From 85fc13004df7f67012a04e73564ecef1b3641ef3 Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Wed, 26 Jun 2019 09:12:34 -0700 Subject: tcp: improve rate estimate Type:feature - sample rtt estimation - report acked+sacked - report last lost bytes - use snd_una == snd_nxt to detect 0 bytes in flight Change-Id: I83181261fdb375c7e33d24b7a82343561e6a905f Signed-off-by: Florin Coras --- src/vnet/tcp/tcp.h | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'src/vnet/tcp/tcp.h') diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h index d736685771d..7ccc06aea9c 100644 --- a/src/vnet/tcp/tcp.h +++ b/src/vnet/tcp/tcp.h @@ -249,18 +249,24 @@ typedef struct tcp_bt_sample_ u32 prev; /**< Previous sample index in list */ u32 min_seq; /**< Min seq number in sample */ u32 max_seq; /**< Max seq number. Set for rxt samples */ - u64 delivered; /**< Total delivered when sample taken */ + 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 */ tcp_bts_flags_t flags; /**< Sample flag */ } tcp_bt_sample_t; typedef struct tcp_rate_sample_ { - u64 sample_delivered; /**< Delivered of sample used for rate */ - u32 delivered; /**< Bytes delivered in ack time */ - f64 ack_time; /**< Time to ack the bytes delivered */ + u64 prior_delivered; /**< Delivered of sample used for rate, i.e., + total bytes delivered at prior_time */ + 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 */ tcp_bts_flags_t flags; /**< Rate sample flags from bt sample */ } tcp_rate_sample_t; -- cgit 1.2.3-korg