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Date: Wed, 29 Nov 2017 21:06:10 +0100 From: Arnd Bergmann <arnd@...db.de> To: Willem de Bruijn <willemdebruijn.kernel@...il.com> Cc: "David S. Miller" <davem@...emloft.net>, Willem de Bruijn <willemb@...gle.com>, Björn Töpel <bjorn.topel@...il.com>, Richard Cochran <richardcochran@...il.com>, Thomas Gleixner <tglx@...utronix.de>, Mike Maloney <maloney@...gle.com>, Eric Dumazet <edumazet@...gle.com>, Kees Cook <keescook@...omium.org>, Hans Liljestrand <ishkamiel@...il.com>, Andrey Konovalov <andreyknvl@...gle.com>, "Rosen, Rami" <rami.rosen@...el.com>, "Reshetova, Elena" <elena.reshetova@...el.com>, Sowmini Varadhan <sowmini.varadhan@...cle.com>, Network Development <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] [RFC v3] packet: experimental support for 64-bit timestamps On Wed, Nov 29, 2017 at 5:51 PM, Willem de Bruijn <willemdebruijn.kernel@...il.com> 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! Arnd
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