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doc: improve event core description in vDPA mlx5

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The event core is mlx5 vDPA driver devarg that selects the CPU core for
the internal timer thread used to manage data-path events into the
driver.

Emphasize that this CPU should be isolated for vDPA mlx5 devices only in
order to save the performance and latency of the device.

Signed-off-by: Matan Azrad <matan@nvidia.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
This commit is contained in:
Matan Azrad 2022-11-13 11:21:37 +02:00 committed by Thomas Monjalon
parent 559014f232
commit 3aed7bbd60
1 changed files with 7 additions and 2 deletions
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9
doc/guides/vdpadevs/mlx5.rst
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@ -86,8 +86,13 @@ for an additional list of options shared with other mlx5 drivers.
- ``event_core`` parameter [int]
CPU core number to set polling thread affinity to, default to control plane
cpu.
The CPU core number of the timer thread, default: EAL main lcore.
.. note::
This core can be shared among different mlx5 vDPA devices as `event_core`
but using it also for other tasks may affect the performance and the latency
of the mlx5 vDPA devices.
- ``max_conf_threads`` parameter [int]