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| author | Kevin Traynor <ktraynor@redhat.com> | 2021-12-20 14:38:40 +0000 |
|---|---|---|
| committer | Ilya Maximets <i.maximets@ovn.org> | 2022-01-18 12:26:36 +0100 |
| commit | 4da71121dac58e5d28da81251829dd22786aec45 (patch) | |
| tree | d5721478bd3150dc6bbe000f24fe21dd9fb6fc96 /Documentation/topics | |
| parent | 85d3785e6a59b133e2fe195efe5729d08cb6b930 (diff) | |
| download | openvswitch-4da71121dac58e5d28da81251829dd22786aec45.tar.gz | |
Documentation: Fix Rx/Tx queue configuration section.
ovs-vsctl is used to configure physical Rx queues, not ovs-appctl.
Number of Tx queues are configured differently depending on whether
physical or virtual. Present documentation does not distinguish.
Fixes: 31d0dae22a0e ("doc: Add "PMD" topic document")
Signed-off-by: Kevin Traynor <ktraynor@redhat.com>
Acked-by: Sunil Pai G <sunil.pai.g@intel.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Diffstat (limited to 'Documentation/topics')
| -rw-r--r-- | Documentation/topics/dpdk/pmd.rst | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/Documentation/topics/dpdk/pmd.rst b/Documentation/topics/dpdk/pmd.rst index e659fefef..acb1b9a50 100644 --- a/Documentation/topics/dpdk/pmd.rst +++ b/Documentation/topics/dpdk/pmd.rst @@ -31,17 +31,19 @@ input ports for packets, classifying packets once received, and executing actions on the packets once they are classified. PMD threads utilize Receive (Rx) and Transmit (Tx) queues, commonly known as -*rxq*\s and *txq*\s. While Tx queue configuration happens automatically, Rx -queues can be configured by the user. This can happen in one of two ways: +*rxq*\s and *txq*\s to receive and send packets from/to an interface. -- For physical interfaces, configuration is done using the - :program:`ovs-appctl` utility. +- For physical interfaces, the number of Tx Queues is automatically configured + based on the number of PMD thread cores. The number of Rx queues can be + configured with:: -- For virtual interfaces, configuration is done using the :program:`ovs-appctl` - utility, but this configuration must be reflected in the guest configuration - (e.g. QEMU command line arguments). + $ ovs-vsctl set Interface <interface_name> options:n_rxq=N -The :program:`ovs-appctl` utility also provides a number of commands for +- For virtual interfaces, the number of Tx and Rx queues are configured by + libvirt/QEMU and enabled/disabled in the guest. Refer to :doc:'vhost-user' + for more information. + +The :program:`ovs-appctl` utility provides a number of commands for querying PMD threads and their respective queues. This, and all of the above, is discussed here. |