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| author | David S. Miller <davem@davemloft.net> | 2018-08-01 09:56:11 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-08-01 09:56:11 -0700 |
| commit | fab9593df10691b02da99b5ce9ed6930c020eedc (patch) | |
| tree | 5debcce08aca141b24d1a5c9875d73cae07f3394 /include/linux/tcp.h | |
| parent | 53dd9652b5f530da2739298025c8324b6a4d0f21 (diff) | |
| parent | 7ec65372ca534217b53fd208500cf7aac223a383 (diff) | |
| download | linux-fab9593df10691b02da99b5ce9ed6930c020eedc.tar.gz linux-fab9593df10691b02da99b5ce9ed6930c020eedc.tar.bz2 linux-fab9593df10691b02da99b5ce9ed6930c020eedc.zip | |
Merge branch 'tcp-add-4-new-stats'
Wei Wang says:
====================
tcp: add 4 new stats
This patch series adds 3 RFC4898 stats:
1. tcpEStatsPerfHCDataOctetsOut
2. tcpEStatsPerfOctetsRetrans
3. tcpEStatsStackDSACKDups
and an addtional stat to record the number of data packet reordering
events seen:
4. tcp_reord_seen
Together with the existing stats, application can use them to measure
the retransmission rate in bytes, exclude spurious retransmissions
reflected by DSACK, and keep track of the reordering events on live
connections.
In particular the networks with different MTUs make bytes-based loss stats
more useful. Google servers have been using these stats for many years to
instrument transport and network performance.
Note: The first patch is a refactor to add a helper to calculate
opt_stats size in order to make later changes cleaner.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/tcp.h')
| -rw-r--r-- | include/linux/tcp.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 58a8d7d71354..263e37271afd 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -181,10 +181,16 @@ struct tcp_sock { u32 data_segs_out; /* RFC4898 tcpEStatsPerfDataSegsOut * total number of data segments sent. */ + u64 bytes_sent; /* RFC4898 tcpEStatsPerfHCDataOctetsOut + * total number of data bytes sent. + */ u64 bytes_acked; /* RFC4898 tcpEStatsAppHCThruOctetsAcked * sum(delta(snd_una)), or how many bytes * were acked. */ + u32 dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups + * total number of DSACK blocks received + */ u32 snd_una; /* First byte we want an ack for */ u32 snd_sml; /* Last byte of the most recently transmitted small packet */ u32 rcv_tstamp; /* timestamp of last received ACK (for keepalives) */ @@ -214,8 +220,7 @@ struct tcp_sock { #define TCP_RACK_RECOVERY_THRESH 16 u8 reo_wnd_persist:5, /* No. of recovery since last adj */ dsack_seen:1, /* Whether DSACK seen after last adj */ - advanced:1, /* mstamp advanced since last lost marking */ - reord:1; /* reordering detected */ + advanced:1; /* mstamp advanced since last lost marking */ } rack; u16 advmss; /* Advertised MSS */ u8 compressed_ack; @@ -261,6 +266,7 @@ struct tcp_sock { u8 ecn_flags; /* ECN status bits. */ u8 keepalive_probes; /* num of allowed keep alive probes */ u32 reordering; /* Packet reordering metric. */ + u32 reord_seen; /* number of data packet reordering events */ u32 snd_up; /* Urgent pointer */ /* @@ -330,6 +336,9 @@ struct tcp_sock { * the first SYN. */ u32 undo_marker; /* snd_una upon a new recovery episode. */ int undo_retrans; /* number of undoable retransmissions. */ + u64 bytes_retrans; /* RFC4898 tcpEStatsPerfOctetsRetrans + * Total data bytes retransmitted + */ u32 total_retrans; /* Total retransmits for entire connection */ u32 urg_seq; /* Seq of received urgent pointer */ |