Hi, I have Fedora 12 running on dual CPU (0.8 - 1.6 GHz) Intel based Lap Top with single USB port This USB port is directly (no USB hub) connected to FTDI's FT2232HL USB device (which is integrated into Xilinx FPGA of the custom board) which is continuously sending data to usb port at Lap Top at speed from 8 to 11 GByte/sec The application software (based on FTDI's D2XX API interface) ,which is trying to receive this data, is running on that LapTop ToughBook as a real time task. The FTDI's D2XX API interface supplies the call to check whether data is locally available and another call to read it out. Typically the data bytes are available at intervals between 3 and 20 msec but sometimes the data is absent for 120 msec and longer .. The USB wireshark analyzer, installed on that Lap Top, shows that data is flowing continuously What debugging does Linux USB interface has (as built-in) to invoke in order to see what causes such long (120 msec and longer) delays ? Please cc your replies to pevnev at juno dot com Thanks ____________________________________________________________ How to Stay Asleep Cambridge Researchers have developed an all natural sleep aid just for you. http://thirdpartyoffers.juno.com/TGL3131/4d0c1f6eeb2eb85eae8st01vuc -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
