On Tue Jun 14 11, Hans Petter Selasky wrote: > On Tuesday 14 June 2011 14:52:08 Alexander Motin wrote: > > Hans Petter Selasky wrote: > > Done: > > http://svn.freebsd.org/changeset/base/223098
btw., if i might ask a technical and probably naive question: does USB 3.0 feature *full* backward compatibility? that is supporting usb 1.x and usb 2.0 devices without the need for enabling those legacy controllers? so will xhci give me all the backward compatibility or do i have to also enable a combination of ohci/uhci/ehci? with usb 2.0 there was no usb 1.x support unless ohci/uhci was also enabled. i read that the xhci controllers don't depend on CPU and I/O availability as much as the old controllers. doing CPU intensive tasks shouldn't have such a massive effect on USB transfer times, compared to usb 1.x and 2.0. that's why i'd like to completely get rid of the need for ohci/uhci/ehci in my kernel config. i'd really like to see some transfer time statistics with CPU being close to 100% idle and with CPU being hammered close to 100% with usb 3.0. i think i did such a test a while ago for usb 2.0 and transfer rates dropped quite significantly. cheers. alex > > --HPS -- a13x _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "[email protected]"
