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From: Adrien Mazarguil <adrien.mazarguil@6wind.com>
To: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 01/12] ethdev: add API to query what/if packet type is set
Date: Wed, 6 Jan 2016 11:00:53 +0100	[thread overview]
Message-ID: <20160106100053.GJ12095@6wind.com> (raw)
In-Reply-To: <2601191342CEEE43887BDE71AB97725836AE18E3@irsmsx105.ger.corp.intel.com>

On Tue, Jan 05, 2016 at 04:50:31PM +0000, Ananyev, Konstantin wrote:
[...]
> > -----Original Message-----
> > From: Nélio Laranjeiro [mailto:nelio.laranjeiro@6wind.com]
[...]
> > I think we miss a comment here in how those 2/6/4 values are chosen
> > because, according to the mask, I expect 16 possibilities but I get
> > less.  It will help a lot anyone who needs to add a new type.
> > 
> > Extending the snprintf behavior above, it is best to remove the mask
> > argument altogether and have rte_eth_dev_get_ptype_info() return the
> > entire list every time.  Applications need to iterate on the result in
> > any case.
> 
> I think we'd better keep mask argument.
> In many cases upper layer only interested in some particular  subset of
> all packet types that HW can recognise.
> Let say l3fwd only cares about  RTE_PTYPE_L3_MASK, it is not interested in L4,
> tunnelling packet types, etc.
> If caller needs to know all recognised ptypes, he can set mask==-1,
> In that case all supported packet types will be returned.

There are other drawbacks to the mask argument in my opinion. The API will
have to be updated again as soon as 32 bits aren't enough to represent all
possible masks. We can't predict it will be large enough forever but on the
other hand, using uint64_t seems overkill at this point.

I think this use for masks should be avoided when performance does not
matter much, as in this case, user application cannot know the number of
entries in advance and must rely on the returned value to iterate.

A helper function can be added to convert a RTE_PTYPE_* value to the layer
it belongs to (using enum to define possible values).

If we absolutely want a mean to filter returned values, I suggest we use
this enum instead of the mask argument. Since it won't be a mask, it won't
have to be updated every time a new protocol requires extending one.

> >   rte_eth_dev_get_ptype_info(uint8_t port_id, uint32_t ptypes[],
> >                              size_t max_entries)
> > 
> > 
> > 
> > Another point, I have read the example patch (l3fwd) but I don't
> > understand why the PMD is not responsible for filling the packet type in
> > the MBUF (packet parsing is done by parse_packet_type()).  Why the extra
> > computation?
> 
> As I understand there are 3 possibilities now:
> 1. HW supports ptype recognition and SW ptype parsing is never done
> (--parse-ptype is not specified).
> 2. HW supports ptype recognition, but and SW ptype parsing is done anyway
> (--parse-ptype is specified).
> 3. HW doesn't support and ptype recognition, and and SW ptype parsing is done
> (--parse-ptype is specified).
> 
> I suppose the question is what for introduce '--parse-ptype' at all?
> My thought because of #2, so people can easily check what will be the performance impact of SW parsing. 
> 
> Konstantin
> 
> > 
> > I see it more like an offload request (as checksum, etc...) and if the
> > NIC does not support it then the application does the necessary overload.
> > 
> > Best regards,
> > 
> > --
> > Nélio Laranjeiro
> > 6WIND

-- 
Adrien Mazarguil
6WIND

  reply	other threads:[~2016-01-06 10:01 UTC|newest]

