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author | Daniele Di Proietto <diproiettod@vmware.com> | 2017-01-18 17:31:51 -0800 |
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committer | Daniele Di Proietto <diproiettod@vmware.com> | 2017-01-19 11:13:45 -0800 |
commit | fafa41a67535bcdbf408f6c0c351a63e0973a8ab (patch) | |
tree | 8b52f02afe7d2b6804af50b1542270cf1c91aaab | |
parent | 41a15b71ed1ef35aa612a1128082219fbfc3f327 (diff) | |
download | openvswitch-fafa41a67535bcdbf408f6c0c351a63e0973a8ab.tar.gz |
Documentation: Update DPDK doc after port naming change.
options:dpdk-devargs is always required now. This commit also changes
some of the names from 'dpdk0' to various others.
netdev-dpdk/detach accepts a PCI id instead of a port name.
CC: Ciara Loftus <ciara.loftus@intel.com>
Fixes: 55e075e65ef9("netdev-dpdk: Arbitrary 'dpdk' port naming")
Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
Acked-by: Ciara Loftus <ciara.loftus@intel.com>
-rw-r--r-- | Documentation/howto/dpdk.rst | 77 | ||||
-rw-r--r-- | Documentation/howto/userspace-tunneling.rst | 2 |
2 files changed, 43 insertions, 36 deletions
diff --git a/Documentation/howto/dpdk.rst b/Documentation/howto/dpdk.rst index fbb4b5361..d1e6e899f 100644 --- a/Documentation/howto/dpdk.rst +++ b/Documentation/howto/dpdk.rst @@ -44,8 +44,10 @@ ovs-vsctl can also be used to add DPDK devices. OVS expects DPDK device names to start with ``dpdk`` and end with a portid. ovs-vswitchd should print the number of dpdk devices found in the log file:: - $ ovs-vsctl add-port br0 dpdk0 -- set Interface dpdk0 type=dpdk - $ ovs-vsctl add-port br0 dpdk1 -- set Interface dpdk1 type=dpdk + $ ovs-vsctl add-port br0 dpdk-p0 -- set Interface dpdk-p0 type=dpdk \ + options:dpdk-devargs=0000:01:00.0 + $ ovs-vsctl add-port br0 dpdk-p1 -- set Interface dpdk-p1 type=dpdk \ + options:dpdk-devargs=0000:01:00.1 After the DPDK ports get added to switch, a polling thread continuously polls DPDK devices and consumes 100% of the core, as can be checked from ``top`` and @@ -55,12 +57,12 @@ DPDK devices and consumes 100% of the core, as can be checked from ``top`` and $ ps -eLo pid,psr,comm | grep pmd Creating bonds of DPDK interfaces is slightly different to creating bonds of -system interfaces. For DPDK, the interface type must be explicitly set. For -example:: +system interfaces. For DPDK, the interface type and devargs must be explicitly +set. For example:: - $ ovs-vsctl add-bond br0 dpdkbond dpdk0 dpdk1 \ - -- set Interface dpdk0 type=dpdk \ - -- set Interface dpdk1 type=dpdk + $ ovs-vsctl add-bond br0 dpdkbond p0 p1 \ + -- set Interface p0 type=dpdk options:dpdk-devargs=0000:01:00.0 \ + -- set Interface p1 type=dpdk options:dpdk-devargs=0000:01:00.1 To stop ovs-vswitchd & delete bridge, run:: @@ -98,7 +100,7 @@ where: For example:: - $ ovs-vsctl set interface dpdk0 options:n_rxq=4 \ + $ ovs-vsctl set interface dpdk-p0 options:n_rxq=4 \ other_config:pmd-rxq-affinity="0:3,1:7,3:8" This will ensure: @@ -165,27 +167,27 @@ Flow Control Flow control can be enabled only on DPDK physical ports. To enable flow control support