From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Shahaf Shuler <shahafs@mellanox.com>, dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] doc: announce ABI change on ethdev
Date: Tue, 9 May 2017 14:49:25 +0100 [thread overview]
Message-ID: <1d625f78-e6e4-c4c3-9775-e5c59666e5fa@intel.com> (raw)
In-Reply-To: <20170501065812.5185-1-shahafs@mellanox.com>
On 5/1/2017 7:58 AM, Shahaf Shuler wrote:
> This is an ABI change notice for DPDK 17.08 in librte_ether
> about changes in rte_eth_txmode structure.
>
> Currently Tx offloads are enabled by default, and can be disabled
> using ETH_TXQ_FLAGS_NO* flags. This behaviour is not consistent with
> the Rx side where the Rx offloads are disabled by default and enabled
> according to bit field in rte_eth_rxmode structure.
>
> The proposal is to disable the Tx offloads by default, and provide
> a way for the application to enable them in rte_eth_txmode structure.
> Besides of making the Tx configuration API more consistent for
> applications, PMDs will be able to provide a better out of the
> box performance.
> Finally, as part of the work, the ETH_TXQ_FLAGS_NO* will
> be superseded as well.
>
> Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
> ---
> looks like this patch has arrived to everyone
> besides dev@dpdk.org resending it again. sorry for
> the noise.
> ---
> doc/guides/rel_notes/deprecation.rst | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
> index a3e7c720c..0920b4766 100644
> --- a/doc/guides/rel_notes/deprecation.rst
> +++ b/doc/guides/rel_notes/deprecation.rst
> @@ -81,3 +81,11 @@ Deprecation Notices
>
> - ``rte_crpytodev_scheduler_mode_get``, replaced by ``rte_cryptodev_scheduler_mode_get``
> - ``rte_crpytodev_scheduler_mode_set``, replaced by ``rte_cryptodev_scheduler_mode_set``
> +
> +* ethdev: in 17.08 ABI changes are planned:
> + Tx offloads will no longer be enabled by default.
> + Instead, the ``rte_eth_txmode`` structure will be extended with bit field to enable
> + each Tx offload.
> + Besides of making the Rx/Tx configuration API more consistent for the
> + application, PMDs will be able to provide a better out of the box performance.
I understand the consistency part, but why PMD performs better when Tx
offload disabled?
> + as part of the work, ``ETH_TXQ_FLAGS_NO*`` will be superseded as well.
>
next prev parent reply other threads:[~2017-05-09 13:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-01 6:58 Shahaf Shuler
2017-05-09 10:24 ` Shahaf Shuler
2017-05-09 13:40 ` Adrien Mazarguil
2017-05-09 17:04 ` Jerin Jacob
2017-05-10 23:17 ` Thomas Monjalon
2017-05-09 13:49 ` Ferruh Yigit [this message]
2017-05-09 16:55 ` Shahaf Shuler
2017-05-09 18:09 ` Ananyev, Konstantin
2017-05-10 14:29 ` Bruce Richardson
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