From: "Richardson, Bruce" <bruce.richardson@intel.com>
To: Adrien Mazarguil <adrien.mazarguil@6wind.com>,
"Yang, Zhiyong" <zhiyong.yang@intel.com>
Cc: "Yigit, Ferruh" <ferruh.yigit@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"thomas@monjalon.net" <thomas@monjalon.net>,
"Wiles, Keith" <keith.wiles@intel.com>,
"stephen@networkplumber.org" <stephen@networkplumber.org>,
Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Subject: Re: [dpdk-dev] [PATCH v2 1/4] ethdev: increase port_id range
Date: Mon, 4 Sep 2017 13:17:56 +0000 [thread overview]
Message-ID: <59AF69C657FD0841A61C55336867B5B0721CFC11@IRSMSX103.ger.corp.intel.com> (raw)
In-Reply-To: <20170904131222.GV4301@6wind.com>
> -----Original Message-----
> From: Adrien Mazarguil [mailto:adrien.mazarguil@6wind.com]
> Sent: Monday, September 4, 2017 2:12 PM
> To: Yang, Zhiyong <zhiyong.yang@intel.com>
> Cc: Yigit, Ferruh <ferruh.yigit@intel.com>; Richardson, Bruce
> <bruce.richardson@intel.com>; dev@dpdk.org; thomas@monjalon.net; Wiles,
> Keith <keith.wiles@intel.com>; stephen@networkplumber.org; Nelio
> Laranjeiro <nelio.laranjeiro@6wind.com>
> Subject: Re: [dpdk-dev] [PATCH v2 1/4] ethdev: increase port_id range
>
> Hi Zhiyong,
>
> On Mon, Sep 04, 2017 at 09:47:10AM +0000, Yang, Zhiyong wrote:
> > Hi, Ferruh, Bruce:
> >
> > > -----Original Message-----
> > > From: Yigit, Ferruh
> > > Sent: Monday, September 4, 2017 5:30 PM
> > > To: Richardson, Bruce <bruce.richardson@intel.com>; Yang, Zhiyong
> > > <zhiyong.yang@intel.com>
> > > Cc: dev@dpdk.org; thomas@monjalon.net; Wiles, Keith
> > > <keith.wiles@intel.com>; stephen@networkplumber.org
> > > Subject: Re: [dpdk-dev] [PATCH v2 1/4] ethdev: increase port_id
> > > range
> > >
> > > On 9/4/2017 10:06 AM, Bruce Richardson wrote:
> > > > On Mon, Sep 04, 2017 at 01:57:31PM +0800, Zhiyong Yang wrote:
> > > >> Extend port_id definition from uint8_t to uint16_t in lib and
> > > >> drivers data structures, specifically rte_eth_dev_data. Modify
> > > >> the APIs, drivers and app using port_id at the same time except
> > > >> some drivers such as MLX4 and MLX5 due to fail to compile them in
> my server.
> > > >>
> > > > I think you can change those drivers too - it's not hard to set up
> > > > compilation for MLX drivers (instruction in DPDK docs on the
> > > > website), and even if you can't compile test them, e.g. dpaa2
> > > > drivers, or other SoC ones, others can do so on your behalf. If
> > > > you are going to change drivers, I think you should change all of
> them across the board.
> > >
> > > +1
> >
> > OK. I will change them.
>
> I haven't applied the series yet but I think mlx4 doesn't need any
> modification to support the new width. mlx5, on the other hand, at least
> uses the following field in its data path:
>
> unsigned int port_id:8;
>
> One related question, why not define a new type (like testpmd's portid_t)
> part of rte_ethdev.h? (rte_portid_t?)
>
> I think uint16_t may not last long with virtual ports and all, and when it
> becomes necessary, the switch to uint32_t will be painful. A typedef
> should also ease the conversion of user applications.
>
> If you choose to use a typedef, I suggest to do so in a separate patch
> first (uint8_t => rte_portid_t) before upgrading rte_portid_t to 16 bits
> in the subsequent patch. It means the first patch is large but trivial
> while the second one is shorter but deals with the complex changes such as
> the one needed for mlx5.
>
> Thanks.
The downside of hiding the size is that it becomes harder to reason about the layout of key structures like mbuf. Probably not a huge issue, though. A better question would be whether we would see the port id ever needing to increase in size to 32-bits? Even with virtual ports, I find it hard to see us needing more 64k ports in a single application.
