| Re: [chrony-dev] SW/HW timestamping on Linux |
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On Tue, Dec 13, 2016 at 05:03:15PM -0800, Denny Page wrote:
> Unfortunately, I’ve not yet received any response on the Intel list. While it’s quite clear that both the i211 and i354 require some compensation, I don’t have a good way to determine it other than by shots in the dark. The i211 seems to correspond with the i210 correction parameters, so I am currently using those for the i210, but the i354 is completely different. Still at it.
Do you know if the i211 or i354 has a PPS input? i210 does have one
[1]. I have not had a chance to try it yet. If you could connect it to
the LeoNTP unit, maybe you could measure the difference between errors
in TX and RX timestamping, and with direct connection to the server
maybe even estimate the absolute value of the TX/RX corrections.
[1] https://sourceforge.net/p/linuxptp/mailman/message/34782351/
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Miroslav Lichvar
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