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Calculating Interrupt latency on iMX6Q Sabre-sd board

Question asked by ajmalali on Feb 16, 2017
Latest reply on Feb 16, 2017 by igorpadykov

Hi,

 

Can anyone please tell me how to find the interrupt latency on my imx6q board using software methods? I am using C baremetal programming. My initial plan was to manually generate an interrupt(EPIT) and measure the time between the moment the control enters the general irq handler and the the moment just before the user interrupt handler for that particular interrupt is called. Since i can not use any other interrupt during this process, i am confused how to measure the time. Can EPIT be used as a counter? If yes, then what might be the interval between each count?  Please help

Can any one at least provide some pointers regarding this matter.

 

Regards,

Ajmal

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