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From: oulijun <oulijun@huawei.com>
To: Ophir Munk <ophirmu@nvidia.com>,
	Ferruh Yigit <ferruh.yigit@intel.com>,
	"wenzhuo.lu@intel.com" <wenzhuo.lu@intel.com>,
	"beilei.xing@intel.com" <beilei.xing@intel.com>,
	NBU-Contact-Adrien Mazarguil <adrien.mazarguil@6wind.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
	"linuxarm@huawei.com" <linuxarm@huawei.com>,
	Ori Kam <orika@nvidia.com>
Subject: Re: [dpdk-dev] [PATCH v5] app/testpmd: fix the default RSS key configuration
Date: Fri, 16 Oct 2020 18:05:32 +0800
Message-ID: <21dfaee9-0a63-c154-779a-c932715ae6dd@huawei.com> (raw)
In-Reply-To: <DM5PR12MB11615D226BE211FDD30A613ADC030@DM5PR12MB1161.namprd12.prod.outlook.com>



在 2020/10/16 14:46, Ophir Munk 写道:
> 
> 
>> -----Original Message-----
>> From: Ferruh Yigit <ferruh.yigit@intel.com>
> <..>
>>>>
>>>
>>> Ferruh, your suggestion ([1] + update) looks correct. I also verified it on
>> mlx5 PMD.
>>> Advantage: it's a generic fix for all dpdk applications using rte_flows (not
>> just testpmd).
>>> It reduces code.
>>> With this fix the responsibility of handling key==NULL and/or len==0 is
>> moved to the PMDs (which is good).
>>>
>>> With regard to Lijun patch - I liked the approach of overriding the default
>> testpmd key with the default PMD key.
>>> But it only addresses testpmd. More code was added.
>>> It seems OK to call rte_eth_dev_rss_hash_conf_get() as part of parsing
>> RSS, but it would feel more confident if we could confirm it for all the PMDs
>> (by testing) or at least review the PMDs rss_hash_conf_get()
>> implementations.
>>>
>>
>> Lijun's idea can work. There was a problem in implementation related to the
>> key size assumption, which can be fixed.
>>
>> Even it is fixed, when user gives a rss rule without a key, we are getting key
>> from device and feeding same key back to device, this is unnecessary I think.
> 
> I agree.
> 
>> When user didn't provide a key, rss rule shouldn't touch the key at all.
> 
> Agreed as well.
> 
>> Complication was when user provides key_len without a key, I think both
>> ignoring or returning error in this case is OK.
> 
> I think that in general flow rules should arrive "as is" to the PMD which has its
> validation and translation APIs to handle all cases.
> 
Do you agree with [1] + Ferruh update solution?

  reply index

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-10  1:51 [dpdk-dev] [PATCH v3] " Lijun Ou
2020-09-22  9:51 ` Phil Yang
2020-09-22 13:50   ` oulijun
2020-09-22 15:44     ` Phil Yang
2020-09-24 13:45 ` [dpdk-dev] [PATCH v4] RSS key use with testpmd Lijun Ou
2020-09-24 13:45   ` [dpdk-dev] [PATCH v4] app/testpmd: fix the default RSS key configuration Lijun Ou
2020-09-29 15:35     ` Phil Yang
2020-09-30 12:57     ` Ferruh Yigit
2020-10-09 11:55       ` oulijun
2020-10-09 18:27         ` Ferruh Yigit
2020-10-09 18:54           ` Ferruh Yigit
2020-09-30 13:36     ` Ferruh Yigit
2020-10-09 11:59       ` oulijun
2020-10-09 18:36         ` Ferruh Yigit
2020-10-15 12:41     ` [dpdk-dev] [PATCH v5] " Lijun Ou
2020-10-15 13:52       ` Ferruh Yigit
2020-10-15 14:04         ` oulijun
2020-10-15 14:43           ` Ferruh Yigit
2020-10-15 16:05             ` Ferruh Yigit
2020-10-15 23:21               ` Ophir Munk
2020-10-15 23:53                 ` Ferruh Yigit
2020-10-16  0:14                   ` Ajit Khaparde
2020-10-16  6:46                   ` Ophir Munk
2020-10-16 10:05                     ` oulijun [this message]
2020-10-16 15:13                       ` Ophir Munk
2020-10-16 10:04                   ` oulijun
2020-10-16 10:57                     ` Ferruh Yigit
2020-10-16 14:59                       ` Ophir Munk
2020-10-20  9:00                       ` oulijun
2020-10-20 10:02                         ` Ferruh Yigit
2020-10-20 13:35                           ` oulijun
2020-10-20 14:34                             ` Ferruh Yigit
2020-10-21  8:19                               ` oulijun
2020-10-21  9:38                                 ` Ferruh Yigit
2020-10-21 10:07                                   ` oulijun
     [not found]       ` <20201015195637.26476-1-robot@bytheb.org>
2020-10-16  9:39         ` [dpdk-dev] |WARNING| pw80899 " oulijun
2020-10-16  9:41           ` David Marchand
2020-09-30 13:17   ` [dpdk-dev] [PATCH v4] RSS key use with testpmd Ferruh Yigit
2020-10-09 12:09     ` oulijun
2020-10-09 18:52       ` Ferruh Yigit
2020-10-10  3:07         ` Phil Yang
2020-10-14  6:15         ` oulijun
2020-10-14  8:41           ` Ferruh Yigit
2020-10-15 12:30 [dpdk-dev] [PATCH v5] app/testpmd: fix the default RSS key configuration Lijun Ou

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