On Thu, 27 Dec 2012 11:30:37 -0800 Jim Lux <jim...@earthlink.net> wrote:
> So, what about the USB-Ethernet dongles? (I use them a lot at work to > add a second interface for a laptop in test equipment setups, talking to > a Prologix, for instance) A lot worse! One thing is that USB has a polled protocol (ie the host has to ask whether the device has any data) and the slot when an USB device can signal that a packet came in repeates it self at most a couple of times per 1ms frame for FS (don't know from the top of my head for HS). The bigger issue though is that drivers for ethernet dongles are usally of quite bad quality (ie it takes them a long time to do anything), and they try to queue as much as possible to increase troughput (which adds unpredictable delay). Attila Kinali -- There is no secret ingredient -- Po, Kung Fu Panda _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.