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| author | Mike Maloney <maloney@google.com> | 2017-08-22 17:08:48 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-23 20:30:47 -0700 |
| commit | 98aaa913b4ed250324429f0a9e6d5f77a3b5276c (patch) | |
| tree | 651cb3f820b76e3b199d25c4997dd0e494cdcc06 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | liquidio: change manner of detecting whether or not NIC firmware is loaded (diff) | |
| download | linux-98aaa913b4ed250324429f0a9e6d5f77a3b5276c.tar.gz linux-98aaa913b4ed250324429f0a9e6d5f77a3b5276c.zip | |
tcp: Extend SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg
When SOF_TIMESTAMPING_RX_SOFTWARE is enabled for tcp sockets, return the
timestamp corresponding to the highest sequence number data returned.
Previously the skb->tstamp is overwritten when a TCP packet is placed
in the out of order queue. While the packet is in the ooo queue, save the
timestamp in the TCB_SKB_CB. This space is shared with the gso_*
options which are only used on the tx path, and a previously unused 4
byte hole.
When skbs are coalesced either in the sk_receive_queue or the
out_of_order_queue always choose the timestamp of the appended skb to
maintain the invariant of returning the timestamp of the last byte in
the recvmsg buffer.
Signed-off-by: Mike Maloney <maloney@google.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions