From: Andrew Rybchenko <arybchenko@solarflare.com>
To: Ori Kam <orika@nvidia.com>, Ori Kam <orika@mellanox.com>,
NBU-Contact-Thomas Monjalon <thomas@monjalon.net>,
"david.marchand@redhat.com" <david.marchand@redhat.com>,
John McNamara <john.mcnamara@intel.com>,
Marko Kovacevic <marko.kovacevic@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v3] doc: update RSS action with best effort
Date: Mon, 10 Aug 2020 12:53:38 +0300 [thread overview]
Message-ID: <f359d125-17b1-a88f-5aa2-ce8d03743be8@solarflare.com> (raw)
In-Reply-To: <MN2PR12MB42860F499B4ADF8968168B60D6440@MN2PR12MB4286.namprd12.prod.outlook.com>
On 8/10/20 10:40 AM, Ori Kam wrote:
> Hi Andrew,
>
>
>> -----Original Message-----
>> From: Andrew Rybchenko <arybchenko@solarflare.com>
>>
>> On 8/7/20 8:02 AM, Ori Kam wrote:
>>> Using the rte_flow action RSS types field,
>>> may result in undefined outcome.
>>>
>>> For example selecting both UDP and TCP,
>>> selecting TCP RSS type but the pattern is targeting UDP traffic.
>>> another option is that the PMD doesn't support all requested types.
>>>
>>> Until now, it wasn't clear what will happen in such cases.
>>> This commit clarify this issue by stating that the PMD
>>> will work in the best-effort mode, and will fail
>>> in case the requested type is not supported.
>>>
>>> Signed-off-by: Ori Kam <orika@mellanox.com>
>>> ---
>>> v3:
>>> * Address ML comments.
>>>
>>> v2:
>>> * Address ML comments.
>>> ---
>>> doc/guides/prog_guide/rte_flow.rst | 12 ++++++++++++
>>> 1 file changed, 12 insertions(+)
>>>
>>> diff --git a/doc/guides/prog_guide/rte_flow.rst
>> b/doc/guides/prog_guide/rte_flow.rst
>>> index 3e5cd1e..eada283 100644
>>> --- a/doc/guides/prog_guide/rte_flow.rst
>>> +++ b/doc/guides/prog_guide/rte_flow.rst
>>> @@ -1735,6 +1735,18 @@ unspecified "best-effort" settings from the
>> underlying PMD, which depending
>>> on the flow rule, may result in anything ranging from empty (single queue)
>>> to all-inclusive RSS.
>>>
>>> +In case there are Non-applicable RSS types in the rule,
>>> +Best effort will be used.
>>> +This may be the result of:
>>> +
>>> +- Setting both UDP and TCP on the same rule.
>>> +
>>> +- Setting RSS types that don't match the requested pattern,
>>> + for example, matching on UDP and hashing RSS on TCP.
>>> +
>>> +If requested RSS hash type is not supported in ``dev_info``.
>>> +The flow creation will fail.
>>> +
>> Consider:
>> If non-applicable for matching packets RSS types are requested,
>> these RSS types are simply ignored. For example, it happens if:
>>
>> - Hashing of both TCP and UDP ports is requested
>> (only one can present in a packet).
>>
>> - Requested RSS types contradict to flow rule pattern
>> (e.g. pattern has UDP item, but RSS types contain TCP).
>>
>> If requested RSS types are not supported by the Ethernet device
>> at all (not reported in ``dev_info.flow_type_rss_offloads``),
>> the flow creation will fail.
>>
> Sure sounds good, but since this is just copying your words,
> I will add your Signed-off-by to this patch, is that O.K?
OK
>>> Note: RSS hash result is stored in the ``hash.rss`` mbuf field which
>>> overlaps ``hash.fdir.lo``. Since `Action: MARK`_ sets the ``hash.fdir.hi``
>>> field only, both can be requested simultaneously.
>>>
next prev parent reply other threads:[~2020-08-10 9:53 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-03 14:28 [dpdk-dev] [PATCH] " Ori Kam
2020-08-03 14:33 ` Andrew Rybchenko
2020-08-03 15:22 ` Ori Kam
2020-08-03 15:33 ` Andrew Rybchenko
2020-08-03 15:47 ` Ori Kam
2020-08-03 16:03 ` Andrew Rybchenko
2020-08-03 16:53 ` Ori Kam
2020-08-03 15:40 ` David Marchand
2020-08-03 15:49 ` Ori Kam
2020-08-03 15:55 ` Andrew Rybchenko
2020-08-03 16:12 ` Thomas Monjalon
2020-09-14 14:29 ` Ferruh Yigit
2020-08-04 8:13 ` [dpdk-dev] [PATCH v2] " Ori Kam
2020-08-05 12:39 ` Ori Kam
2020-08-05 13:39 ` Andrew Rybchenko
2020-08-05 14:08 ` Ori Kam
2020-08-06 12:14 ` Andrew Rybchenko
2020-08-06 16:55 ` Ori Kam
2020-09-14 14:38 ` Ferruh Yigit
2020-08-07 5:02 ` [dpdk-dev] [PATCH v3] " Ori Kam
2020-08-07 9:41 ` Andrew Rybchenko
2020-08-10 7:40 ` Ori Kam
2020-08-10 9:53 ` Andrew Rybchenko [this message]
2020-08-10 15:08 ` [dpdk-dev] [PATCH v4] " Ori Kam
2020-09-14 14:43 ` Ferruh Yigit
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=f359d125-17b1-a88f-5aa2-ce8d03743be8@solarflare.com \
--to=arybchenko@solarflare.com \
--cc=david.marchand@redhat.com \
--cc=dev@dpdk.org \
--cc=john.mcnamara@intel.com \
--cc=marko.kovacevic@intel.com \
--cc=orika@mellanox.com \
--cc=orika@nvidia.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).