VXLAN UDP/IPv4 GRO can help improve VM-to-VM UDP
performance when UFO or GSO is enabled in VM, GRO
must be supported if UFO or GSO is enabled,
otherwise, performance can't get big improvement
if only GSO is there.
With this enabled in DPDK, OVS DPDK can leverage it
to improve VM-to-VM UDP performance, it will reassemble
VXLAN UDP/IPv4 fragments immediate after they are
received from a physical NIC. It is very helpful in
OVS DPDK VXLAN use case.
Signed-off-by: Yi Yang <yangyi01@inspur.com>
Acked-by: Jiayu Hu <jiayu.hu@intel.com>
UDP/IPv4 GRO can help improve VM-to-VM UDP performance
when UFO or GSO is enabled in VM, GRO must be supported
if UFO or GSO is enabled, otherwise, performance can't
get big improvement if only GSO is there.
With this enabled in DPDK, OVS DPDK can leverage it
to improve VM-to-VM UDP performance, it will reassemble
UDP fragments immediate after they are received from
a physical NIC. It is very helpful in OVS DPDK VLAN use
case.
Signed-off-by: Yi Yang <yangyi01@inspur.com>
Acked-by: Jiayu Hu <jiayu.hu@intel.com>
This patch adds GRO limitations in the programmer guide.
Fixes: 2c900d09055e ("doc: add GRO guide")
Cc: stable@dpdk.org
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
This patch adds a framework that allows GRO on tunneled packets.
Furthermore, it leverages that framework to provide GRO support for
VxLAN-encapsulated packets. Supported VxLAN packets must have an outer
IPv4 header, and contain an inner TCP/IPv4 packet.
VxLAN GRO doesn't check if input packets have correct checksums and
doesn't update checksums for output packets. Additionally, it assumes
the packets are complete (i.e., MF==0 && frag_off==0), when IP
fragmentation is possible (i.e., DF==0).
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
Reviewed-by: Junjie Chen <junjie.j.chen@intel.com>
Tested-by: Lei Yao <lei.a.yao@intel.com>
This patch complies RFC 6864 to process IPv4 ID fields. Specifically, GRO
ingores IPv4 ID fields for the packets whose DF bit is 1, and checks IPv4
ID fields for the packets whose DF bit is 0.
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
Reviewed-by: Junjie Chen <junjie.j.chen@intel.com>
This patch updates codes as follows:
- change appropriate names for internal structures, variants and functions
- update comments and the content of the gro programmer guide for better
understanding
- remove needless check and redundant comments
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
Reviewed-by: Junjie Chen <junjie.j.chen@intel.com>
Add prog_guide doc to explain the design of the GRO library.
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
Acked-by: John McNamara <john.mcnamara@intel.com>
