From: "lihuisong (C)" <lihuisong@huawei.com>
To: Ferruh Yigit <ferruh.yigit@amd.com>, <dev@dpdk.org>
Cc: <liuyonglong@huawei.com>, <thomas@monjalon.net>,
Chengwen Feng <fengchengwen@huawei.com>,
Dongdong Liu <liudongdong3@huawei.com>,
Jie Hai <haijie1@huawei.com>
Subject: Re: [PATCH v3 1/6] doc: add RSS hash algorithm feature
Date: Tue, 28 Nov 2023 20:46:47 +0800 [thread overview]
Message-ID: <f55fe655-37f8-9188-7b7b-12840826c51d@huawei.com> (raw)
In-Reply-To: <711da56d-cf6b-4bba-896f-c6df9e069d1e@amd.com>
在 2023/11/28 19:52, Ferruh Yigit 写道:
> On 11/28/2023 11:29 AM, lihuisong (C) wrote:
>> 在 2023/11/28 18:09, Ferruh Yigit 写道:
>>> On 11/28/2023 1:21 AM, lihuisong (C) wrote:
>>>> 在 2023/11/27 23:43, Ferruh Yigit 写道:
>>>>> On 11/27/2023 1:12 PM, lihuisong (C) wrote:
>>>>>> 在 2023/11/27 20:19, Ferruh Yigit 写道:
>>>>>>> On 11/25/2023 1:47 AM, Huisong Li wrote:
>>>>>>>> Add hash algorithm feature introduced by 23.11 and fix some RSS
>>>>>>>> features
>>>>>>>> description.
>>>>>>>>
>>>>>>>> Fixes: 34ff088cc241 ("ethdev: set and query RSS hash algorithm")
>>>>>>>>
>>>>>>>> Signed-off-by: Huisong Li <lihuisong@huawei.com>
>>>>>>>> Acked-by: Chengwen Feng <fengchengwen@huawei.com>
>>>>>>>> ---
>>>>>>>> doc/guides/nics/features.rst | 26 ++++++++++++++++++++++----
>>>>>>>> 1 file changed, 22 insertions(+), 4 deletions(-)
>>>>>>>>
>>>>>>>> diff --git a/doc/guides/nics/features.rst
>>>>>>>> b/doc/guides/nics/features.rst
>>>>>>>> index 1a1dc16c1e..0d38c5c525 100644
>>>>>>>> --- a/doc/guides/nics/features.rst
>>>>>>>> +++ b/doc/guides/nics/features.rst
>>>>>>>> @@ -277,10 +277,12 @@ RSS hash
>>>>>>>> Supports RSS hashing on RX.
>>>>>>>> * **[uses] user config**: ``dev_conf.rxmode.mq_mode`` =
>>>>>>>> ``RTE_ETH_MQ_RX_RSS_FLAG``.
>>>>>>>> -* **[uses] user config**: ``dev_conf.rx_adv_conf.rss_conf``.
>>>>>>>> +* **[uses] user config**: ``rss_conf.rss_hf``.
>>>>>>>>
>>>>>>> Feature title is "RSS hash", it can be two things,
>>>>>>> 1. "Receive Side Scaling" support
>>>>>>> 2. Provide RSS hash to application
>>>>>>>
>>>>>>> When this document first prepared RSS hash value was always
>>>>>>> provided to
>>>>>>> the application when RSS enabled.
>>>>>>> So intention with this feature was "Receive Side Scaling" support,
>>>>>>> hence
>>>>>>> 'RTE_ETH_MQ_RX_RSS_FLAG' added.
>>>>>>>
>>>>>>> Later providing RSS has to the application separated as optimization,
>>>>>>> 'RTE_ETH_RX_OFFLOAD_RSS_HASH' & 'RTE_MBUF_F_RX_RSS_HASH' added for
>>>>>>> this
>>>>>>> support.
>>>>>> What should I do for above two comments？
>>>>>> To tell application how to use it?
>>>>>>
>>>>> Just tried to give some context.
>>>> got it.