Thread overview: 202+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-31  6:53 [dpdk-dev] [PATCH 00/12] Add API to get packet type info Jianfeng Tan
2015-12-31  6:53 ` [dpdk-dev] [PATCH 01/12] ethdev: add API to query what/if packet type is set Jianfeng Tan
2016-01-04 11:38   ` Adrien Mazarguil
2016-01-04 14:36     ` Ananyev, Konstantin
2016-01-05 16:14       ` Nélio Laranjeiro
2016-01-05 16:50         ` Ananyev, Konstantin
2016-01-06 10:00           ` Adrien Mazarguil [this message]
2016-01-06 14:29             ` Ananyev, Konstantin
2016-01-06 15:44               ` Adrien Mazarguil
2016-01-06 16:44                 ` Ananyev, Konstantin
2016-01-06 17:22                   ` Adrien Mazarguil
2016-01-07 10:24                     ` Ananyev, Konstantin
2016-01-07 13:32                       ` Adrien Mazarguil
2016-01-11  7:39                         ` Tan, Jianfeng
2016-01-11 10:26                           ` Ananyev, Konstantin
2015-12-31  6:53 ` [dpdk-dev] [PATCH 02/12] pmd/cxgbe: add dev_ptype_info_get implementation Jianfeng Tan
2016-01-06  7:11   ` Rahul Lakkireddy
2016-01-06  8:23     ` Tan, Jianfeng
2015-12-31  6:53 ` [dpdk-dev] [PATCH 03/12] pmd/e1000: " Jianfeng Tan
2015-12-31  6:53 ` [dpdk-dev] [PATCH 04/12] pmd/enic: " Jianfeng Tan
2015-12-31  6:53 ` [dpdk-dev] [PATCH 05/12] pmd/fm10k: " Jianfeng Tan
2015-12-31  6:53 ` [dpdk-dev] [PATCH 06/12] pmd/i40e: " Jianfeng Tan
2015-12-31  6:53 ` [dpdk-dev] [PATCH 07/12] pmd/ixgbe: " Jianfeng Tan
2016-01-04 18:12   ` Ananyev, Konstantin
2016-01-05  1:25     ` Tan, Jianfeng
2015-12-31  6:53 ` [dpdk-dev] [PATCH 08/12] pmd/mlx4: " Jianfeng Tan
2016-01-04 11:11   ` Adrien Mazarguil
2016-01-05  3:08     ` Tan, Jianfeng
2016-01-05 16:18       ` Adrien Mazarguil
2016-01-11  5:07         ` Tan, Jianfeng
2015-12-31  6:53 ` [dpdk-dev] [PATCH 09/12] pmd/mlx5: " Jianfeng Tan
2015-12-31  6:53 ` [dpdk-dev] [PATCH 10/12] pmd/nfp: " Jianfeng Tan
2015-12-31  6:53 ` [dpdk-dev] [PATCH 11/12] pmd/vmxnet3: " Jianfeng Tan
2015-12-31  6:53 ` [dpdk-dev] [PATCH 12/12] examples/l3fwd: add option to parse ptype Jianfeng Tan
2016-01-04 18:32   ` Ananyev, Konstantin
2016-01-05  2:44     ` Tan, Jianfeng
2016-01-05 16:49       ` Ananyev, Konstantin
2016-01-07  1:20         ` Tan, Jianfeng
2016-01-07  9:44           ` Ananyev, Konstantin
2016-01-13  1:52 ` [dpdk-dev] [PATCH 00/12] Add API to get packet type info Qiu, Michael
2016-01-15  5:45 ` [dpdk-dev] [PATCH v2 " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 01/12] ethdev: add API to query packet type filling info Jianfeng Tan
2016-01-15 13:58     ` Adrien Mazarguil
2016-01-15 15:11       ` Ananyev, Konstantin
2016-01-15 15:33         ` Adrien Mazarguil
2016-01-15 15:03     ` Ananyev, Konstantin
2016-02-25  6:53       ` Tan, Jianfeng
2016-02-25 11:17         ` Ananyev, Konstantin
2016-02-25 14:57           ` Tan, Jianfeng
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 02/12] pmd/cxgbe: add dev_ptype_info_get implementation Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 03/12] pmd/e1000: " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 04/12] pmd/enic: " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 05/12] pmd/fm10k: " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 06/12] pmd/i40e: " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 07/12] pmd/ixgbe: " Jianfeng Tan
2016-01-15 14:50     ` Ananyev, Konstantin
2016-02-25  6:43       ` Tan, Jianfeng
2016-02-25 11:10         ` Ananyev, Konstantin
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 08/12] pmd/mlx4: " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 09/12] pmd/mlx5: " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 10/12] pmd/nfp: " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 11/12] pmd/vmxnet3: " Jianfeng Tan
2016-01-15  5:45   ` [dpdk-dev] [PATCH v2 12/12] examples/l3fwd: add option to parse ptype Jianfeng Tan
2016-01-15 14:47     ` Ananyev, Konstantin
2016-02-25 10:41       ` Tan, Jianfeng
2016-02-25 10:57         ` Ananyev, Konstantin
2016-02-23 17:31   ` [dpdk-dev] [PATCH v2 00/12] Add API to get packet type info Bruce Richardson
2016-02-25  7:53 ` [dpdk-dev] [PATCH v3 " Jianfeng Tan
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 01/12] ethdev: add API to query packet type filling info Jianfeng Tan
2016-02-25 15:46     ` Ananyev, Konstantin
2016-02-25 16:36       ` Tan, Jianfeng
2016-02-25 17:16         ` Ananyev, Konstantin
2016-02-26  1:42           ` Tan, Jianfeng
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 02/12] pmd/cxgbe: add dev_ptype_info_get implementation Jianfeng Tan
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 03/12] pmd/e1000: " Jianfeng Tan
