De : BRIARD Sebastien Envoyé : mardi 27 mars 2018 11:42 À : 'users@rtems.org' Objet : Interrupt latency in RTEMS (Zedboard)
Hi, I was trying to measure the interrupt latency in RTEMS with a Xilinx Zynq Zedboard (cortex A9). I modified the c file in classic_signal example to measure time in the main loop and right after entering the handler. That might seem artificial but well, it gives me a value with a relatively simple code. I used this code for 100, 10000, and one million ticks per second. I am trying to understand how the measure can quite equal with 100 ticks per second and a million. (I obtained values between 500ns and 1000ns). Is there another timer that is used for interrupt processing ? A subsequent question, is it possible to use a larger value than a tick per microsecond ? Maybe I am confusing a little between frequency and tick clock in RTEMS but I would like to run test with more or less a tick per nanosecond. Thank you, Sébastien.
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