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| author | Richard Scheffenegger <rscheff@FreeBSD.org> | 2024-05-08 12:36:53 +0000 |
|---|---|---|
| committer | Richard Scheffenegger <rscheff@FreeBSD.org> | 2024-05-08 12:37:33 +0000 |
| commit | 2a9aae9e5f7a1a218b2c05ed28d811e533912118 (patch) | |
| tree | 7ea6d7be4b2b1f845542ac9c048ffc1e346a94c5 /usr.bin | |
| parent | dcdfe44901eca56254ac41b11b6c7b730a276935 (diff) | |
| download | src-2a9aae9e5f7a1a218b2c05ed28d811e533912118.tar.gz src-2a9aae9e5f7a1a218b2c05ed28d811e533912118.zip | |
tcp: add counter to track when SACK loss recovery uses TSO
Add a counter to track how frequently SACK has transmitted
more than one MSS using TSO. Instances when this will be
beneficial is the use of PRR, or when ACK thinning due to
GRO/LRO or ACK discards by the network are present.
Reviewed By: tuexen, #transport
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D45070
Diffstat (limited to 'usr.bin')
| -rw-r--r-- | usr.bin/netstat/inet.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/usr.bin/netstat/inet.c b/usr.bin/netstat/inet.c index 0657926eab80..5d7fd0e46cf1 100644 --- a/usr.bin/netstat/inet.c +++ b/usr.bin/netstat/inet.c @@ -783,11 +783,13 @@ tcp_stats(u_long off, const char *name, int af1 __unused, int proto __unused) p(tcps_sack_recovery_episode, "\t{:recovery-episodes/%ju} " "{N:/SACK recovery episode%s}\n"); - p(tcps_sack_rexmits, "\t{:segment-retransmits/%ju} " + p(tcps_sack_rexmits, "\t{:segment-retransmits/%ju} " "{N:/segment rexmit%s in SACK recovery episodes}\n"); - p(tcps_sack_rexmit_bytes, "\t{:byte-retransmits/%ju} " + p(tcps_sack_rexmits_tso, "\t{:tso-chunk-retransmits/%ju} " + "{N:/tso chunk rexmit%s in SACK recovery episodes}\n"); + p(tcps_sack_rexmit_bytes, "\t{:byte-retransmits/%ju} " "{N:/byte rexmit%s in SACK recovery episodes}\n"); - p(tcps_sack_rcv_blocks, "\t{:received-blocks/%ju} " + p(tcps_sack_rcv_blocks, "\t{:received-blocks/%ju} " "{N:/SACK option%s (SACK blocks) received}\n"); p(tcps_sack_send_blocks, "\t{:sent-option-blocks/%ju} " "{N:/SACK option%s (SACK blocks) sent}\n"); |