diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2018-11-07 12:38:29 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-11-07 16:23:04 -0800 |
| commit | e20cf8d3f1f763ad28a9cb3b41305b8a8a42653e (patch) | |
| tree | e2e368163d1ee2b19b75869cd06a04e32d13c8d6 /include/linux/udp.h | |
| parent | 60fb9567bf30937e6bedfa939d7c8fd4ee6a1b1c (diff) | |
udp: implement GRO for plain UDP sockets.
This is the RX counterpart of commit bec1f6f69736 ("udp: generate gso
with UDP_SEGMENT"). When UDP_GRO is enabled, such socket is also
eligible for GRO in the rx path: UDP segments directed to such socket
are assembled into a larger GSO_UDP_L4 packet.
The core UDP GRO support is enabled with setsockopt(UDP_GRO).
Initial benchmark numbers:
Before:
udp rx: 1079 MB/s 769065 calls/s
After:
udp rx: 1466 MB/s 24877 calls/s
This change introduces a side effect in respect to UDP tunnels:
after a UDP tunnel creation, now the kernel performs a lookup per ingress
UDP packet, while before such lookup happened only if the ingress packet
carried a valid internal header csum.
rfc v2 -> rfc v3:
- fixed typos in macro name and comments
- really enforce UDP_GRO_CNT_MAX, instead of UDP_GRO_CNT_MAX + 1
- acquire socket lock in UDP_GRO setsockopt
rfc v1 -> rfc v2:
- use a new option to enable UDP GRO
- use static keys to protect the UDP GRO socket lookup
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/udp.h')
| -rw-r--r-- | include/linux/udp.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/udp.h b/include/linux/udp.h index a4dafff407fb..f613b329852e 100644 --- a/include/linux/udp.h +++ b/include/linux/udp.h @@ -50,11 +50,12 @@ struct udp_sock { __u8 encap_type; /* Is this an Encapsulation socket? */ unsigned char no_check6_tx:1,/* Send zero UDP6 checksums on TX? */ no_check6_rx:1,/* Allow zero UDP6 checksums on RX? */ - encap_enabled:1; /* This socket enabled encap + encap_enabled:1, /* This socket enabled encap * processing; UDP tunnels and * different encapsulation layer set * this */ + gro_enabled:1; /* Can accept GRO packets */ /* * Following member retains the information to create a UDP header * when the socket is uncorked. |