Messages in this thread | | | Date | Sat, 03 Mar 2001 19:39:46 -1000 | From | Mark Reginald James <> | Subject | TCP Congestion Window Bug? |
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Hi:
TCP only sends a packet if:
tcp_packets_in_flight(tp) < tp->snd_cwnd
(function tcp_snd_test in include/net/tcp.h)
but regards transmission as application-limited if
tp->packets_out < tp->snd_cwnd
(function tcp_cwnd_validate in include/net/tcp.h)
So the kernel _always_ thinks the connection is application-limited, forcing many un-necessary reductions in the size of the congestion window.
I think the condition in tcp_snd_test should be:
tcp_packets_in_flight(tp) <= tp->snd_cwnd
Mark
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