DPDK patches and discussions
 help / color / Atom feed
From: Ferruh Yigit <ferruh.yigit@intel.com>
To: oulijun <oulijun@huawei.com>,
	wenzhuo.lu@intel.com, beilei.xing@intel.com,
	adrien.mazarguil@6wind.com, Phil Yang <Phil.Yang@arm.com>
Cc: dev@dpdk.org, linuxarm@huawei.com
Subject: Re: [dpdk-dev] [PATCH v4] RSS key use with testpmd
Date: Fri, 9 Oct 2020 19:52:47 +0100
Message-ID: <46956bf5-54ff-c8b6-74de-a6338c6d5d3a@intel.com> (raw)
In-Reply-To: <f14ffcce-bb9a-d528-37fa-c66c6c7833d3@huawei.com>

On 10/9/2020 1:09 PM, oulijun wrote:
> 
> 
> 在 2020/9/30 21:17, Ferruh Yigit 写道:
>> On 9/24/2020 2:45 PM, Lijun Ou wrote:
>>> Consider the follow usage with testpmd:
>>> 1. first, startup testpmd:
>>> testpmd> show port 0 rss-hash key
>>> RSS functions:
>>>   all ipv4-frag ipv4-other ipv6-frag ipv6-other ip
>>> RSS key:
>>> 6D5A56DA255B0EC24167253D43A38FB0D0CA2BCBAE7B30B477CB2DA38030F
>>> 20C6A42B73BBEAC01FA
>>> 2. create a rss rule
>>> testpmd> flow create 0 ingress pattern eth / ipv4 / udp / end actions rss \
>>> types ipv4-udp end queues end / end
>>>
>>> 3. show rss-hash key
>>> testpmd> show port 0 rss-hash key
>>> RSS functions:
>>>   all ipv4-udp udp
>>> RSS key:
>>> 74657374706D6427732064656661756C74205253532068617368206B65792C206F
>>> 76657272696465
>>>
>>> As a result, the step 3 with RSS key and the step 1 RSS key
>>> is not the same. The patch[1] to solve the above problems.
>>>
>>
>> This is interesting, can you please provide above information in the commit 
>> log too?
>>
> Yes, I submitted detailed operation information in patch v3 as a commit, and 
> Yang suggested that the operation information be included in the cover letter.
 >

OK, understood.
Only, commands helped me to understand the problem, it is easy to grasp the 
issue with samples, so I thought it may help others later in if it is in the 
commit log, since cover letter won't be visible in the git repo.

@Phil, will you be OK to have them in the commit log if the checkpatch warnings 
fixed?

>> Also can you please provide the details on why this happens, callstack can help?
>>
> When you start the testpmd, the pmd driver initializes the RSS configuration. 
> Generally, the recommended RSS hash key is used as the default key in the 
> driver. In addition, the default key is different from the default RSS flow in 
> testpmd without specifying RSS hash key.
> So, if you do not specify the RSS key when creating an RSS rule, the testpmd 
> uses the default key as the default RSS key of the RSS rule.As a result, you may 
> mistakenly consider that the RSS key in use is the valid default key of the NIC, 
> actually, the key and the valid default key of the NIC are two values.

Above description looks good, can you include this to the commit log please?

>> Thanks,
>> ferruh
>>
>>
>>> Lijun Ou (1):
>>>    app/testpmd: fix the default RSS key configuration
>>>
>>>   app/test-pmd/cmdline_flow.c | 8 ++++++++
>>>   1 file changed, 8 insertions(+)
>>>
>>
>> .
>>


  reply index

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-10  1:51 [dpdk-dev] [PATCH v3] app/testpmd: fix the default RSS key configuration 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
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 [this message]
2020-10-10  3:07         ` Phil Yang
2020-10-14  6:15         ` oulijun
2020-10-14  8:41           ` Ferruh Yigit

Reply instructions:

You may reply publically 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=46956bf5-54ff-c8b6-74de-a6338c6d5d3a@intel.com \
    --to=ferruh.yigit@intel.com \
    --cc=Phil.Yang@arm.com \
    --cc=adrien.mazarguil@6wind.com \
    --cc=beilei.xing@intel.com \
    --cc=dev@dpdk.org \
    --cc=linuxarm@huawei.com \
    --cc=oulijun@huawei.com \
    --cc=wenzhuo.lu@intel.com \
    /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

DPDK patches and discussions

Archives are clonable:
	git clone --mirror http://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ http://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev


Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/ public-inbox