[dpdk-dev] [PATCH v4] RSS key use with testpmd
Ferruh Yigit
ferruh.yigit at intel.com
Wed Oct 14 10:41:37 CEST 2020
On 10/14/2020 7:15 AM, oulijun wrote:
>
>
> 在 2020/10/10 2:52, Ferruh Yigit 写道:
>> 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?
>>
> Hi,Ferruh
> Your opinion is to put the following comit log in app/testpmd: fix the
> default RSS key configuration?
> 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
>
Above description and this sample please? Thanks.
>>>> 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(+)
>>>>>
>>>>
>>>> .
>>>>
>>
>> .
>>
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