>>>>>
>>>>>>> As the intention of this feature is "Receive Side Scaling"
>>>>>>> support, we
>>>>>>> shouldn't reduce configuration struct to 'rss_conf.rss_hf'.
>>>>>>>
>>>>>>> Instead perhaps can expand to:
>>>>>>> 'rte_eth_conf.rx_adv_conf.rss_conf', 'rte_eth_rss_conf'
>>>>>> I just pick their common part.😁
>>>>>>
>>>>>> ok, will fix it.
>>>>>>
>>>>>>>> * **[uses] rte_eth_rxconf,rte_eth_rxmode**:
>>>>>>>> ``offloads:RTE_ETH_RX_OFFLOAD_RSS_HASH``.
>>>>>>>> * **[provides] rte_eth_dev_info**: ``flow_type_rss_offloads``.
>>>>>>>> * **[provides] mbuf**: ``mbuf.ol_flags:RTE_MBUF_F_RX_RSS_HASH``,
>>>>>>>> ``mbuf.rss``.
>>>>>>>> +* **[related] API**: ``rte_eth_dev_configure``,
>>>>>>>> ``rte_eth_dev_rss_hash_update``
>>>>>>>> + ``rte_eth_dev_rss_hash_conf_get()``.
>>>>>>>>
>>>>>>> ack
>>>>>>>
>>>>>>>> .. _nic_features_inner_rss:
>>>>>>>> @@ -288,7 +290,7 @@ Supports RSS hashing on RX.
>>>>>>>> Inner RSS
>>>>>>>> ---------
>>>>>>>> -Supports RX RSS hashing on Inner headers.
>>>>>>>> +Supports RX RSS hashing on Inner headers by rte_flow API.
>>>>>>>>
>>>>>>> This should be clarified with details below, not sure if it
>>>>>>> required to
>>>>>>> limit description to rte_flow.
>>>>>> But this block like rte_flow_action_rss is from rte_flow.
>>>>>> And ethdev ops doesn't support inner RSS.
>>>>>> So I think it is ok.
>>>>>>
>>>>> Yes it is supported by rte_flow, and '[uses]' information should
>>>>> already
>>>>> clarify it.
>>>> Should we remove the 'rte_flow API' wrods I added in above description?
>>>>
>>> I think it can be removed.
>> The latest version(V5, only three fix doc patch) has been sent out.
>> Do we I need to send V6 for this?😂
>>
> Nope, no new version needed for this, I already acked the one with it,
> but if there will be a new version this can be updated.
ok
> Thanks Huisong for improving the documentation.
Willing to contribute my strength to the community.😁
>
>>>
>>>>>>> And I guess similar confusion exist with the providing hash to user.
>>>>>>> Need to check if rte_flow implementation puts hash to mbuf along with
>>>>>>> doing the RSS, or if it checks 'RTE_ETH_RX_OFFLOAD_RSS_HASH' offload,
>>>>>>> and update below items accordingly.
>>>>>> Do we need to tell user how to use it here?
>>>>>> I feel this document is a little simple and main to list interface for
>>>>>> user.
>>>>>> In addition, it is better that the more detail about RSS should be
>>>>>> presented in rte_flow features.
>>>>>>
>>>>> No, I am not suggesting to add more detail.
>>>>>
>>>>> My concern is 'RTE_ETH_RX_OFFLOAD_RSS_HASH' information may not be
>>>>> correct, ethdev APIs checks offload flags, but does rte_flow
>>>>> implementation check it?
>>>> As far as I know, It is possibly verified in PMD if have or required.
>>>>> My suggestion is double check that piece of information and fix it if
>>>>> required.
>>>>>
>>>>>
>>>>>>>> * **[uses] rte_flow_action_rss**: ``level``.
>>>>>>>> * **[uses] rte_eth_rxconf,rte_eth_rxmode**:
>>>>>>>> ``offloads:RTE_ETH_RX_OFFLOAD_RSS_HASH``.
>>>>>>>> @@ -303,9 +305,25 @@ RSS key update
>>>>>>>> Supports configuration of Receive Side Scaling (RSS) hash
>>>>>>>> computation. Updating
>>>>>>>> Receive Side Scaling (RSS) hash key.
