Sean Boudreau(deleted)
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Re: TCP RTO round up value configurable ?
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Sean Boudreau(deleted)
04/11/2008 10:30 AM
post6675
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Re: TCP RTO round up value configurable ?
On Thu, Apr 10, 2008 at 10:10:10AM -0400, Christopher Pohl wrote:
> RFC2988 Section 2.4 states that the RTO should be rounded to a minimum of 1 second, whenever it is calculated to be
faster than that. This also seems to be how the QNX stack behaves, we could never observe a RTO below 1 second (except
for peer triggered TCP fast retransmissions)
>
> In an embedded interconnect use case (with a single switch device between peers), where RTT is typically only a few
milliseconds, the relatively long RTO seems to disturb data flow / throughput sometimes.
>
> Is it possible to configure the RTO round up value somewhere / somehow, in QNX 6.3.2 or 6.4 ?
>
Not currently. It's a compile time option: TCPTV_MIN in
<netinet/tcp_timer.h>.
-seanb
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