diff options
| author |   Florin Coras <fcoras@cisco.com> | 2019-03-28 13:21:19 -0700 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2019-03-29 07:56:26 +0000 |
| commit | f20fd1ac904a68ee8e9099db1287b843fd00ee79 (patch) | |
| tree | a779ea1c22746593c3fbd4253ebaca491166b03c /src/vnet/tcp | |
| parent | 96d4e533638f585feb606e04b837396be5c503ed (diff) | |
tcp: improve updating of rcv wnd
Change-Id: I0b8a311979d3ccd15f3854e7ac44ca9951dc6ce4
Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/tcp')
| -rw-r--r-- | src/vnet/tcp/tcp_output.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c index 30549c4e729..b1e848c5376 100644 --- a/src/vnet/tcp/tcp_output.c +++ b/src/vnet/tcp/tcp_output.c @@ -130,20 +130,19 @@ tcp_initial_window_to_advertise (tcp_connection_t * tc) return clib_min (tc->rcv_wnd, TCP_WND_MAX); } -static void +static inline void tcp_update_rcv_wnd (tcp_connection_t * tc) { + u32 available_space, wnd; i32 observed_wnd; - u32 available_space, max_fifo, wnd; + + ASSERT (tc->rcv_opts.mss < transport_rx_fifo_size (&tc->connection)); /* * Figure out how much space we have available */ available_space = transport_max_rx_enqueue (&tc->connection); - max_fifo = transport_rx_fifo_size (&tc->connection); - - ASSERT (tc->rcv_opts.mss < max_fifo); - if (available_space < tc->rcv_opts.mss && available_space < max_fifo >> 3) + if (PREDICT_FALSE (available_space < tc->rcv_opts.mss)) available_space = 0; /* @@ -151,13 +150,11 @@ tcp_update_rcv_wnd (tcp_connection_t * tc) * to compute the new window */ observed_wnd = (i32) tc->rcv_wnd - (tc->rcv_nxt - tc->rcv_las); - if (observed_wnd < 0) - observed_wnd = 0; /* Bad. Thou shalt not shrink */ - if (available_space < observed_wnd) + if (PREDICT_FALSE ((i32) available_space < observed_wnd)) { - wnd = observed_wnd; + wnd = clib_max (observed_wnd, 0); TCP_EVT_DBG (TCP_EVT_RCV_WND_SHRUNK, tc, observed_wnd, available_space); } else |