diff options
| -rw-r--r-- | src/vnet/tcp/tcp.c | 4 | ||||
| -rw-r--r-- | src/vnet/tcp/tcp.h | 7 |
2 files changed, 11 insertions, 0 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c index 7b5b5537613..57e62f8eade 100644 --- a/src/vnet/tcp/tcp.c +++ b/src/vnet/tcp/tcp.c @@ -1575,6 +1575,7 @@ tcp_init (vlib_main_t * vm) tm->tx_pacing = 1; tm->cc_algo = TCP_CC_NEWRENO; tm->default_mtu = 1460; + tm->initial_cwnd_multiplier = 0; return 0; } @@ -1644,6 +1645,9 @@ tcp_config_fn (vlib_main_t * vm, unformat_input_t * input) ; else if (unformat (input, "mtu %d", &tm->default_mtu)) ; + else if (unformat (input, "initial-cwnd-multiplier %d", + &tm->initial_cwnd_multiplier)) + ; else if (unformat (input, "no-tx-pacing")) tm->tx_pacing = 0; else if (unformat (input, "cc-algo %U", unformat_tcp_cc_algo, diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h index e4980dd64eb..8b943cdd5b5 100644 --- a/src/vnet/tcp/tcp.h +++ b/src/vnet/tcp/tcp.h @@ -532,6 +532,10 @@ typedef struct _tcp_main /** Default MTU to be used when establishing connections */ u16 default_mtu; + /** Initial CWND multiplier, which multiplies MSS to determine initial CWND. + * Set 0 to determine the initial CWND by another way */ + u16 initial_cwnd_multiplier; + /** Number of preallocated connections */ u32 preallocated_connections; u32 preallocated_half_open_connections; @@ -809,6 +813,9 @@ tcp_flight_size (const tcp_connection_t * tc) always_inline u32 tcp_initial_cwnd (const tcp_connection_t * tc) { + if (tcp_main.initial_cwnd_multiplier > 0) + return tcp_main.initial_cwnd_multiplier * tc->snd_mss; + if (tc->snd_mss > 2190) return 2 * tc->snd_mss; else if (tc->snd_mss > 1095) |