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 04/12] pmd/enic: " Jianfeng Tan
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 05/12] pmd/fm10k: " Jianfeng Tan
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 06/12] pmd/i40e: " Jianfeng Tan
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 07/12] pmd/ixgbe: " Jianfeng Tan
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 08/12] pmd/mlx4: " Jianfeng Tan
2016-02-25  7:53   ` [dpdk-dev] [PATCH v3 09/12] pmd/mlx5: " Jianfeng Tan
2016-02-25  7:54   ` [dpdk-dev] [PATCH v3 10/12] pmd/nfp: " Jianfeng Tan
2016-02-25  7:54   ` [dpdk-dev] [PATCH v3 11/12] pmd/vmxnet3: " Jianfeng Tan
2016-02-25  7:54   ` [dpdk-dev] [PATCH v3 12/12] examples/l3fwd: add option to parse ptype Jianfeng Tan
2016-02-26  0:04 ` [dpdk-dev] [PATCH v4 00/12] Add API to get packet type info Jianfeng Tan
2016-02-26  0:04   ` [dpdk-dev] [PATCH v4 01/12] ethdev: add API to query packet type filling info Jianfeng Tan
2016-02-26  0:09 ` [dpdk-dev] [PATCH v4 00/12] Add API to get packet type info Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 01/12] ethdev: add API to query packet type filling info Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 02/12] pmd/cxgbe: add dev_ptype_info_get implementation Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 03/12] pmd/e1000: " Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 04/12] pmd/enic: " Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 05/12] pmd/fm10k: " Jianfeng Tan
2016-03-02 20:11     ` Chen, Jing D
2016-03-03  6:03       ` Tan, Jianfeng
2016-03-03 15:47         ` Ananyev, Konstantin
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 06/12] pmd/i40e: " Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 07/12] pmd/ixgbe: " Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 08/12] pmd/mlx4: " Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 09/12] pmd/mlx5: " Jianfeng Tan
2016-02-26  8:26     ` Adrien Mazarguil
2016-02-26  8:36       ` Tan, Jianfeng
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 10/12] pmd/nfp: " Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 11/12] pmd/vmxnet3: " Jianfeng Tan
2016-02-26  0:09   ` [dpdk-dev] [PATCH v4 12/12] examples/l3fwd: add option to parse ptype Jianfeng Tan
2016-02-26 13:14     ` Ananyev, Konstantin
2016-02-26 14:21       ` Tan, Jianfeng
2016-02-26 14:27         ` Ananyev, Konstantin
2016-02-26  7:34 ` [dpdk-dev] [PATCH v5 00/11] Add API to get packet type info Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 01/11] ethdev: add API to query packet type filling info Jianfeng Tan
2016-02-29 11:34     ` Panu Matilainen
2016-02-29 16:41       ` Tan, Jianfeng
2016-03-01  6:29         ` Panu Matilainen
2016-03-01  7:59           ` Thomas Monjalon
2016-03-01  8:00           ` Tan, Jianfeng
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 02/11] pmd/cxgbe: add dev_ptype_info_get implementation Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 03/11] pmd/e1000: " Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 04/11] pmd/enic: " Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 05/11] pmd/fm10k: " Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 06/11] pmd/i40e: " Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 07/11] pmd/ixgbe: " Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 08/11] pmd/mlx4: " Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 09/11] pmd/mlx5: " Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 10/11] pmd/nfp: " Jianfeng Tan
2016-02-26  7:34   ` [dpdk-dev] [PATCH v5 11/11] pmd/vmxnet3: " Jianfeng Tan
2016-02-29 16:54   ` [dpdk-dev] [PATCH v5 00/11] Add API to get packet type info Ananyev, Konstantin
2016-02-29 17:01     ` Adrien Mazarguil
2016-02-29 20:30 ` [dpdk-dev] [PATCH v6 " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 01/11] ethdev: add API to query packet type filling info Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 02/11] pmd/cxgbe: add dev_ptype_info_get implementation Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 03/11] pmd/e1000: " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 04/11] pmd/enic: " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 05/11] pmd/fm10k: " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 06/11] pmd/i40e: " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 07/11] pmd/ixgbe: " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 08/11] pmd/mlx4: " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 09/11] pmd/mlx5: " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 10/11] pmd/nfp: " Jianfeng Tan
2016-02-29 20:30   ` [dpdk-dev] [PATCH v6 11/11] pmd/vmxnet3: " Jianfeng Tan
