Re: [PATCH] [RFC v3] packet: experimental support for 64-bit timestamps

[Willem de Bruijn]

On Wed, Nov 29, 2017 at 8:39 PM, Willem de Bruijn
<willemdebruijn.kernel@xxxxxxxxx> wrote:
> On Wed, Nov 29, 2017 at 3:06 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote:
>> On Wed, Nov 29, 2017 at 5:51 PM, Willem de Bruijn
>> <willemdebruijn.kernel@xxxxxxxxx> wrote:
>>>> 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!
>
> I'll reply to this thread with git send-email with an extension to
> tools/testing/selftests/net/psock_tpacket.c.

It appears that it did not end up in this thread. At least not when
using gmail threading. Patch at http://patchwork.ozlabs.org/patch/842854/