On Mon, Dec 20, 2021 at 11:19:03AM +0100, Filip Žaludek wrote: > > > > > Using 'cat' is not a good way to ever use a serial port. Please use a > > tool that can properly detect and use the serial port flow control > > settings, which should prevent the issues you are seeing here. > > > > Is socat using flow control? If so, which settings, hardware or > > software flow control? > > > > Also please note that the usb-serial devices you are using here are > > _very_ cheap and not good for huge amounts of data like you seem to want > > to use here. I would recommend a much more robust usb-serial device if > > you need high data rates and good hardware flow control handling. Most > > of the time, the devices you have here do not even have any hardware > > flow control support as the manufacturers do not hook up those lines. > > So be careful. > > > > thanks, > > > > greg k-h > > > > > > Yes, you are right! Such gadget hardware is without hw flow control. I am using > serial line only to capture console logs. I've tested both commands also with > sw flow control ixon, ixoff with similar results. > > Hopefully somebody sitting on scarce big iron with both usb port and serial port > with proper hw flow control from this list gets attracted to kindly re-test. > > Interesting part for me is that only serial to usb direction is failing.. Makes sense, these devices are not designed for lots of high-speed data being sent to them. Please use a device that is designed for that if you wish to do this. thanks, greg k-h
