Hi, On Fri, 15 Apr 2005, Olav Kongas wrote: > Leaving aside what may be "the best" way to measure the USB > performance, I did it with usb-2.0 memory stick, which was > the only device attached at the measurement time. With this > controller, it's in full speed mode, of course. Mounting a > stick that contained a 16 MB file and issuing: > > time if=a_16MB_file_on_stick of=/dev/null bs=16k > I'd rather read data from the raw device than from a file system on top of it, thus: time dd if=/dev/sda of=/dev/null bs=16k count=1024
This eliminates the influence of the file systems drivers and caches. It also eliminates the need to mount the file system and create a testfile. HTH, Lothar Wassmann ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
