DWC OTG TX path optimisation for 11-current

[Hans Petter Selasky]

On 08/12/15 15:35, Hans Petter Selasky wrote:
> On 07/31/15 17:11, Svatopluk Kraus wrote:
>> Note that I got about 24000 interrupts per a second during buildworld
>> too. If I remember it correctly, it was about 4000 before r285935.
>> When the trigger is pulled, the count is changing (in range of 4000 to
>> 21000). It looks like something is taking more time (interrupt
>> servicing probably). According to "systat -v", disk is going to be
>> 100% (and more) busy very often for example.
>
> Hi,
>
> Finally my RPI-2 arrived :-)
>
> After r285935 we are polling for data more frequently, so the IRQ rate
> will go up. 3x 8000 IRQs/second would be normal to query the device
> every 125us, which the EHCI does.
>
> Can you give me some more information about your setup, so that I can
> reproduce it?
>
> How many USB devices are there in total, and how are the filesystems
> mounted?
>
> --HPS

Are you using SSH or UART for console?

--HPS