[netperf-talk] default timeout for netperf packets

[Rick Jones]

>> Plz inform me on the default timout of netperf packets. Can we change 
>> it???
> Which default timeout do you mean?
> 
> When one send's TCP packets, the reciever sends an ACK on recieving it. 
> If the sender does not get as ACK within a certain time limit it 
> re-transmits the packet. I wanted to know what this timeout was and if 
> we could change it as satellite links have timeout upto 600ms.

That is TCP's retransmission timer, which is something that is not 
visible to netperf.  It is all within TCP.  Changing it is platform 
specific - perhaps sysctl, perhaps ndd, perhaps "no" all depending on 
the platform.

If the TCP stack(s) on your system(s) are at all worthwhile, they should 
adapt pretty quickly to the round trip times (iirc satellite links don't 
have built-in retransmssion at the link-layer and so don't relaly have 
"timeouts") of satellite links.

rick jones