This patch series reduces lost retransmits in recovery, in particular when dealing with traffic policers. The main problem is that slow start in recovery under policing can cause massive lost and retransmit storms: any excess sending rate turns into drops. The solution is to avoid doing slow start when lost retransmit is detected and use packet conservation instead.
On networks with traffic policers the patches have lowered the TCP loss rates by ~20% from Google servers without latency regressions. Yuchung Cheng (2): tcp: reduce cwnd if retransmit is lost in CA_Loss tcp: PRR uses CRB mode by default and SS mode conditionally net/ipv4/tcp_input.c | 43 +++++++++++++++++++++++-------------------- 1 file changed, 23 insertions(+), 20 deletions(-) -- 2.4.3.573.g4eafbef -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
