AVR32 CPU Usage

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bmathankumar
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Posted by bmathankumar: Mon. Aug 1, 2011 - 10:37 AM
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Can anybody tell me how to find the cpu usage of AVR32 Part UC3A0512?

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AVR Microcontrollers, AVR UC3
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digitalDan
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Posted by digitalDan: Mon. Aug 1, 2011 - 10:43 AM
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AFAIK there are no utilities that are ready made to do this. You will have to write code yourself to measure the performance.

Letting the smoke out since 1978

 

 

 

 

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bmathankumar
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Posted by bmathankumar: Mon. Aug 1, 2011 - 11:03 AM
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Can you help how to do this by code? For a FREERTOS application?

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bmathankumar
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Posted by bmathankumar: Mon. Aug 1, 2011 - 11:26 AM
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Can we use configUSE_IDLE_HOOK ?

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danicampora
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Posted by danicampora: Mon. Aug 1, 2011 - 11:56 AM
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The freeRTOS manual suggests that the idle hook could be used to measure the amount of cpu spare time. So the answer is YES.

Daniel Campora http://www.wipy.io

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bmathankumar
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Posted by bmathankumar: Mon. Aug 1, 2011 - 12:48 PM
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Is this make sense? Please let me know

UINT32 Tick_Hook_Cnt = 0;
UINT32 Idle_Hook_Cnt = 0;

void vApplicationTickHook(void){
Tick_Hook_Cnt++;
}

void vApplicationIdleHook(void){
Idle_Hook_Cnt++;
}

int cpu_utilization_percentage()
{
return (100 - Idle_Hook_Cnt * 100/Tick_Hook_Cnt);
}

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hce
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Posted by hce: Mon. Aug 1, 2011 - 05:05 PM
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Set an output pin high when idle, and low when doing something?

Hans-Christian

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