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Merge branch 'bugfix/freertos_idle_tick_count' into 'master'

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freertos: use xTaskQueueMutex to protect tick count

See merge request idf/esp-idf!3478
This commit is contained in:
Ivan Grokhotkov 2018-11-06 12:14:51 +08:00
commit 35d1c7b173
1 changed files with 12 additions and 42 deletions
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54
components/freertos/tasks.c
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@ -302,10 +302,8 @@ when the scheduler is unsuspended. The pending ready list itself can only be
accessed from a critical section. */
PRIVILEGED_DATA static volatile UBaseType_t uxSchedulerSuspended[ portNUM_PROCESSORS ] = { ( UBaseType_t ) pdFALSE };
/* For now, we use just one mux for all the critical sections. ToDo: give everything a bit more granularity;
that could improve performance by not needlessly spinning in spinlocks for unrelated resources. */
/* We use just one spinlock for all the critical sections. */
PRIVILEGED_DATA static portMUX_TYPE xTaskQueueMutex = portMUX_INITIALIZER_UNLOCKED;
PRIVILEGED_DATA static portMUX_TYPE xTickCountMutex = portMUX_INITIALIZER_UNLOCKED;
#if ( configGENERATE_RUN_TIME_STATS == 1 )
@ -1346,9 +1344,7 @@ static void prvAddNewTaskToReadyList( TCB_t *pxNewTCB, TaskFunction_t pxTaskCode
{
/* Minor optimisation. The tick count cannot change in this
block. */
// portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
const TickType_t xConstTickCount = xTickCount;
// portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
/* Generate the tick time at which the task wants to wake. */
xTimeToWake = *pxPreviousWakeTime + xTimeIncrement;
@ -1455,9 +1451,7 @@ static void prvAddNewTaskToReadyList( TCB_t *pxNewTCB, TaskFunction_t pxTaskCode
/* Calculate the time to wake - this may overflow but this is
not a problem. */
// portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
xTimeToWake = xTickCount + xTicksToDelay;
// portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
/* We must remove ourselves from the ready list before adding
ourselves to the blocked list as the same list item is used for
@ -2200,9 +2194,7 @@ void vTaskSuspendAll( void )
}
else
{
portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
xReturn = xNextTaskUnblockTime - xTickCount;
portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
}
taskEXIT_CRITICAL(&xTaskQueueMutex);
@ -2308,31 +2300,13 @@ BaseType_t xAlreadyYielded = pdFALSE;
TickType_t xTaskGetTickCount( void )
{
TickType_t xTicks;
/* Critical section required if running on a 16 bit processor. */
portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
{
xTicks = xTickCount;
}
portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
return xTicks;
return xTickCount;
}
/*-----------------------------------------------------------*/
TickType_t xTaskGetTickCountFromISR( void )
{
TickType_t xReturn;
taskENTER_CRITICAL_ISR(&xTickCountMutex);
{
xReturn = xTickCount;
// vPortCPUReleaseMutex( &xTickCountMutex );
}
taskEXIT_CRITICAL_ISR(&xTickCountMutex);
return xReturn;
return xTickCount;
}
/*-----------------------------------------------------------*/
@ -2467,10 +2441,10 @@ implementations require configUSE_TICKLESS_IDLE to be set to a value other than
/* Correct the tick count value after a period during which the tick
was suppressed. Note this does *not* call the tick hook function for
each stepped tick. */
portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
portENTER_CRITICAL( &xTaskQueueMutex );
configASSERT( ( xTickCount + xTicksToJump ) <= xNextTaskUnblockTime );
xTickCount += xTicksToJump;
portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
portEXIT_CRITICAL( &xTaskQueueMutex );
traceINCREASE_TICK_COUNT( xTicksToJump );
}
@ -2512,14 +2486,10 @@ BaseType_t xSwitchRequired = pdFALSE;
if( uxSchedulerSuspended[ xPortGetCoreID() ] == ( UBaseType_t ) pdFALSE )
{
portTICK_TYPE_ENTER_CRITICAL( &xTickCountMutex );
taskENTER_CRITICAL_ISR( &xTaskQueueMutex );
/* Increment the RTOS tick, switching the delayed and overflowed
delayed lists if it wraps to 0. */
++xTickCount;
portTICK_TYPE_EXIT_CRITICAL( &xTickCountMutex );
//The other CPU may decide to mess with the task queues, so this needs a mux.
taskENTER_CRITICAL_ISR(&xTaskQueueMutex);
{
/* Minor optimisation. The tick count cannot change in this
block. */
@ -3288,7 +3258,7 @@ BaseType_t xReturn;
configASSERT( pxTimeOut );
configASSERT( pxTicksToWait );
taskENTER_CRITICAL(&xTickCountMutex);
taskENTER_CRITICAL(&xTaskQueueMutex);
{
/* Minor optimisation. The tick count cannot change in this block. */
const TickType_t xConstTickCount = xTickCount;
@ -3324,7 +3294,7 @@ BaseType_t xReturn;
xReturn = pdTRUE;
}
}
taskEXIT_CRITICAL(&xTickCountMutex);
taskEXIT_CRITICAL(&xTaskQueueMutex);
return xReturn;
}
@ -4081,7 +4051,7 @@ TCB_t *pxTCB;
{
TCB_t * const pxTCB = ( TCB_t * ) pxMutexHolder;
taskENTER_CRITICAL(&xTickCountMutex);
taskENTER_CRITICAL(&xTaskQueueMutex);
/* If the mutex was given back by an interrupt while the queue was
locked then the mutex holder might now be NULL. */
if( pxMutexHolder != NULL )
@ -4138,7 +4108,7 @@ TCB_t *pxTCB;
mtCOVERAGE_TEST_MARKER();
}
taskEXIT_CRITICAL(&xTickCountMutex);
taskEXIT_CRITICAL(&xTaskQueueMutex);
}
@ -4151,7 +4121,7 @@ TCB_t *pxTCB;
{
TCB_t * const pxTCB = ( TCB_t * ) pxMutexHolder;
BaseType_t xReturn = pdFALSE;
taskENTER_CRITICAL(&xTickCountMutex);
taskENTER_CRITICAL(&xTaskQueueMutex);
if( pxMutexHolder != NULL )
{
@ -4215,7 +4185,7 @@ TCB_t *pxTCB;
mtCOVERAGE_TEST_MARKER();
}
taskEXIT_CRITICAL(&xTickCountMutex);
taskEXIT_CRITICAL(&xTaskQueueMutex);
return xReturn;
}