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| author | Cosmin Ratiu <cratiu@nvidia.com> | 2026-07-01 10:32:54 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2026-07-07 11:31:27 +0200 |
| commit | 403ac520e893a901ab1801aa6924bf694c8223a8 (patch) | |
| tree | d5180dbcc634e782a531e7f3120db6ac84a3db15 | |
| parent | b2aa7390967ee71cc7d40b849a242c27b59391ba (diff) | |
| download | linux-403ac520e893a901ab1801aa6924bf694c8223a8.tar.gz linux-403ac520e893a901ab1801aa6924bf694c8223a8.zip | |
net/mlx5: Document devlink rates
It seems rates were not documented in the mlx5-specific file, so add
examples on how to limit VFs and groups and also provide an example of
the intended way to achieve cross-esw scheduling.
Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Carolina Jubran <cjubran@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260701073254.754518-15-tariqt@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| -rw-r--r-- | Documentation/networking/devlink/mlx5.rst | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/networking/devlink/mlx5.rst b/Documentation/networking/devlink/mlx5.rst index 4bba4d780a4a..cf1dffa67669 100644 --- a/Documentation/networking/devlink/mlx5.rst +++ b/Documentation/networking/devlink/mlx5.rst @@ -419,3 +419,36 @@ User commands examples: .. note:: This command can run over all interfaces such as PF/VF and representor ports. + +Rates +===== + +mlx5 devices can limit transmission of individual VFs or a group of them via +the devlink-rate API in switchdev mode. + +User commands examples: + +- Print the existing rates:: + + $ devlink port function rate show + +- Set a max tx limit on traffic from VF0:: + + $ devlink port function rate set pci/0000:82:00.0/1 tx_max 10Gbit + +- Create a rate group with a max tx limit and add two VFs to it:: + + $ devlink port function rate add pci/0000:82:00.0/group1 tx_max 10Gbit + $ devlink port function rate set pci/0000:82:00.0/1 parent group1 + $ devlink port function rate set pci/0000:82:00.0/2 parent group1 + +- Same scenario, with a min guarantee of 20% of the bandwidth for the first VF:: + + $ devlink port function rate add pci/0000:82:00.0/group1 tx_max 10Gbit + $ devlink port function rate set pci/0000:82:00.0/1 parent group1 tx_share 2Gbit + $ devlink port function rate set pci/0000:82:00.0/2 parent group1 + +- Cross-device scheduling:: + + $ devlink port function rate add pci/0000:82:00.0/group1 tx_max 10Gbit + $ devlink port function rate set pci/0000:82:00.1/32769 parent pci/0000:82:00.0/group1 |