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| 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/uapi/linux/udp.h | |
| parent | udp: implement complete book-keeping for encap_needed (diff) | |
| download | linux-dev-e20cf8d3f1f763ad28a9cb3b41305b8a8a42653e.tar.xz linux-dev-e20cf8d3f1f763ad28a9cb3b41305b8a8a42653e.zip | |
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/uapi/linux/udp.h')
| -rw-r--r-- | include/uapi/linux/udp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/udp.h b/include/uapi/linux/udp.h index 09502de447f5..30baccb6c9c4 100644 --- a/include/uapi/linux/udp.h +++ b/include/uapi/linux/udp.h @@ -33,6 +33,7 @@ struct udphdr { #define UDP_NO_CHECK6_TX 101 /* Disable sending checksum for UDP6X */ #define UDP_NO_CHECK6_RX 102 /* Disable accpeting checksum for UDP6 */ #define UDP_SEGMENT 103 /* Set GSO segmentation size */ +#define UDP_GRO 104 /* This socket can receive UDP GRO packets */ /* UDP encapsulation types */ #define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */ |