From: Thomas Monjalon <thomas@monjalon.net>
To: Jiawei Wang <jiaweiw@nvidia.com>
Cc: viacheslavo@nvidia.com, orika@nvidia.com,
Aman Singh <aman.deep.singh@intel.com>,
Yuying Zhang <yuying.zhang@intel.com>,
Ferruh Yigit <ferruh.yigit@amd.com>,
Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
dev@dpdk.org, rasland@nvidia.com, jerinj@marvell.com
Subject: Re: [RFC 2/5] ethdev: introduce the affinity field in Tx queue API
Date: Wed, 18 Jan 2023 12:37:12 +0100 [thread overview]
Message-ID: <2006382.jNaZZp9DzI@thomas> (raw)
In-Reply-To: <20221221102934.13822-3-jiaweiw@nvidia.com>
21/12/2022 11:29, Jiawei Wang:
> For the multiple hardware ports connect to a single DPDK port (mhpsdp),
> the previous patch introduces the new rte flow item to match the port
> affinity of the received packets.
>
> This patch adds the tx_affinity setting in Tx queue API, the affinity value
> reflects packets be sent to which hardware port.
I think "affinity" means we would like packet to be sent
on a specific hardware port, but it is not mandatory.
Is it the meaning you want? Or should it be a mandatory port?
> Adds the new tx_affinity field into the padding hole of rte_eth_txconf
> structure, the size of rte_eth_txconf keeps the same. Adds a suppress
> type for structure change in the ABI check file.
>
> This patch adds the testpmd command line:
> testpmd> port config (port_id) txq (queue_id) affinity (value)
>
> For example, there're two hardware ports connects to a single DPDK
connects -> connected
> port (port id 0), and affinity 1 stood for hard port 1 and affinity
> 2 stood for hardware port 2, used the below command to config
> tx affinity for each TxQ:
> port config 0 txq 0 affinity 1
> port config 0 txq 1 affinity 1
> port config 0 txq 2 affinity 2
> port config 0 txq 3 affinity 2
>
> These commands config the TxQ index 0 and TxQ index 1 with affinity 1,
> uses TxQ 0 or TxQ 1 send packets, these packets will be sent from the
> hardware port 1, and similar with hardware port 2 if sending packets
> with TxQ 2 or TxQ 3.
[...]
> @@ -212,6 +212,10 @@ API Changes
> +* ethdev: added a new field:
> +
> + - Tx affinity per-queue ``rte_eth_txconf.tx_affinity``
Adding a new field is not an API change because
existing applications don't need to update their code
if they don't care this new field.
I think you can remove this note.
> --- a/lib/ethdev/rte_ethdev.h
> +++ b/lib/ethdev/rte_ethdev.h
> @@ -1138,6 +1138,7 @@ struct rte_eth_txconf {
> less free descriptors than this value. */
>
> uint8_t tx_deferred_start; /**< Do not start queue with rte_eth_dev_start(). */
> + uint8_t tx_affinity; /**< Drives the setting of affinity per-queue. */
Why "Drives"? It is the setting, right?
rte_eth_txconf is per-queue so no need to repeat.
I think a good comment here would be to mention it is a physical port index for mhpsdp.
Another good comment would be to specify how ports are numbered.
next prev parent reply other threads:[~2023-01-18 11:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-21 10:29 [RFC 0/5] add new port affinity item and affinity " Jiawei Wang
2022-12-21 10:29 ` [RFC 1/5] ethdev: add port affinity match item Jiawei Wang
2023-01-11 16:41 ` Ori Kam
2023-01-18 11:07 ` Thomas Monjalon
2023-01-18 14:41 ` Jiawei(Jonny) Wang
2023-01-18 16:26 ` Thomas Monjalon
2023-01-24 14:00 ` Jiawei(Jonny) Wang
2022-12-21 10:29 ` [RFC 2/5] ethdev: introduce the affinity field in Tx queue API Jiawei Wang
2023-01-11 16:47 ` Ori Kam
2023-01-18 11:37 ` Thomas Monjalon [this message]
2023-01-18 14:44 ` Jiawei(Jonny) Wang
2023-01-18 16:31 ` Thomas Monjalon
2023-01-24 13:32 ` Jiawei(Jonny) Wang
2022-12-21 10:29 ` [RFC 3/5] drivers: add lag Rx port affinity in PRM Jiawei Wang
2022-12-21 10:29 ` [RFC 4/5] net/mlx5: add port affinity item support Jiawei Wang
2022-12-21 10:29 ` [RFC 5/5] drivers: enhance the Tx queue affinity Jiawei Wang
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