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authorFlorin Coras <fcoras@cisco.com>2019-09-12 18:36:44 -0700
committerJohn Lo <loj@cisco.com>2019-09-25 14:54:42 +0000
commit36ebcfffbc7ab0e83b4bb8dfaec16bf16cafb954 (patch)
treefe9803af08fd55cf1c9419d6e58f45394e155a7b /src/vnet/tcp/tcp_cubic.c
parent54c93cfc2556d9c6d2cf472f51d4c2866a556ef6 (diff)
tcp: use sacks for timer based recovery
Type: feature If available, reuse sack scoreboard in timer triggered retransmit to minimize spurious retransmits. Additional changes/refactoring: - limited transmit updates - add sacked rxt count to scoreboard - prr pacing of fast retransmits - startup pacing updates - changed loss window to flight + mss Change-Id: I057de6a9d6401698bd1031d5cf5cfbb62f2bdf61 Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/tcp/tcp_cubic.c')
-rw-r--r--src/vnet/tcp/tcp_cubic.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/src/vnet/tcp/tcp_cubic.c b/src/vnet/tcp/tcp_cubic.c
index aa318961533..17f7932ea2e 100644
--- a/src/vnet/tcp/tcp_cubic.c
+++ b/src/vnet/tcp/tcp_cubic.c
@@ -103,10 +103,7 @@ cubic_congestion (tcp_connection_t * tc)
cd->w_max = w_max;
tc->ssthresh = clib_max (tc->cwnd * beta_cubic, 2 * tc->snd_mss);
-
tc->cwnd = tc->ssthresh;
- if (!tcp_opts_sack_permitted (&tc->rcv_opts))
- tc->cwnd += 3 * tc->snd_mss;
}
static void
@@ -114,11 +111,10 @@ cubic_loss (tcp_connection_t * tc)
{
cubic_data_t *cd = (cubic_data_t *) tcp_cc_data (tc);
- tc->ssthresh = clib_max (tc->cwnd * beta_cubic, 2 * tc->snd_mss);
tc->cwnd = tcp_loss_wnd (tc);
cd->t_start = cubic_time (tc->c_thread_index);
cd->K = 0;
- cd->w_max = 0;
+ cd->w_max = tc->cwnd / tc->snd_mss;
}
static void
@@ -159,7 +155,7 @@ cubic_rcv_ack (tcp_connection_t * tc, tcp_rate_sample_t * rs)
if (tcp_in_slowstart (tc))
{
- tc->cwnd += clib_min (tc->snd_mss, tc->bytes_acked);
+ tc->cwnd += tc->bytes_acked;
return;
}