Regards,
/Bruce
next prev parent reply other threads:[~2017-09-04 13:17 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-09 8:42 [dpdk-dev] [PATCH 0/2] " Zhiyong Yang
2017-08-09 8:42 ` [dpdk-dev] [PATCH 1/2] ethdev: " Zhiyong Yang
2017-08-09 12:52 ` Ferruh Yigit
2017-08-09 12:57 ` Wiles, Keith
2017-08-10 0:53 ` Yang, Zhiyong
2017-08-10 0:51 ` Yang, Zhiyong
2017-08-09 8:42 ` [dpdk-dev] [PATCH 2/2] examples: " Zhiyong Yang
2017-08-09 14:48 ` Stephen Hemminger
2017-08-10 1:03 ` Yang, Zhiyong
2017-08-09 9:00 ` [dpdk-dev] [PATCH 0/2] " De Lara Guarch, Pablo
2017-08-09 9:17 ` Yang, Zhiyong
2017-09-04 5:57 ` [dpdk-dev] [PATCH v2 0/4] " Zhiyong Yang
2017-09-04 5:57 ` [dpdk-dev] [PATCH v2 1/4] ethdev: " Zhiyong Yang
2017-09-04 9:06 ` Bruce Richardson
2017-09-04 9:29 ` Ferruh Yigit
2017-09-04 9:47 ` Yang, Zhiyong
2017-09-04 13:12 ` Adrien Mazarguil
2017-09-04 13:17 ` Richardson, Bruce [this message]
2017-09-04 13:36 ` Adrien Mazarguil
2017-09-04 13:59 ` Yang, Zhiyong
2017-09-04 14:41 ` Adrien Mazarguil
2017-09-05 6:51 ` Yang, Zhiyong
2017-09-06 8:32 ` Hemant Agrawal
2017-09-06 8:48 ` Yang, Zhiyong
[not found] ` <CALZ3Guikt9x8sz-oEKCuDCSp_wtKa64bSXTrMhqcWyg7f_dS7g@mail.gmail.com>
2017-09-07 0:45 ` Yang, Zhiyong
2017-09-04 5:57 ` [dpdk-dev] [PATCH v2 2/4] examples: " Zhiyong Yang
2017-09-04 14:15 ` Hunt, David
2017-09-04 15:01 ` Yang, Zhiyong
2017-09-04 5:57 ` [dpdk-dev] [PATCH v2 3/4] common_base: extend RTE_MAX_ETHPORTS from 32 to 1024 Zhiyong Yang
2017-09-04 7:46 ` Yao, Lei A
2017-09-04 7:59 ` Yang, Zhiyong
2017-09-04 9:09 ` Bruce Richardson
2017-09-04 10:05 ` Yang, Zhiyong
2017-09-04 10:27 ` Ananyev, Konstantin
2017-09-04 14:18 ` Yang, Zhiyong
2017-09-06 8:42 ` Hemant Agrawal
2017-09-06 8:52 ` Yang, Zhiyong
2017-09-04 10:29 ` Bruce Richardson
2017-09-04 9:27 ` Ananyev, Konstantin
2017-09-04 5:57 ` [dpdk-dev] [PATCH v2 4/4] testpmd: add flexibility to mbuf allocation Zhiyong Yang
2017-09-09 14:47 ` [dpdk-dev] [PATCH v3 0/4] increase port_id range Zhiyong Yang
2017-09-09 14:47 ` [dpdk-dev] [PATCH v3 1/4] ethdev: " Zhiyong Yang
2017-09-11 9:37 ` Adrien Mazarguil
2017-09-11 10:51 ` Yang, Zhiyong
2017-09-11 10:21 ` Ferruh Yigit
2017-09-13 2:26 ` Yang, Zhiyong
2017-09-13 11:56 ` Ferruh Yigit
2017-09-13 12:15 ` Yang, Zhiyong
2017-09-13 12:18 ` Thomas Monjalon
2017-09-13 13:33 ` Ferruh Yigit
2017-09-19 6:05 ` Yang, Zhiyong
2017-09-19 12:30 ` Wiles, Keith
2017-09-14 12:49 ` Ferruh Yigit
2017-09-15 5:11 ` Yang, Zhiyong
2017-09-09 14:47 ` [dpdk-dev] [PATCH v3 2/4] test: " Zhiyong Yang
2017-09-09 14:47 ` [dpdk-dev] [PATCH v3 3/4] examples: " Zhiyong Yang
2017-09-14 14:41 ` Ferruh Yigit
