Hi,
Here is a joint work from Mellanox and Napatech, to enable the flow hw
offload with the DPDK generic flow interface (rte_flow).
The basic idea is to associate the flow with a mark id (a unit32_t number).
Later, we then get the flow directly from the mark id, bypassing the heavy
emc processing, including miniflow_extract.
The association is done with CMAP in patch 1. It also reuses the flow
APIs introduced while adding the tc offloads. The emc bypassing is done
in patch 2. The flow offload is done in patch 4, which mainly does two
things:
- translate the ovs match to DPDK rte flow patterns
- bind those patterns with a MARK action.
Afterwards, the NIC will set the mark id in every pkt's mbuf when it
matches the flow. That's basically how we could get the flow directly
from the received mbuf.
While testing with PHY-PHY forwarding with one core and one queue, I got
about 54% performance boost. For PHY-vhost forwarding, I got about 41%
performance boost. The reason it's lower than v1 is I added the logic
to get the correct tcp_flags, which examines all packets recieved.
The major issue mentioned in last version is also workarounded: the
queue index is never set to 0 blindly anymore, but set to the rxq that
first receives the upcall pkt.
Note that it's disabled by default, which can be enabled by:
$ ovs-vsctl set Open_vSwitch . other_config:hw-offload=true
v2: - workaround the queue action issue
- fixed the tcp_flags being skipped issue, which also fixed the
build warnings
- fixed l2 patterns for Intel nic
- Converted some macros to functions
- did not hardcode the max number of flow/action
- rebased on top of the lastest code
Thanks.
--yliu
---
Finn Christensen (3):
netdev-dpdk: implement flow put with rte flow
netdev-dpdk: retry with queue action
netdev-dpdk: set FDIR config
Shachar Beiser (1):
dpif-netdev: record rx queue id for the upcall
Yuanhan Liu (4):
dpif-netdev: associate flow with a mark id
dpif-netdev: retrieve flow directly from the flow mark
netdev-dpdk: convert ufid to dpdk flow
netdev-dpdk: remove offloaded flow on deletion
lib/dp-packet.h | 14 ++
lib/dpif-netdev.c | 132 +++++++++++--
lib/flow.c | 78 ++++++++
lib/flow.h | 1 +
lib/netdev-dpdk.c | 574 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
lib/netdev.c | 1 +
lib/netdev.h | 7 +
7 files changed, 795 insertions(+), 12 deletions(-)
--
2.7.4
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