Times not accurate in Systemview

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    • Times not accurate in Systemview

      Hi,

      I am profiling an algorithm on an NRF52840. As the algorithm use more memory, it takes more time. On larger timescales where the algorithm might take 90seconds to compute, the in/out time from system view says 18 ish seconds. As of now Im using noOS, 64Mhz and systick is not enabled. Is there anything that might be causing this (timer overflow somewhere)?

      Calling

      SEGGER_SYSVIEW_Conf();
      SEGGER_SYSVIEW_OnIdle();

      in the main and then
      SYS_TRIGGER(SYS_SENSOR_NOISE_MODEL);
      SYS_RELEASE(SYS_SENSOR_NOISE_MODEL);

      as my entry and exit points for the algorithm.
    • Hello,

      Thank you for your inquiry.
      It sounds like the timestamp generation is not set up correctly for your setup.
      The timestamps will only be as accurate as the timestamp source you use.
      Did you follow the following guide when setting up your NoOS setup?
      wiki.segger.com/Use_SystemView_without_RTOS
      Is your application properly instrumented?

      Best regards,
      Nino
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