DWC OTG TX path optimisation for 11-current

[Hans Petter Selasky]

Hi,

On 08/18/15 13:22, Svatopluk Kraus wrote:
> Do I understand it well that you are not able to trigger the problem?

Maybe I haven't been trying hard enough. I've been using a kernel built 
from "projects/hps_head" which I just updated to include the latest DWC 
OTG patches, instead of "head". There was today a timer subsystem fix, 
not sure if it makes any difference:

https://svnweb.freebsd.org/changeset/base/286880

I will try to buildworld from an external USB disk later today and see 
what happens.

>
> and still the system response time is terrible.

If you can do:

usbconfig -d 0.1 set_config 255

And verify that the IRQ rate goes to zero for DWC OTG, then we maybe 
could rule out USB.

--HPS