From: "Xia, Chenbo" <chenbo.xia@intel.com>
To: Matan Azrad <matan@nvidia.com>,
Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: RE: [PATCH] doc: improve event core description in vDPA mlx5
Date: Mon, 21 Nov 2022 01:38:48 +0000 [thread overview]
Message-ID: <SN6PR11MB35045FDC0FBF78A49DC68EF29C0A9@SN6PR11MB3504.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20221113092137.1252803-1-matan@nvidia.com>
> -----Original Message-----
> From: Matan Azrad <matan@nvidia.com>
> Sent: Sunday, November 13, 2022 5:22 PM
> To: Maxime Coquelin <maxime.coquelin@redhat.com>
> Cc: dev@dpdk.org
> Subject: [PATCH] doc: improve event core description in vDPA mlx5
>
> 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>
> ---
> doc/guides/vdpadevs/mlx5.rst | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/doc/guides/vdpadevs/mlx5.rst b/doc/guides/vdpadevs/mlx5.rst
> index 9767fbe42d..3b5ce6df38 100644
> --- a/doc/guides/vdpadevs/mlx5.rst
> +++ b/doc/guides/vdpadevs/mlx5.rst
> @@ -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]
>
> --
> 2.25.1
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
next prev parent reply other threads:[~2022-11-21 1:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-13 9:21 Matan Azrad
2022-11-21 1:38 ` Xia, Chenbo [this message]
2022-11-21 19:50 ` Thomas Monjalon
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