On Fri, May 30, 2014 at 5:53 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Fri, 30 May 2014 pktoss@xxxxxxxxx wrote: > If someone is concerned about performance, they should not be using > dummy-hcd. It will never perform as well as the loop driver. And > that's okay, because it was never meant to be high-performance -- it > was meant to help test gadget drivers. > > For testing purposes, faithful emulation is much more important than > performance. To get a good emulation, we need a timer resolution of > 1000 Hz, so moving to hrtimers is a good idea. But not for the reason > mentioned in the patch description. Indeed, I meant performance compared to a real USB device being connected to a real controller, not as a substitute to the loop driver of course :) It is true that my motivation behind this work is to make dummy_hcd more useful to host/gadget driver authors, not to replace other facilities :) I will update the description of the series to be more clear. Thanks a lot for the comments :) Pantelis -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
