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authorFlorin Coras <fcoras@cisco.com>2019-09-10 23:26:27 -0700
committerAndrew Yourtchenko <ayourtch@gmail.com>2019-09-30 15:27:12 +0000
commit69460ae11c71cbab2b298b85dbddb4f2add8fb67 (patch)
treee9d4476364c8910c81330e34924b87c853568607 /src/vnet/tcp
parent079895d95f40a0f32e2bafcaf16f167f60633edf (diff)
tcp: compute snd time for rate sample
Type: feature Change-Id: I6bd675dc28dbc34293e895911efe986844c0564f Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 7436b436733ea7217e745f3cc9971aaff1e3dfa4)
Diffstat (limited to 'src/vnet/tcp')
-rw-r--r--src/vnet/tcp/tcp.h4
-rw-r--r--src/vnet/tcp/tcp_bt.c13
2 files changed, 11 insertions, 6 deletions
diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h
index 4c4a9a525af..227b3f8a856 100644
--- a/src/vnet/tcp/tcp.h
+++ b/src/vnet/tcp/tcp.h
@@ -240,7 +240,7 @@ typedef struct tcp_bt_sample_
u64 delivered; /**< Total delivered bytes for sample */
f64 delivered_time; /**< Delivered time when sample taken */
f64 tx_time; /**< Transmit time for the burst */
- u64 tx_rate; /**< Tx pacing rate */
+ f64 first_tx_time; /**< Connection first tx time at tx */
tcp_bts_flags_t flags; /**< Sample flag */
} tcp_bt_sample_t;
@@ -251,7 +251,6 @@ typedef struct tcp_rate_sample_
f64 prior_time; /**< Delivered time of sample used for rate */
f64 interval_time; /**< Time to ack the bytes delivered */
f64 rtt_time; /**< RTT for sample */
- u64 tx_rate; /**< Tx pacing rate */
u32 delivered; /**< Bytes delivered in interval_time */
u32 acked_and_sacked; /**< Bytes acked + sacked now */
u32 lost; /**< Bytes lost now */
@@ -394,6 +393,7 @@ typedef struct _tcp_connection
u64 delivered; /**< Total bytes delivered to peer */
u64 app_limited; /**< Delivered when app-limited detected */
f64 delivered_time; /**< Time last bytes were acked */
+ f64 first_tx_time; /**< Send time for recently delivered/sent */
tcp_byte_tracker_t *bt; /**< Tx byte tracker */
tcp_errors_t errors; /**< Soft connection errors */
diff --git a/src/vnet/tcp/tcp_bt.c b/src/vnet/tcp/tcp_bt.c
index fe007543cd0..b550fdd65dd 100644
--- a/src/vnet/tcp/tcp_bt.c
+++ b/src/vnet/tcp/tcp_bt.c
@@ -241,8 +241,8 @@ tcp_bt_alloc_tx_sample (tcp_connection_t * tc, u32 min_seq)
bts = bt_alloc_sample (tc->bt, min_seq);
bts->delivered = tc->delivered;
bts->delivered_time = tc->delivered_time;
- bts->tx_rate = transport_connection_tx_pacer_rate (&tc->connection);
bts->tx_time = tcp_time_now_us (tc->c_thread_index);
+ bts->first_tx_time = tc->first_tx_time;
bts->flags |= tc->app_limited ? TCP_BTS_IS_APP_LIMITED : 0;
return bts;
}
@@ -270,7 +270,10 @@ tcp_bt_track_tx (tcp_connection_t * tc)
u32 bts_index;
if (tc->snd_una == tc->snd_nxt)
- tc->delivered_time = tcp_time_now_us (tc->c_thread_index);
+ {
+ tc->delivered_time = tcp_time_now_us (tc->c_thread_index);
+ tc->first_tx_time = tc->delivered_time;
+ }
bts = tcp_bt_alloc_tx_sample (tc, tc->snd_nxt);
bts_index = bt_sample_index (bt, bts);
@@ -421,9 +424,10 @@ tcp_bt_sample_to_rate_sample (tcp_connection_t * tc, tcp_bt_sample_t * bts,
rs->prior_delivered = bts->delivered;
rs->prior_time = bts->delivered_time;
+ rs->interval_time = bts->tx_time - bts->first_tx_time;
rs->rtt_time = bts->tx_time;
- rs->tx_rate = bts->tx_rate;
rs->flags = bts->flags;
+ tc->first_tx_time = bts->tx_time;
}
static void
@@ -529,7 +533,8 @@ tcp_bt_sample_delivery_rate (tcp_connection_t * tc, tcp_rate_sample_t * rs)
if (tc->sack_sb.last_sacked_bytes)
tcp_bt_walk_samples_ooo (tc, rs);
- rs->interval_time = tc->delivered_time - rs->prior_time;
+ rs->interval_time = clib_max (tc->delivered_time - rs->prior_time,
+ rs->interval_time);
rs->delivered = tc->delivered - rs->prior_delivered;
rs->rtt_time = tc->delivered_time - rs->rtt_time;
rs->acked_and_sacked = delivered;