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From: Thomas Monjalon <thomas@monjalon.net>
To: Slava Ovsiienko <viacheslavo@nvidia.com>,
	Andrew Rybchenko <Andrew.Rybchenko@oktetlabs.ru>,
	"Yigit, Ferruh" <ferruh.yigit@intel.com>,
	"Ananyev, Konstantin" <konstantin.ananyev@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
	"stephen@networkplumber.org" <stephen@networkplumber.org>,
	Shahaf Shuler <shahafs@nvidia.com>,
	"olivier.matz@6wind.com" <olivier.matz@6wind.com>,
	"jerinjacobk@gmail.com" <jerinjacobk@gmail.com>,
	"maxime.coquelin@redhat.com" <maxime.coquelin@redhat.com>,
	"david.marchand@redhat.com" <david.marchand@redhat.com>,
	Asaf Penso <asafp@nvidia.com>
Subject: Re: [dpdk-dev] [RFC] ethdev: introduce Rx buffer split
Date: Mon, 12 Oct 2020 18:52:50 +0200
Message-ID: <1847409.7NbrJBXJ13@thomas> (raw)
In-Reply-To: <BYAPR11MB3301D2DFF0A7E017203FDB899A070@BYAPR11MB3301.namprd11.prod.outlook.com>

12/10/2020 17:56, Ananyev, Konstantin:
> > From: Ananyev, Konstantin <konstantin.ananyev@intel.com>
> > > > 12/10/2020 11:56, Slava Ovsiienko:
> > > > > We have two approaches how to specify multiple segments to split Rx
> > > packets:
> > > > > 1. update queue configuration structure 2. introduce new
> > > > > rx_queue_setup_ex() routine with extra parameters.
> > > > >
> > > > > For [1] my only actual dislike is that we would have multiple places
> > > > > to specify the pool - in rx_queue_setup() and in the config
> > > > > structure. So, we should implement some checking (if we have offload
> > > > > flag set we should check whether mp parameter is NULL and segment
> > > > > descriptions array pointer/size is provided, if no offload flag set - we must
> > > check the description array is empty).
> > > > >
> > > > > > @Thomas, @Ferruh: I'd like to hear what other ethdev maintainers
> > > > > > think about it.
> > > > >
> > > > > Yes, it would be very nice to hear extra opinions. Do we think the
> > > > > providing of extra API function is worse than extending existing
> > > > > structure, introducing some conditional ambiguity and complicating
> > > > > the parameter compliance check?
> > > >
> > > > Let's try listing pros and cons of each approach, so we can conclude.
> > > >
> > > > 1/ update queue config struct
> > > >
> > > > 	1.1 pro: keep same queue setup function
> > > > 	1.2 con: two mempool pointers (struct or function)
> > > > 	1.3 con: variable size of segment description array
> > > >
> > > > 2/ new queue setup function
> > > >
> > > > 	2.1 con: two functions for queue setup
> > > > 	2.2 pro: mempool pointer is not redundant
> > > > 	2.3 pro: segment description array size defined by the caller
> > > >
> > > > What else I'm missing?
> > > >
> > >
> > > My 2 cents: can we make new (_ex) function to work for both original config
> > > (1 mp for all sizes, no split) and for new config (multiple mp, split allowed)?
> > > Then in future (21.11?) we can either get rid of original one, or even make it
> > > a wrapper around all one?
> > > Konstantin
> > 
> > Yes, actually the mlx5 PMD implementation follows this approach -
> > specifying the segment description array with the only element
> > and zero size/offset provides exactly the same configuration as existing
> > rte_eth_rx_queue_setup().
> > 
> > Currently I'm detailing the description  (how HEAD_ROOM is handled, what happens
> > if array is shorter the the buffer chain for segment of maximal size, the zero segment
> > size means follow the value deduced from the pool and so on).
> > 
> > So, may we consider this point as one more "pro" to setup_ex approach ? 😊
> 
> From my perspective, yes.
> It is sort of more gradual approach.
> I expect it would be experimental function for some time,
> so we'll have time to try it, adjust, fix, etc without breaking original one.

I like the wrapper idea.
Is it possible to call rte_eth_rx_queue_setup_ex()
from rte_eth_rx_queue_setup() using a rte_eth_rxseg object on the stack?



