thanks, william. I first went an easier route. I did create a 16MB random file on the host desktop, and rcp'ed it to a ramdisk on the BBB over usb. I am getting about 4MB/sec. then I went the iperf route. your memory was excellent, except the -C switch for the client is -c. this also reports a bandwidth of about 30 Mbaud.
so, on my simple experiments (linux metal desktop, bbb rev c usb), here are my transfer speed comparisons (all in MBaud = MBit/s): serial over usb : < 10 mass storage over usb : ~ 20 ethernet over usb : ~ 30-40 theoretical usb speed : ~ 480 local eMMC speed : ~ 70 I wonder if I can figure out how to send raw messages over USB with usb_bulk_msg() on the host without a higher level protocol (ethernet, usb mass storage, serial). has anyone written already a simple "echo" script for the BBB that just responds to usb_bulk_msg requests and prints summary info on the console? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.