I am running a little program on the TK1 which polls for a GPIO interrupt to start a data acquisition. For some reason there is a significant delay whenever i wait some seconds between two consecutive executions. I already maximized the performance (cpu governor, cpuqiet etc) but it seems to me that some sort of power saving is still active. The tegrastats output below shows “good” behavior in the first line and “bad” in the second line. It seems to me that the throttled external memory controller frequency has an impact on my delay. How can i force the EMC to run at full speed?
AM 446/1924MB (lfb 321x4MB) cpu [0%,0%,0%,0%]@2065 EMC 12%@102 AVP 0%@204 VDE 120 GR3D 0%@12 EDP limit 0 RAM 446/1924MB (lfb 321x4MB) cpu [3%,3%,3%,3%]@2065 EMC 1%@924 AVP 0%@204 VDE 120 GR3D 0%@12 EDP limit 0