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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Chengchang Tang <tangchengchang@huawei.com>, dev@dpdk.org
Cc: linuxarm@huawei.com, chas3@att.com, humin29@huawei.com
Subject: Re: [dpdk-dev] [RFC 0/2] add Tx prepare support for bonding device
Date: Tue, 20 Apr 2021 02:26:39 +0100
Message-ID: <58a7abc3-0906-57f2-5fd3-7e875b6f4c1e@intel.com> (raw)
In-Reply-To: <1618571071-5927-1-git-send-email-tangchengchang@huawei.com>

On 4/16/2021 12:04 PM, Chengchang Tang wrote:
> This patch add Tx prepare for bonding device.
> 
> Currently, the bonding driver has not implemented the callback of
> rte_eth_tx_prepare function. Therefore, the TX prepare function of the
> slave devices will never be invoked. When hardware offloading such as
> CKSUM and TSO are enabled for some drivers, tx_prepare needs to be used
> to adjust packets (for example, set correct pseudo packet headers).
> Otherwise, related offloading fails and even packets are sent
> incorrectly. Due to this limitation, the bonded device cannot use these
> HW offloading in the Tx direction.
> 
> Because packet sending algorithms are numerous and complex in bond PMD,
> it is hard to design the callback for rte_eth_tx_prepare. In this patch,
> the tx_prepare callback of bonding PMD is not implemented. Instead,
> rte_eth_tx_prepare has been called in tx_burst callback. And a global
> variable is introduced to control whether the bonded device need call
> the rte_eth_tx_prepare. If upper-layer users need to use some TX
> offloading that depend on tx_prepare , they should enable the preparation
> function. In this way, the bonded device will call the rte_eth_tx_prepare
> for the fast path packets in the tx_burst callback.
> 

What do you think to add a devarg to bonding PMD to control the tx_prepare?
It won't be as dynamic as API, since it can be possible to change the behavior 
after application is started with API, but do we really need this?

> Chengchang Tang (2):
>    net/bonding: add Tx prepare for bonding
>    app/testpmd: add cmd for bonding Tx prepare
> 
>   app/test-pmd/cmdline.c                      | 66 +++++++++++++++++++++++++++++
>   doc/guides/testpmd_app_ug/testpmd_funcs.rst |  9 ++++
>   drivers/net/bonding/eth_bond_private.h      |  1 +
>   drivers/net/bonding/rte_eth_bond.h          | 29 +++++++++++++
>   drivers/net/bonding/rte_eth_bond_api.c      | 28 ++++++++++++
>   drivers/net/bonding/rte_eth_bond_pmd.c      | 33 +++++++++++++--
>   drivers/net/bonding/version.map             |  5 +++
>   7 files changed, 167 insertions(+), 4 deletions(-)
> 
> --
> 2.7.4
> 


  parent reply	other threads:[~2021-04-20  1:26 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-16 11:04 Chengchang Tang
2021-04-16 11:04 ` [dpdk-dev] [RFC 1/2] net/bonding: add Tx prepare for bonding Chengchang Tang
2021-04-16 11:04 ` [dpdk-dev] [RFC 2/2] app/testpmd: add cmd for bonding Tx prepare Chengchang Tang
2021-04-16 11:12 ` [dpdk-dev] [RFC 0/2] add Tx prepare support for bonding device Min Hu (Connor)
2021-04-20  1:26 ` Ferruh Yigit [this message]
2021-04-20  2:44   ` Chengchang Tang
2021-04-20  8:33     ` Ananyev, Konstantin
2021-04-20 12:44       ` Chengchang Tang
2021-04-20 13:18         ` Ananyev, Konstantin
2021-04-20 14:06           ` Chengchang Tang
2021-04-23  9:46 ` [dpdk-dev] [PATCH " Chengchang Tang
2021-04-23  9:46   ` [dpdk-dev] [PATCH 1/2] net/bonding: support Tx prepare for bonding Chengchang Tang
2021-06-08  9:49     ` Andrew Rybchenko
2021-06-09  6:42       ` Chengchang Tang
2021-06-09  9:35         ` Andrew Rybchenko
2021-06-10  7:32           ` Chengchang Tang
2021-06-14 14:16             ` Andrew Rybchenko
2021-06-09 10:25         ` Ananyev, Konstantin
2021-06-10  6:46           ` Chengchang Tang
2021-06-14 11:36             ` Ananyev, Konstantin
2021-04-23  9:46   ` [dpdk-dev] [PATCH 2/2] net/bonding: support configuring Tx offloading " Chengchang Tang
2021-06-08  9:49     ` Andrew Rybchenko
2021-06-09  6:57       ` Chengchang Tang
2021-06-09  9:11         ` Ananyev, Konstantin
2021-06-09  9:37           ` Andrew Rybchenko
2021-06-10  6:29             ` Chengchang Tang
2021-06-14 11:05               ` Ananyev, Konstantin
2021-06-14 14:13                 ` Andrew Rybchenko
2021-04-30  6:26   ` [dpdk-dev] [PATCH 0/2] add Tx prepare support for bonding device Chengchang Tang
2021-04-30  6:47     ` Min Hu (Connor)
2021-06-03  1:44   ` Chengchang Tang

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