[time-nuts] question about multi-way measurement

[Poul-Henning Kamp]

--------
In message <20181226234228.B84F240605C at ip-64-139-1-69.sjc.megapath.net>, Hal Murray writes:
>
>tvb at LeapSecond.com said:
>> But most people have only one counter (one internal or external timebase
>> reference) and one clock to be measured. So the measurements are one-to-one.
>> If you have more references or more clocks, you're welcome to combine 2, or
>> 3, or as many as you want. It gets complicated but in some cases this
>> complexity is justified. 
>
>Lots of people have several PCs, each with their own clock.  If you have your 
>time-nut hat on, they are crappy clocks with lots of common mode errors 
>(temperature, network delays).  I think the techniques should apply.

They do.  But in my experience all you end up getting is a very precise
measurement of the air-conditions performance.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.