at tx side while adding a port, run:: - $ ovs-vsctl add-port br0 dpdk0 -- \ - set Interface dpdk0 type=dpdk options:tx-flow-ctrl=true + $ ovs-vsctl add-port br0 dpdk-p0 -- set Interface dpdk-p0 type=dpdk \ + options:dpdk-devargs=0000:01:00.0 options:tx-flow-ctrl=true Similarly, to enable rx flow control, run:: - $ ovs-vsctl add-port br0 dpdk0 -- \ - set Interface dpdk0 type=dpdk options:rx-flow-ctrl=true + $ ovs-vsctl add-port br0 dpdk-p0 -- set Interface dpdk-p0 type=dpdk \ + options:dpdk-devargs=0000:01:00.0 options:rx-flow-ctrl=true To enable flow control auto-negotiation, run:: - $ ovs-vsctl add-port br0 dpdk0 -- \ - set Interface dpdk0 type=dpdk options:flow-ctrl-autoneg=true + $ ovs-vsctl add-port br0 dpdk-p0 -- set Interface dpdk-p0 type=dpdk \ + options:dpdk-devargs=0000:01:00.0 options:flow-ctrl-autoneg=true To turn ON the tx flow control at run time for an existing port, run:: - $ ovs-vsctl set Interface dpdk0 options:tx-flow-ctrl=true + $ ovs-vsctl set Interface dpdk-p0 options:tx-flow-ctrl=true The flow control parameters can be turned off by setting ``false`` to the respective parameter. To disable the flow control at tx side, run:: - $ ovs-vsctl set Interface dpdk0 options:tx-flow-ctrl=false + $ ovs-vsctl set Interface dpdk-p0 options:tx-flow-ctrl=false pdump ----- @@ -234,13 +236,12 @@ enable Jumbo Frames support for a DPDK port, change the Interface's ``mtu_request`` attribute to a sufficiently large value. For example, to add a DPDK Phy port with MTU of 9000:: - $ ovs-vsctl add-port br0 dpdk0 \ - -- set Interface dpdk0 type=dpdk \ - -- set Interface dpdk0 mtu_request=9000` + $ ovs-vsctl add-port br0 dpdk-p0 -- set Interface dpdk-p0 type=dpdk \ + options:dpdk-devargs=0000:01:00.0 mtu_request=9000 Similarly, to change the MTU of an existing port to 6200:: - $ ovs-vsctl set Interface dpdk0 mtu_request=6200 + $ ovs-vsctl set Interface dpdk-p0 mtu_request=6200 Some additional configuration is needed to take advantage of jumbo frames with vHost ports: @@ -280,14 +281,14 @@ By default, DPDK physical ports are enabled with Rx checksum offload. Rx checksum offload can be configured on a DPDK physical port either when adding or at run time. -To disable Rx checksum offload when adding a DPDK port dpdk0:: +To disable Rx checksum offload when adding a DPDK port dpdk-p0:: - $ ovs-vsctl add-port br0 dpdk0 -- set Interface dpdk0 type=dpdk \ - options:rx-checksum-offload=false + $ ovs-vsctl add-port br0 dpdk-p0 -- set Interface dpdk-p0 type=dpdk \ + options:dpdk-devargs=0000:01:00.0 options:rx-checksum-offload=false -Similarly to disable the Rx checksum offloading on a existing DPDK port dpdk0:: +Similarly to disable the Rx checksum offloading on a existing DPDK port dpdk-p0:: - $ ovs-vsctl set Interface dpdk0 type=dpdk options:rx-checksum-offload=false + $ ovs-vsctl set Interface dpdk-p0 options:rx-checksum-offload=false Rx checksum offload can offer performance improvement only for tunneling traffic in OVS-DPDK because the checksum validation of tunnel packets is @@ -318,7 +319,7 @@ Then it can be attached to OVS:: It is also possible to detach a port