  parent reply index

Thread overview: 172+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-17 17:49 Slava Ovsiienko
2020-09-17 16:55 ` Andrew Rybchenko
2020-10-01  8:54   ` Slava Ovsiienko
2020-10-12  8:45     ` Andrew Rybchenko
2020-10-12  9:56       ` Slava Ovsiienko
2020-10-12 15:14         ` Thomas Monjalon
2020-10-12 15:28           ` Ananyev, Konstantin
2020-10-12 15:34             ` Slava Ovsiienko
2020-10-12 15:56               ` Ananyev, Konstantin
2020-10-12 15:59                 ` Slava Ovsiienko
2020-10-12 16:52                 ` Thomas Monjalon [this message]
2020-10-12 16:03           ` Andrew Rybchenko
2020-10-12 16:10             ` Slava Ovsiienko
2020-10-13 21:59         ` Ferruh Yigit
2020-10-14  7:17           ` Thomas Monjalon
2020-10-14  7:37           ` Slava Ovsiienko
2020-10-05  6:26 ` [dpdk-dev] [PATCH 0/5] " Viacheslav Ovsiienko
2020-10-05  6:26   ` [dpdk-dev] [PATCH 1/5] " Viacheslav Ovsiienko
2020-10-05  6:26   ` [dpdk-dev] [PATCH 2/5] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-05  6:26   ` [dpdk-dev] [PATCH 3/5] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-05  6:26   ` [dpdk-dev] [PATCH 4/5] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-05  6:26   ` [dpdk-dev] [PATCH 5/5] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-07 15:06 ` [dpdk-dev] [PATCH v2 0/9] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 1/9] " Viacheslav Ovsiienko
2020-10-11 22:17     ` Thomas Monjalon
2020-10-12  9:40       ` Slava Ovsiienko
2020-10-12 10:09         ` Thomas Monjalon
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 2/9] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 3/9] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 4/9] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 5/9] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 6/9] net/mlx5: add extended Rx queue setup routine Viacheslav Ovsiienko
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 7/9] net/mlx5: configure Rx queue to support split Viacheslav Ovsiienko
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 8/9] net/mlx5: register multiple pool for Rx queue Viacheslav Ovsiienko
2020-10-07 15:06   ` [dpdk-dev] [PATCH v2 9/9] net/mlx5: update Rx datapath to support split Viacheslav Ovsiienko
2020-10-12 16:19 ` [dpdk-dev] [PATCH v3 0/9] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 1/9] " Viacheslav Ovsiienko
2020-10-12 16:38     ` Andrew Rybchenko
2020-10-12 17:03       ` Thomas Monjalon
2020-10-12 17:11         ` Andrew Rybchenko
2020-10-12 20:22           ` Slava Ovsiienko
2020-10-12 17:11         ` Slava Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 2/9] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 3/9] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 4/9] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 5/9] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 6/9] net/mlx5: add extended Rx queue setup routine Viacheslav Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 7/9] net/mlx5: configure Rx queue to support split Viacheslav Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 8/9] net/mlx5: register multiple pool for Rx queue Viacheslav Ovsiienko
2020-10-12 16:19   ` [dpdk-dev] [PATCH v3 9/9] net/mlx5: update Rx datapath to support split Viacheslav Ovsiienko
2020-10-12 20:09 ` [dpdk-dev] [PATCH v4 0/9] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-12 20:09   ` [dpdk-dev] [PATCH v4 1/9] " Viacheslav Ovsiienko
2020-10-12 20:09   ` [dpdk-dev] [PATCH v4 2/9] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-12 20:09   ` [dpdk-dev] [PATCH v4 3/9] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-12 20:09   ` [dpdk-dev] [PATCH v4 4/9] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-12 20:09   ` [dpdk-dev] [PATCH v4 5/9] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-12 20:09   ` [dpdk-dev] [PATCH v4 6/9] net/mlx5: add extended Rx queue setup routine Viacheslav Ovsiienko
2020-10-12 20:10   ` [dpdk-dev] [PATCH v4 7/9] net/mlx5: configure Rx queue to support split Viacheslav Ovsiienko
2020-10-12 20:10   ` [dpdk-dev] [PATCH v4 8/9] net/mlx5: register multiple pool for Rx queue Viacheslav Ovsiienko
2020-10-12 20:10   ` [dpdk-dev] [PATCH v4 9/9] net/mlx5: update Rx datapath to support split Viacheslav Ovsiienko
2020-10-13 19:21 ` [dpdk-dev] [PATCH v5 0/6] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-13 19:21   ` [dpdk-dev] [PATCH v5 1/6] " Viacheslav Ovsiienko
