Thank you very much for your kindly advise.
>The system timer ticks at a rate of 100 Hz on all IA32 processors. (I
>believe on Alphas it ticks at 1024 Hz but I may be imagining it.)
>Thus, the period is either 10 ms or 0.98 ms.
>
>In historic versions of FreeBSD, most TCP timers ticked at 2 Hz while
>the others ticked at 5 Hz. This was changed in advance of FreeBSD
>4.0.
I see.
Anyway, it seems to be difficult that estimating RTT, RTO within a LAN
envirounment (such as Gigabit connection).
Of course, this time scale may be valid for general internet envirounment.
I'll study more.
Thanks -
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