>>>>>>>> -* **[implements] eth_dev_ops**: ``rss_hash_update``,
>>>>>>>> ``rss_hash_conf_get``.
>>>>>>>> +* **[implements] eth_dev_ops**: ``dev_configure``,
>>>>>>>> ``rss_hash_update``, ``rss_hash_conf_get``.
>>>>>>>> +* **[uses] user config**: ``rss_conf.rss_key``,
>>>>>>>> ``rss_conf.rss_key_len``
>>>>>>>> * **[provides] rte_eth_dev_info**: ``hash_key_size``.
>>>>>>>> -* **[related] API**: ``rte_eth_dev_rss_hash_update()``,
>>>>>>>> +* **[related] API**: ``rte_eth_dev_configure``,
>>>>>>>> ``rte_eth_dev_rss_hash_update()``,
>>>>>>>> + ``rte_eth_dev_rss_hash_conf_get()``.
>>>>>>>> +
>>>>>>> ack
>>>>>>>
>>>>>>> There is an inconsistency in the documentation but I think it is
>>>>>>> good to
>>>>>>> use '()' when documenting API, like: 'rte_eth_dev_configure()'
>>>>>> +1 will fix it.
>>>>>>>> +
>>>>>>>> +.. _nic_features_rss_hash_algo_update:
>>>>>>>> +
>>>>>>>> +RSS hash algorithm update
>>>>>>>> +-------------------------
>>>>>>>> +
>>>>>>>> +Supports configuration of Receive Side Scaling (RSS) hash
>>>>>>>> algorithm.
>>>>>>>> Updating
>>>>>>>> +RSS hash algorithm.
>>>>>>>> +
>>>>>>>> +* **[implements] eth_dev_ops**: ``dev_configure``,
>>>>>>>> ``rss_hash_update``, ``rss_hash_conf_get``.
>>>>>>>> +* **[uses] user config**: ``rss_conf.algorithm``
>>>>>>>> +* **[provides] rte_eth_dev_info**: ``rss_algo_capa``.
>>>>>>>> +* **[related] API**: ``rte_eth_dev_configure``,
>>>>>>>> ``rte_eth_dev_rss_hash_update()``,
>>>>>>>> ``rte_eth_dev_rss_hash_conf_get()``.
>>>>>>>>
>>>>>>> This document describes features listed in the 'default.ini', so we
>>>>>>> shouldn't have above.
>>>>>>>
>>>>>>> And I don't think RSS hash algorithm update is a big enough
>>>>>>> feature to
>>>>>>> list in the feature list, perhaps it can be embedded in the RSS
>>>>>>> support
>>>>>>> block, what do you think?
>>>>>> Yes it is not a bit feature.
>>>>>> so put it to RSS hash, right?
>>>>>>
>>>>> Yes please.
>>>>>
>>>>> .
>>> .
> .
next prev parent reply other threads:[~2023-11-28 12:46 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-23 13:59 [PATCH 0/5] doc/features: fix some features and add new features Huisong Li
2023-11-23 13:59 ` [PATCH 1/5] doc/features: add RSS hash algorithm feature Huisong Li
2023-11-23 13:59 ` [PATCH 2/5] doc/features: add link up/down feature Huisong Li
2023-11-23 13:59 ` [PATCH 3/5] doc/features: add config interface for speed capabilities Huisong Li
2023-11-23 13:59 ` [PATCH 4/5] doc/features: add Traffic Manager features Huisong Li
2023-11-23 13:59 ` [PATCH 5/5] doc/features: add dump device private information feature Huisong Li
2023-11-23 14:18 ` Thomas Monjalon
2023-11-24 2:03 ` lihuisong (C)
2023-11-24 3:12 ` [PATCH 0/6] doc/features: fix some features and add new features Huisong Li
2023-11-24 3:12 ` [PATCH 1/6] doc/features: add RSS hash algorithm feature Huisong Li
2023-11-24 3:12 ` [PATCH 2/6] doc/features: add link up/down feature Huisong Li
2023-11-24 3:12 ` [PATCH 3/6] doc/features: add features for link speeds Huisong Li