2016-03-01  1:23 ` [dpdk-dev] [PATCH] examples/l3fwd: fix using packet type blindly Jianfeng Tan
2016-03-01 13:51   ` Ananyev, Konstantin
2016-03-01 14:17     ` Tan, Jianfeng
2016-03-01 14:30       ` Ananyev, Konstantin
2016-03-04  8:38   ` [dpdk-dev] [PATCH v2] " Jianfeng Tan
2016-03-07 18:51     ` Ananyev, Konstantin
2016-03-08 17:11       ` Tan, Jianfeng
2016-03-10  5:50   ` [dpdk-dev] [PATCH v3 0/2] " Jianfeng Tan
2016-03-10  5:50     ` [dpdk-dev] [PATCH v3 1/2] " Jianfeng Tan
2016-03-10  5:50     ` [dpdk-dev] [PATCH v3 2/2] config: enable vector driver by default Jianfeng Tan
2016-03-10 14:26     ` [dpdk-dev] [PATCH v3 0/2] examples/l3fwd: fix using packet type blindly Ananyev, Konstantin
2016-03-25  0:47   ` [dpdk-dev] [PATCH v4 0/3] packet type Jianfeng Tan
2016-03-25  0:47     ` [dpdk-dev] [PATCH v4 1/3] ethdev: refine API to query supported packet types Jianfeng Tan
2016-03-25  3:15       ` [dpdk-dev] [PATCH 0/2] ethdev: refine new API to query supported ptypes Jianfeng Tan
2016-03-25  3:15         ` [dpdk-dev] [PATCH 1/2] " Jianfeng Tan
2016-03-25  3:15         ` [dpdk-dev] [PATCH 2/2] doc: update which PMDs can parse packet type Jianfeng Tan
2016-03-25 14:21           ` Bruce Richardson
2016-03-25 16:10             ` Tan, Jianfeng
2016-04-01 15:55               ` Thomas Monjalon
2016-03-25 10:57         ` [dpdk-dev] [PATCH 0/2] ethdev: refine new API to query supported ptypes Ananyev, Konstantin
2016-04-06  3:51         ` [dpdk-dev] [PATCH v2] " Jianfeng Tan
2016-04-06 14:32           ` Thomas Monjalon
2016-03-25 10:01       ` [dpdk-dev] [PATCH v4 1/3] ethdev: refine API to query supported packet types Tan, Jianfeng
2016-03-25 10:13       ` Bruce Richardson
2016-03-25  0:47     ` [dpdk-dev] [PATCH v4 2/3] examples/l3fwd: fix using packet type blindly Jianfeng Tan
2016-03-25 18:24       ` Thomas Monjalon
2016-03-25  0:47     ` [dpdk-dev] [PATCH v4 3/3] config: enable vector driver by default Jianfeng Tan
2016-03-25 18:34     ` [dpdk-dev] [PATCH v4 0/3] packet type Thomas Monjalon
2016-03-09 19:31 ` [dpdk-dev] [PATCH v7 00/11] Add API to get packet type info Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 01/11] ethdev: add API to query packet type filling info Jianfeng Tan
2016-03-10 14:28     ` Bruce Richardson
2016-03-14  9:44     ` Thomas Monjalon
2016-03-14  9:48       ` Bruce Richardson
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 02/11] pmd/cxgbe: add dev_ptype_info_get implementation Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 03/11] pmd/e1000: " Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 04/11] pmd/enic: " Jianfeng Tan
2016-03-10 14:50     ` Bruce Richardson
2016-03-10 14:51       ` Bruce Richardson
2016-03-10 18:23         ` Tan, Jianfeng
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 05/11] pmd/fm10k: " Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 06/11] pmd/i40e: " Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 07/11] pmd/ixgbe: " Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 08/11] pmd/mlx4: " Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 09/11] pmd/mlx5: " Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 10/11] pmd/nfp: " Jianfeng Tan
2016-03-09 19:31   ` [dpdk-dev] [PATCH v7 11/11] pmd/vmxnet3: " Jianfeng Tan
2016-03-10 14:55   ` [dpdk-dev] [PATCH v7 00/11] Add API to get packet type info Bruce Richardson
2016-03-14  7:42 ` [dpdk-dev] [PATCH v8 00/11] Add API to get supported packet types Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 01/11] ethdev: add API to query " Jianfeng Tan
2016-03-14 17:14     ` Ferruh Yigit
2016-03-14 20:50       ` [dpdk-dev] [PATCH v9 " Jianfeng Tan
2016-03-18  9:17         ` Tan, Jianfeng
2016-03-15  1:42       ` [dpdk-dev] [PATCH v8 " Tan, Jianfeng
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 02/11] cxgbe: add dev_supported_ptypes_get implementation Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 03/11] e1000: " Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 04/11] enic: " Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 05/11] fm10k: " Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 06/11] i40e: " Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 07/11] ixgbe: " Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 08/11] mlx4: " Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 09/11] mlx5: " Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 10/11] nfp: " Jianfeng Tan
2016-03-14  7:42   ` [dpdk-dev] [PATCH v8 11/11] vmxnet3: " Jianfeng Tan
2016-03-18 16:21   ` [dpdk-dev] [PATCH v8 00/11] Add API to get supported packet types Bruce Richardson

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