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Re-implement the LPC18xx and SmartFusion2 run time stats implementation to use the free running Cortex-M cycle counter in place of the systick.

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Correct the run-time stats counter implementation in the RZ demo.
Guard against run time counters going backwards in tasks.c.
This commit is contained in:
Richard Barry 2013-06-25 10:44:44 +00:00
parent cdae14a8cb
commit 87049ac37c
4 changed files with 103 additions and 83 deletions
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17
FreeRTOS/Source/tasks.c
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@ -1843,12 +1843,17 @@ void vTaskSwitchContext( void )
ulTotalRunTime = portGET_RUN_TIME_COUNTER_VALUE();
#endif
/* Add the amount of time the task has been running to the accumulated
time so far. The time the task started running was stored in
ulTaskSwitchedInTime. Note that there is no overflow protection here
so count values are only valid until the timer overflows. Generally
this will be about 1 hour assuming a 1uS timer increment. */
pxCurrentTCB->ulRunTimeCounter += ( ulTotalRunTime - ulTaskSwitchedInTime );
/* Add the amount of time the task has been running to the
accumulated time so far. The time the task started running was
stored in ulTaskSwitchedInTime. Note that there is no overflow
protection here so count values are only valid until the timer
overflows. The guard against negative values is to protect
against suspect run time stat counter implementations - which
are provided by the application, not the kernel. */
if( ulTotalRunTime > ulTaskSwitchedInTime )
{
pxCurrentTCB->ulRunTimeCounter += ( ulTotalRunTime - ulTaskSwitchedInTime );
}
ulTaskSwitchedInTime = ulTotalRunTime;
}
#endif /* configGENERATE_RUN_TIME_STATS */