2023-11-24 3:12 ` [PATCH 4/6] doc/features: add Traffic Manager features Huisong Li
2023-11-24 3:12 ` [PATCH 5/6] doc/features: add dump device private information feature Huisong Li
2023-11-24 3:12 ` [PATCH 6/6] doc/features: add feature for loopback mode Huisong Li
2023-11-24 3:24 ` [PATCH 0/6] doc/features: fix some features and add new features fengchengwen
2023-11-25 1:47 ` [PATCH v3 " Huisong Li
2023-11-25 1:47 ` [PATCH v3 1/6] doc: add RSS hash algorithm feature Huisong Li
2023-11-27 12:19 ` Ferruh Yigit
2023-11-27 13:12 ` lihuisong (C)
2023-11-27 15:43 ` Ferruh Yigit
2023-11-27 16:35 ` Ferruh Yigit
2023-11-28 1:34 ` lihuisong (C)
2023-11-28 10:23 ` Ferruh Yigit
2023-11-28 1:21 ` lihuisong (C)
2023-11-28 10:09 ` Ferruh Yigit
2023-11-28 11:29 ` lihuisong (C)
2023-11-28 11:52 ` Ferruh Yigit
2023-11-28 12:46 ` lihuisong (C) [this message]
2023-11-25 1:47 ` [PATCH v3 2/6] doc: add link up/down feature Huisong Li
2023-11-27 12:24 ` Ferruh Yigit
2023-11-27 13:16 ` lihuisong (C)
2023-11-25 1:47 ` [PATCH v3 3/6] doc: add features for link speeds Huisong Li
2023-11-25 1:47 ` [PATCH v3 4/6] doc: add Traffic Manager feature Huisong Li
2023-11-25 1:47 ` [PATCH v3 5/6] doc: add dump device private information feature Huisong Li
2023-11-25 1:47 ` [PATCH v3 6/6] doc: add feature for loopback mode Huisong Li
2023-11-27 12:35 ` [PATCH v3 0/6] doc/features: fix some features and add new features Ferruh Yigit
2023-11-27 13:37 ` lihuisong (C)
2023-11-27 16:19 ` Ferruh Yigit
2023-11-27 14:16 ` [PATCH v4 0/5] " Huisong Li
2023-11-27 14:16 ` [PATCH v4 1/5] doc: fix the description of RSS related feature Huisong Li
2023-11-27 16:36 ` Ferruh Yigit
2023-11-27 14:16 ` [PATCH v4 2/5] doc: add link up/down feature Huisong Li
2023-11-27 14:16 ` [PATCH v4 3/5] doc: add features for link speeds Huisong Li
2023-11-27 14:16 ` [PATCH v4 4/5] doc: add Traffic Manager feature Huisong Li
2023-11-27 14:16 ` [PATCH v4 5/5] doc: add dump device private information ops Huisong Li
2023-11-27 16:37 ` Ferruh Yigit
2023-11-27 16:44 ` [PATCH v4 0/5] doc/features: fix some features and add new features Ferruh Yigit
2023-11-28 2:09 ` lihuisong (C)
2023-11-28 4:07 ` lihuisong (C)
2023-11-27 16:56 ` Ferruh Yigit
2023-11-28 2:23 ` lihuisong (C)
2023-11-28 5:59 ` [PATCH v5 0/3] " Huisong Li
2023-11-28 5:59 ` [PATCH v5 1/3] doc: fix the description of RSS related feature Huisong Li
2023-11-28 13:54 ` Thomas Monjalon
2023-11-28 5:59 ` [PATCH v5 2/3] doc: add link up/down feature Huisong Li
2023-11-28 5:59 ` [PATCH v5 3/3] doc: add dump device private information ops Huisong Li
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f55fe655-37f8-9188-7b7b-12840826c51d@huawei.com \
--to=lihuisong@huawei.com \
--cc=dev@dpdk.org \
--cc=fengchengwen@huawei.com \
--cc=ferruh.yigit@amd.com \
--cc=haijie1@huawei.com \
--cc=liudongdong3@huawei.com \
--cc=liuyonglong@huawei.com \
--cc=thomas@monjalon.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).