2017-09-09 14:47 ` [dpdk-dev] [PATCH v3 4/4] librte_mbuf: modify port initialization value Zhiyong Yang
2017-09-11 10:23 ` [dpdk-dev] [PATCH v3 0/4] increase port_id range Ferruh Yigit
2017-09-11 11:25 ` Yang, Zhiyong
2017-09-13 8:14 ` Matej Vido
2017-09-13 8:21 ` Yang, Zhiyong
2017-09-18 14:54 ` Laatz, Kevin
2017-09-19 1:39 ` Yang, Zhiyong
2017-09-11 10:26 ` Ferruh Yigit
2017-09-11 10:55 ` Yang, Zhiyong
2017-09-11 11:24 ` Ferruh Yigit
2017-09-21 8:32 ` [dpdk-dev] [PATCH v4 0/5] " Zhiyong Yang
2017-09-21 8:32 ` [dpdk-dev] [PATCH v4 1/5] net/bonding: remove bonding APIs using ABI versioning Zhiyong Yang
2017-09-21 10:36 ` Ferruh Yigit
2017-09-22 2:02 ` Yang, Zhiyong
2017-09-21 8:32 ` [dpdk-dev] [PATCH v4 2/5] ethdev: increase port_id range Zhiyong Yang
2017-09-21 11:49 ` Adrien Mazarguil
2017-10-06 14:34 ` Nélio Laranjeiro
2017-09-21 8:32 ` [dpdk-dev] [PATCH v4 3/5] examples: " Zhiyong Yang
2017-09-21 8:32 ` [dpdk-dev] [PATCH v4 4/5] test: " Zhiyong Yang
2017-09-21 8:32 ` [dpdk-dev] [PATCH v4 5/5] librte_mbuf: modify port initialization value Zhiyong Yang
2017-09-25 3:22 ` [dpdk-dev] [PATCH v5 0/5] increase port_id range Zhiyong Yang
2017-09-25 3:22 ` [dpdk-dev] [PATCH v5 1/5] net/bonding: remove bonding APIs using ABI versioning Zhiyong Yang
2017-09-25 11:34 ` Ferruh Yigit
2017-09-25 3:22 ` [dpdk-dev] [PATCH v5 2/5] ethdev: increase port_id range Zhiyong Yang
2017-09-25 11:37 ` Ferruh Yigit
2017-09-25 12:06 ` Ferruh Yigit
2017-09-26 7:01 ` Yang, Zhiyong
2017-09-27 18:44 ` Ferruh Yigit
2017-09-28 2:12 ` Yang, Zhiyong
2017-09-25 3:22 ` [dpdk-dev] [PATCH v5 3/5] examples: " Zhiyong Yang
2017-09-25 3:22 ` [dpdk-dev] [PATCH v5 4/5] test: " Zhiyong Yang
2017-09-25 3:22 ` [dpdk-dev] [PATCH v5 5/5] librte_mbuf: modify port initialization value Zhiyong Yang
2017-09-29 7:17 ` [dpdk-dev] [PATCH v6 0/5] increase port_id range Zhiyong Yang
2017-09-29 7:17 ` [dpdk-dev] [PATCH v6 1/5] net/bonding: remove bonding APIs using ABI versioning Zhiyong Yang
2017-09-29 7:17 ` [dpdk-dev] [PATCH v6 2/5] ethdev: increase port_id range Zhiyong Yang
2017-09-29 7:17 ` [dpdk-dev] [PATCH v6 3/5] examples: " Zhiyong Yang
2017-09-29 7:17 ` [dpdk-dev] [PATCH v6 4/5] test: " Zhiyong Yang
2017-09-29 7:17 ` [dpdk-dev] [PATCH v6 5/5] librte_mbuf: modify port initialization value Zhiyong Yang
2017-10-06 2:15 ` [dpdk-dev] [PATCH v6 0/5] increase port_id range Ferruh Yigit
2017-10-06 13:31 ` Gaëtan Rivet
2017-10-06 14:29 ` Thomas Monjalon
2017-10-06 16:02 ` Thomas Monjalon
2017-10-11 21:21 ` Ferruh Yigit
2017-10-12 1:33 ` Yang, Zhiyong
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