Merge branch 'bugfix/freertos_idle_tick_count_v3.1' into 'release/v3.1'
freertos: use xTaskQueueMutex to protect tick count (backport v3.1) See merge request idf/esp-idf!3728
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commit
f00c6d1e84
1 changed files with 12 additions and 42 deletions
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@ -302,10 +302,8 @@ when the scheduler is unsuspended. The pending ready list itself can only be
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accessed from a critical section. */
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PRIVILEGED_DATA static volatile UBaseType_t uxSchedulerSuspended[ portNUM_PROCESSORS ] = { ( UBaseType_t ) pdFALSE };
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/* For now, we use just one mux for all the critical sections. ToDo: give everything a bit more granularity;
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that could improve performance by not needlessly spinning in spinlocks for unrelated resources. */
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/* We use just one spinlock for all the critical sections. */
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PRIVILEGED_DATA static portMUX_TYPE xTaskQueueMutex = portMUX_INITIALIZER_UNLOCKED;
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PRIVILEGED_DATA static portMUX_TYPE xTickCountMutex = portMUX_INITIALIZER_UNLOCKED;
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#if ( configGENERATE_RUN_TIME_STATS == 1 )
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@ -1347,9 +1345,7 @@ static void prvAddNewTaskToReadyList( TCB_t *pxNewTCB, TaskFunction_t pxTaskCode
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{
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/* Minor optimisation. The tick count cannot change in this
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block. */
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// portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
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const TickType_t xConstTickCount = xTickCount;
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// portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
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/* Generate the tick time at which the task wants to wake. */
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xTimeToWake = *pxPreviousWakeTime + xTimeIncrement;
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@ -1456,9 +1452,7 @@ static void prvAddNewTaskToReadyList( TCB_t *pxNewTCB, TaskFunction_t pxTaskCode
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/* Calculate the time to wake - this may overflow but this is
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not a problem. */
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// portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
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xTimeToWake = xTickCount + xTicksToDelay;
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// portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
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/* We must remove ourselves from the ready list before adding
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ourselves to the blocked list as the same list item is used for
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@ -2198,9 +2192,7 @@ void vTaskSuspendAll( void )
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}
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else
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{
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portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
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xReturn = xNextTaskUnblockTime - xTickCount;
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portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
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}
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taskEXIT_CRITICAL(&xTaskQueueMutex);
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@ -2306,31 +2298,13 @@ BaseType_t xAlreadyYielded = pdFALSE;
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TickType_t xTaskGetTickCount( void )
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{
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TickType_t xTicks;
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/* Critical section required if running on a 16 bit processor. */
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portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
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{
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xTicks = xTickCount;
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}
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portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
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return xTicks;
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return xTickCount;
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}
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/*-----------------------------------------------------------*/
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TickType_t xTaskGetTickCountFromISR( void )
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{
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TickType_t xReturn;
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taskENTER_CRITICAL_ISR(&xTickCountMutex);
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{
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xReturn = xTickCount;
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// vPortCPUReleaseMutex( &xTickCountMutex );
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}
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taskEXIT_CRITICAL_ISR(&xTickCountMutex);
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return xReturn;
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return xTickCount;
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}
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/*-----------------------------------------------------------*/
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@ -2465,10 +2439,10 @@ implementations require configUSE_TICKLESS_IDLE to be set to a value other than
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/* Correct the tick count value after a period during which the tick
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was suppressed. Note this does *not* call the tick hook function for
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each stepped tick. */
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portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
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portENTER_CRITICAL( &xTaskQueueMutex );
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configASSERT( ( xTickCount + xTicksToJump ) <= xNextTaskUnblockTime );
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xTickCount += xTicksToJump;
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portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
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portEXIT_CRITICAL( &xTaskQueueMutex );
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traceINCREASE_TICK_COUNT( xTicksToJump );
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}
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@ -2508,14 +2482,10 @@ BaseType_t xSwitchRequired = pdFALSE;
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if( uxSchedulerSuspended[ xPortGetCoreID() ] == ( UBaseType_t ) pdFALSE )
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{
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portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
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taskENTER_CRITICAL_ISR( &xTaskQueueMutex );
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/* Increment the RTOS tick, switching the delayed and overflowed
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delayed lists if it wraps to 0. */
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++xTickCount;
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portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
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//The other CPU may decide to mess with the task queues, so this needs a mux.
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taskENTER_CRITICAL_ISR(&xTaskQueueMutex);
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{
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/* Minor optimisation. The tick count cannot change in this
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block. */
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@ -3280,7 +3250,7 @@ BaseType_t xReturn;
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configASSERT( pxTimeOut );
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configASSERT( pxTicksToWait );
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taskENTER_CRITICAL(&xTickCountMutex);
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taskENTER_CRITICAL(&xTaskQueueMutex);
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{
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/* Minor optimisation. The tick count cannot change in this block. */
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const TickType_t xConstTickCount = xTickCount;
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@ -3316,7 +3286,7 @@ BaseType_t xReturn;
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xReturn = pdTRUE;
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}
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}
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taskEXIT_CRITICAL(&xTickCountMutex);
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taskEXIT_CRITICAL(&xTaskQueueMutex);
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return xReturn;
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}
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@ -4077,7 +4047,7 @@ TCB_t *pxTCB;
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{
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TCB_t * const pxTCB = ( TCB_t * ) pxMutexHolder;
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taskENTER_CRITICAL(&xTickCountMutex);
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taskENTER_CRITICAL(&xTaskQueueMutex);
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/* If the mutex was given back by an interrupt while the queue was
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locked then the mutex holder might now be NULL. */
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if( pxMutexHolder != NULL )
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@ -4134,7 +4104,7 @@ TCB_t *pxTCB;
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mtCOVERAGE_TEST_MARKER();
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}
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taskEXIT_CRITICAL(&xTickCountMutex);
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taskEXIT_CRITICAL(&xTaskQueueMutex);
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}
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@ -4147,7 +4117,7 @@ TCB_t *pxTCB;
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{
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TCB_t * const pxTCB = ( TCB_t * ) pxMutexHolder;
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BaseType_t xReturn = pdFALSE;
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taskENTER_CRITICAL(&xTickCountMutex);
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taskENTER_CRITICAL(&xTaskQueueMutex);
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if( pxMutexHolder != NULL )
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{
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@ -4211,7 +4181,7 @@ TCB_t *pxTCB;
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mtCOVERAGE_TEST_MARKER();
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}
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taskEXIT_CRITICAL(&xTickCountMutex);
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taskEXIT_CRITICAL(&xTaskQueueMutex);
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return xReturn;
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}
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