Question about tcpTick_

[Amr A. Awadallah]

I have a question regarding the tcpTick_ parameter which sets the timer
granuality of a tcp tick in seconds. I was looking at tcp.h and it states
that for BSD the value should be 0.3, but should not it be 0.5. Isn't
the rtt tick in BSD equal to 500ms ?

Also does this granuality only control the estimates (rtt, srtt (with 3
bits on right), and rttvar(with two bits on right) ), or does it also
control the granuality of the timeout value (rto) ?

Thanks in advance,

-- Amr