cvs commit: src/sys/netinet tcp_input.c tcp_subr.c tcp_timer.h tcp_var.h

Joao Barros joao.barros at
Thu Feb 16 13:22:49 PST 2006

On 2/16/06, Andre Oppermann <andre at> wrote:
> andre       2006-02-16 19:38:07 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/netinet          tcp_input.c tcp_subr.c tcp_timer.h
>                          tcp_var.h
>   Log:
>   Have TCP Inflight disable itself if the RTT is below a certain
>   threshold.  Inflight doesn't make sense on a LAN as it has
>   trouble figuring out the maximal bandwidth because of the coarse
>   tick granularity.
>   The sysctl net.inet.tcp.inflight.rttthresh specifies the threshold
>   in milliseconds below which inflight will disengage.  It defaults
>   to 10ms.
>   Tested by:      Joao Barros <>,
>                   Rich Murphey <>
>   Sponsored by:   TCP/IP Optimization Fundraise 2005

Thank you for your work on this.
My thanks also to Robert Watson who didn't let this die and Mohan
Srinivasan who followed up.

Joao Barros

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