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If tickless idle mode is in use then ensure prvResetNextTaskUnblockTime() is called after a task is unblocked due to a bit being set in an event group. This allows the MCU to re-enter sleep mode at the earliest possible time (rather than waiting until the timeout that would occur had the task not being unblocked be the event group) and matches a similar change made for queues and derivative objects (semaphores, etc.) some time ago.

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This commit is contained in:
Richard Barry 2020-01-03 22:50:31 +00:00
parent 853856e8cc
commit 881958514b
1 changed files with 16 additions and 0 deletions
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16
FreeRTOS/Source/tasks.c
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@ -3317,6 +3317,20 @@ TCB_t *pxUnblockedTCB;
configASSERT( pxUnblockedTCB );
( void ) uxListRemove( pxEventListItem );
#if( configUSE_TICKLESS_IDLE != 0 )
{
/* If a task is blocked on a kernel object then xNextTaskUnblockTime
might be set to the blocked task's time out time. If the task is
unblocked for a reason other than a timeout xNextTaskUnblockTime is
normally left unchanged, because it is automatically reset to a new
value when the tick count equals xNextTaskUnblockTime. However if
tickless idling is used it might be more important to enter sleep mode
at the earliest possible time - so reset xNextTaskUnblockTime here to
ensure it is updated at the earliest possible time. */
prvResetNextTaskUnblockTime();
}
#endif
/* Remove the task from the delayed list and add it to the ready list. The
scheduler is suspended so interrupts will not be accessing the ready
lists. */
@ -3597,6 +3611,8 @@ static portTASK_FUNCTION( prvIdleTask, pvParameters )
const UBaseType_t uxNonApplicationTasks = 1;
eSleepModeStatus eReturn = eStandardSleep;
/* This function must be called from a critical section. */
if( listCURRENT_LIST_LENGTH( &xPendingReadyList ) != 0 )
{
/* A task was made ready while the scheduler was suspended. */