diff options
| author |   Florin Coras <fcoras@cisco.com> | 2019-10-30 09:22:14 -0700 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2019-11-11 18:45:14 +0000 |
| commit | b3dce89a768aaffa2a830ba6579cd3d9c8cd967a (patch) | |
| tree | 1b4d603d40f95fe56ef9c77a90468afb2c337240 /src/vnet/tcp/tcp.h | |
| parent | eb284a1f8f10d752285a0a59e75bc54acae50779 (diff) | |
tcp: improve lost rxt heuristic
Type: feature
- retransmit first unacked segment if newer retransmitted packets
are acked
- avoid spurious retransmits if recovery ends with sacked bytes
Change-Id: Ic1b56d22e025822edb7609afb136e47440ea6032
Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/tcp/tcp.h')
| -rw-r--r-- | src/vnet/tcp/tcp.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h index f40388721b6..7dd88bf0a49 100644 --- a/src/vnet/tcp/tcp.h +++ b/src/vnet/tcp/tcp.h @@ -1172,8 +1172,14 @@ tcp_persist_timer_set (tcp_connection_t * tc) always_inline void tcp_persist_timer_update (tcp_connection_t * tc) { - tcp_timer_update (tc, TCP_TIMER_PERSIST, - clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); + u32 interval; + + if (seq_leq (tc->snd_una, tc->snd_congestion + tc->burst_acked)) + interval = 1; + else + interval = clib_max (tc->rto * TCP_TO_TIMER_TICK, 1); + + tcp_timer_update (tc, TCP_TIMER_PERSIST, interval); } always_inline void |