Hi fiends, I have interrupt handler of the highest priority invoked every 10 ms at EA2468 target. Current time can be latched precisely from FPGA, so I can measure interrupt latencies. Mean interrupt latency is about 300 us but there are periodical or spontaneous lags up to 1 ms. It is too much for my application! I've unloaded almost all eCos packages and switched off all user's handlers.
!!!!!!!!!!!! Now I'm puzzled what event (what packadge) in eCos may cause the system to behave like this? !!!!!!!!!!! Time behaviour and response time histograms can be found here: http://vo.nfi.kiae.ru/pub/eCos/Interrupt_statistics+ADC.pdf http://vo.nfi.kiae.ru/pub/eCos/Interrupt_statistics.pdf Oscillograms show the 50 Hz filtering of the signal from industrial electrical network. Cheers, Nikolay. -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss