define prvLockQueue( pxQueue ) \
do { \
UBaseType_t ulState = portSET_INTERRUPT_MASK(); \
portGET_SPINLOCK( portGET_CORE_ID(), ( portSPINLOCK_TYPE * ) &( ( pxQueue )->xISRSpinlock ) ); \
{ \
if( ( pxQueue )->cRxLock == queueUNLOCKED ) \
{ \
( pxQueue )->cRxLock = queueLOCKED_UNMODIFIED; \
} \
if( ( pxQueue )->cTxLock == queueUNLOCKED ) \
{ \
( pxQueue )->cTxLock = queueLOCKED_UNMODIFIED; \
} \
} \
portRELEASE_SPINLOCK( portGET_CORE_ID(), ( portSPINLOCK_TYPE * ) &( ( pxQueue )->xISRSpinlock ) ); \
portCLEAR_INTERRUPT_MASK( ulState ); \
} while( 0 )
#else /* if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) ) */
#define prvLockQueue( pxQueue ) \
queueENTER_CRITICAL( pxQueue ); \
{ \
if( ( pxQueue )->cRxLock == queueUNLOCKED ) \
@ -301,6 +327,7 @@ static void prvInitialiseNewQueue( const UBaseType_t uxQueueLength,
} \
} \
queueEXIT_CRITICAL( pxQueue )
#endif /* if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) ) */
/*
* Macro to increment cTxLock member of the queue data structure. It is
@ -2538,7 +2565,12 @@ static void prvUnlockQueue( Queue_t * const pxQueue )
* removed from the queue while the queue was locked. When a queue is
* locked items can be added or removed, but the event lists cannot be
* updated. */
queueENTER_CRITICAL( pxQueue );
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
UBaseType_t ulState = portSET_INTERRUPT_MASK();
portGET_SPINLOCK( portGET_CORE_ID(), ( portSPINLOCK_TYPE * ) &( pxQueue->xISRSpinlock ) );
#else
queueENTER_CRITICAL( pxQueue );
#endif
{
int8_t cTxLock = pxQueue->cTxLock;
@ -2616,10 +2648,20 @@ static void prvUnlockQueue( Queue_t * const pxQueue )
pxQueue->cTxLock = queueUNLOCKED;
}
queueEXIT_CRITICAL( pxQueue );
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
portRELEASE_SPINLOCK( portGET_CORE_ID(), ( portSPINLOCK_TYPE * ) &( pxQueue->xISRSpinlock ) );
portCLEAR_INTERRUPT_MASK( ulState );
#else
queueEXIT_CRITICAL( pxQueue );
#endif
/* Do the same for the Rx lock. */
queueENTER_CRITICAL( pxQueue );
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
ulState = portSET_INTERRUPT_MASK();
portGET_SPINLOCK( portGET_CORE_ID(), ( portSPINLOCK_TYPE * ) &( pxQueue->xISRSpinlock ) );
#else
queueENTER_CRITICAL( pxQueue );
#endif
{
int8_t cRxLock = pxQueue->cRxLock;
@ -2646,7 +2688,12 @@ static void prvUnlockQueue( Queue_t * const pxQueue )
pxQueue->cRxLock = queueUNLOCKED;
}
queueEXIT_CRITICAL( pxQueue );
#if ( ( portUSING_GRANULAR_LOCKS == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
portRELEASE_SPINLOCK( portGET_CORE_ID(), ( portSPINLOCK_TYPE * ) &( pxQueue->xISRSpinlock ) );
portCLEAR_INTERRUPT_MASK( ulState );
#else
queueEXIT_CRITICAL( pxQueue );
#endif
}
/*-----------------------------------------------------------*/