Good morning to everyone,
I'm introducing some modifications to the
implementation of the TCP (Linux kernel 2.2.17)
in order to optimize performance in satellite
networks.
I have some problems and I hope you can help me:
1. I need the RTT value immediately after the
sync phase between the two TCP entities.
Is the RTT evaluated during the sync phase? If so,
can you
suggest me in which variable is it stored (infact
the
RTT values should be stored in "tp->srtt", which is
zero after the sync phase)
2. I read in a book ("TCP/IP Illustrated" which
surely
referes to an older version of linux kernel) that
the
tcp_time_stamp is practically an integer number
which
counts "ticks" of 500msec and, as a consequence, it
is
updated every 500 msec... is it possible? how could
i
have a good evaluation of RTT if i can estimate only
ticks of such a big interval?
I hope someone of You can kindly help me...
thank You in advance
Renato Narcisi
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