from ovs, the user has to remove the port using the del-port command, then it can be detached using:: - $ ovs-appctl netdev-dpdk/detach dpdkx + $ ovs-appctl netdev-dpdk/detach 0000:01:00.0 This feature is not supported with VFIO and does not work with some NICs. For more information please refer to the `DPDK Port Hotplug Framework @@ -388,15 +389,18 @@ Add a userspace bridge and two ``dpdk`` (PHY) ports:: $ ovs-vsctl add-br br0 -- set bridge br0 datapath_type=netdev # Add two dpdk ports - $ ovs-vsctl add-port br0 dpdk0 -- set Interface dpdk0 type=dpdk - $ ovs-vsctl add-port br0 dpdk1 -- set Interface dpdk1 type=dpdk + $ ovs-vsctl add-port br0 phy0 -- set Interface phy0 type=dpdk \ + options:dpdk-devargs=0000:01:00.0 ofport_request=1 + + $ ovs-vsctl add-port br0 phy1 -- set Interface phy1 type=dpdk + options:dpdk-devargs=0000:01:00.1 ofport_request=2 Add test flows to forward packets betwen DPDK port 0 and port 1:: # Clear current flows $ ovs-ofctl del-flows br0 - # Add flows between port 1 (dpdk0) to port 2 (dpdk1) + # Add flows between port 1 (phy0) to port 2 (phy1) $ ovs-ofctl add-flow br0 in_port=1,action=output:2 $ ovs-ofctl add-flow br0 in_port=2,action=output:1 @@ -414,14 +418,17 @@ ports:: $ ovs-vsctl add-br br0 -- set bridge br0 datapath_type=netdev # Add two dpdk ports - $ ovs-vsctl add-port br0 dpdk0 -- set Interface dpdk0 type=dpdk - $ ovs-vsctl add-port br0 dpdk1 -- set Interface dpdk1 type=dpdk + $ ovs-vsctl add-port br0 phy0 -- set Interface phy0 type=dpdk \ + options:dpdk-devargs=0000:01:00.0 ofport_request=1 + + $ ovs-vsctl add-port br0 phy1 -- set Interface phy1 type=dpdk + options:dpdk-devargs=0000:01:00.1 ofport_request=2 # Add two dpdkvhostuser ports $ ovs-vsctl add-port br0 dpdkvhostuser0 \ - -- set Interface dpdkvhostuser0 type=dpdkvhostuser + -- set Interface dpdkvhostuser0 type=dpdkvhostuser ofport_request=3 $ ovs-vsctl add-port br0 dpdkvhostuser1 \ - -- set Interface dpdkvhostuser1 type=dpdkvhostuser + -- set Interface dpdkvhostuser1 type=dpdkvhostuser ofport_request=4 Add test flows to forward packets betwen DPDK devices and VM ports:: @@ -532,8 +539,8 @@ devices to bridge ``br0``. Once complete, follow the below steps: virtio device connection and doesn't need manual configuration:: $ ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0xc - $ ovs-vsctl set Interface dpdk0 options:n_rxq=2 - $ ovs-vsctl set Interface dpdk1 options:n_rxq=2 + $ ovs-vsctl set Interface phy0 options:n_rxq=2 + $ ovs-vsctl set Interface phy1 options:n_rxq=2 2. Instantiate Guest VM using QEMU cmdline diff --git a/Documentation/howto/userspace-tunneling.rst b/Documentation/howto/userspace-tunneling.rst index 6f73c4cd4..d978b3025 100644 --- a/Documentation/howto/userspace-tunneling.rst +++ b/Documentation/howto/userspace-tunneling.rst @@ -151,7 +151,7 @@ Perform the folowing configuration on `host1`: ``vfio`` driver, run:: $ ovs-vsctl --timeout 10 add-port br-phy dpdk0 \ - -- set Interface dpdk0 type=dpdk + -- set Interface dpdk0 type=dpdk options:dpdk-devargs=0000:06:00.0 $ ip addr add 172.168.1.1/24 dev br-phy $ ip link set br-phy up $ iptables -F |