I did try to disable the EEE feature, but it didn't help. I agree it does sounds exactly like a EEE feature.
בתאריך יום ו׳, 18 במרץ 2022, 14:33, מאת Vladimir Oltean <olte...@gmail.com >: > On Fri, Mar 18, 2022 at 02:19:24PM +0200, Joseph Matan wrote: > > Hi, > > > > I don't have an answer to your question, but I can share from my > experience > > that I'm familiar with this. I even posted a similar question a year or > so > > ago. > > I also tried to open a ticket in Intel Customer Service but nothing good > > came through. > > Maybe the e1000e developers community would have an idea (but I didn't > try > > to ask there). > > > > My problem with the i219 NIC was that with no traffic the path delay was > > around ~7 or 8 usec (as you mentioned), but in intervals of high load of > > traffic the path delay decreased significantly to something like 800 nsec > > (0.8 usec). > > These significant changes in the path delay between 8 usec to 0.8 usec > > caused me lots of accurecy troubles... (and I didn't use any switch > between > > my master and slave). > > However, from the tests I was doing, the i210 doesn't suffer from this > > behaviour. > > Intel Customer Service didn't know to answer if this is a bug or perhaps > a > > feature that can be switched off/on. > > > > Hope it helped somehow... > > Joseph > > Not sure if you've exhausted this option with Intel support, but this > sounds like the typical signature of what Energy Efficient Ethernet > would do to PTP. >
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