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: Mon, 27 Nov 2023 21:12:13 +0800 [thread overview]
Message-ID: <89b73632-8a7a-e54c-2957-04c347027c2e@huawei.com> (raw)
In-Reply-To: <aa715eaa-bc94-4a26-acc8-38f927ca54ec@amd.com>
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?
>
> 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.
>
>
> 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.
>
>
>> * **[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?
>
>
> .
next prev parent reply other threads:[~2023-11-27 13:12 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) [this message]
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)
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
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