On Wed, Nov 29, 2017 at 5:51 PM, Willem de Bruijn
[off-list ref] wrote:

quoted

Thanks for the review! Any suggestions for how to do the testing? If you have
existing test cases, could you give my next version a test run to see if there
are any regressions and if the timestamps work as expected?

I see that there are test cases in tools/testing/selftests/net/, but none
of them seem to use the time stamps so far, and I'm not overly familiar
with how it works in the details to extend it in a meaningful way.

I could not find any good tests for this interface, either. The only
user of the interface I found was a little tool I wrote a few years
ago that compares timestamps at multiple points in the transmit
path for latency measurement [1]. But it may be easier to just write
a new test under tools/testing/selftests/net for this purpose. I can
help with that, too, if you want.

Thanks, that would be great!

     Arnd