Re: [PATCH v2] Add support for usbfs zerocopy.

[Steinar H. Gunderson]

On Fri, Jan 08, 2016 at 11:00:54PM -0500, Lingzhu Xiang wrote:
> Extended testing over one hour shows significant improved CPU usage
> and stability:
> The old CPU usage is about 12% +/- 5%. The new CPU usage is 4% +/- 1%.
> 
> The setup is an i7-4600U laptop running Kinect v2 with 260MB/s
> isochronous and 20MB/s bulk transfers.
> 
> The improvement in reducing jitter is particularly preferable to
> Kinect v2 driver because the isochronous data is structured and one
> packet lost means discarding a lot of data.

Thanks for testing this! It's not unexpected, but it's good to see others
are also seeing performance improvements.

/* Steinar */
-- 
Software Engineer, Google Switzerland