2020-10-13 22:34     ` Ferruh Yigit
2020-10-14 13:31       ` Olivier Matz
2020-10-14 14:42       ` Slava Ovsiienko
2020-10-13 19:21   ` [dpdk-dev] [PATCH v5 2/6] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-13 19:21   ` [dpdk-dev] [PATCH v5 3/6] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-13 19:21   ` [dpdk-dev] [PATCH v5 4/6] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-13 19:21   ` [dpdk-dev] [PATCH v5 5/6] app/testpmd: add rxoffs " Viacheslav Ovsiienko
2020-10-13 19:21   ` [dpdk-dev] [PATCH v5 6/6] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-14 18:11 ` [dpdk-dev] [PATCH v6 0/6] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-14 18:11   ` [dpdk-dev] [PATCH v6 1/6] " Viacheslav Ovsiienko
2020-10-14 18:57     ` Jerin Jacob
2020-10-15  7:43       ` Slava Ovsiienko
2020-10-15  9:27         ` Jerin Jacob
2020-10-15 10:27           ` Jerin Jacob
2020-10-15 10:51             ` Slava Ovsiienko
2020-10-15 11:26               ` Jerin Jacob
2020-10-15 11:36                 ` Ferruh Yigit
2020-10-15 11:49                   ` Slava Ovsiienko
2020-10-15 12:49                     ` Thomas Monjalon
2020-10-15 13:07                       ` Andrew Rybchenko
2020-10-15 13:57                         ` Slava Ovsiienko
2020-10-15 20:22                         ` Slava Ovsiienko
2020-10-15  9:49         ` Andrew Rybchenko
2020-10-15 10:34           ` Slava Ovsiienko
2020-10-15 11:09             ` Andrew Rybchenko
2020-10-15 14:39               ` Slava Ovsiienko
2020-10-14 22:13     ` Thomas Monjalon
2020-10-14 22:50     ` Ajit Khaparde
2020-10-15 10:11     ` Andrew Rybchenko
2020-10-15 10:19       ` Thomas Monjalon
2020-10-14 18:11   ` [dpdk-dev] [PATCH v6 2/6] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-14 18:11   ` [dpdk-dev] [PATCH v6 3/6] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-14 18:12   ` [dpdk-dev] [PATCH v6 4/6] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-14 18:12   ` [dpdk-dev] [PATCH v6 5/6] app/testpmd: add rxoffs " Viacheslav Ovsiienko
2020-10-14 18:12   ` [dpdk-dev] [PATCH v6 6/6] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-15  0:55 ` [dpdk-dev] [PATCH v2] eal/rte_malloc: add alloc_size() attribute to allocation functions Stephen Hemminger
2020-10-19 14:13   ` Thomas Monjalon
2020-10-19 14:22     ` Thomas Monjalon
2020-10-15 20:17 ` [dpdk-dev] [PATCH v7 0/6] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-15 20:17   ` [dpdk-dev] [PATCH v7 1/6] " Viacheslav Ovsiienko
2020-10-15 20:30     ` Jerin Jacob
2020-10-15 20:33     ` Thomas Monjalon
2020-10-15 22:01       ` Ajit Khaparde
2020-10-15 20:17   ` [dpdk-dev] [PATCH v7 2/6] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-15 20:17   ` [dpdk-dev] [PATCH v7 3/6] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-15 20:17   ` [dpdk-dev] [PATCH v7 4/6] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-15 20:17   ` [dpdk-dev] [PATCH v7 5/6] app/testpmd: add rxoffs " Viacheslav Ovsiienko
2020-10-15 20:17   ` [dpdk-dev] [PATCH v7 6/6] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-16  7:48 ` [dpdk-dev] [PATCH v8 0/6] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-16  7:48   ` [dpdk-dev] [PATCH v8 1/6] " Viacheslav Ovsiienko
2020-10-16  8:51     ` Andrew Rybchenko
2020-10-16  8:58       ` Andrew Rybchenko
2020-10-16  9:15       ` Slava Ovsiienko
2020-10-16  9:27         ` Andrew Rybchenko
2020-10-16  9:34           ` Slava Ovsiienko
2020-10-16  9:37         ` Thomas Monjalon
2020-10-16  9:38           ` Slava Ovsiienko
2020-10-16  9:19     ` Ferruh Yigit
2020-10-16  9:21       ` Andrew Rybchenko
2020-10-16  9:22       ` Slava Ovsiienko
2020-10-16  7:48   ` [dpdk-dev] [PATCH v8 2/6] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-16  7:48   ` [dpdk-dev] [PATCH v8 3/6] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-16  7:48   ` [dpdk-dev] [PATCH v8 4/6] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-16  7:48   ` [dpdk-dev] [PATCH v8 5/6] app/testpmd: add rxoffs " Viacheslav Ovsiienko
2020-10-16  7:48   ` [dpdk-dev] [PATCH v8 6/6] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-16 10:22 ` [dpdk-dev] [PATCH v9 0/6] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-16 10:22   ` [dpdk-dev] [PATCH v9 1/6] " Viacheslav Ovsiienko
2020-10-16 11:21     ` Ferruh Yigit
2020-10-16 13:08       ` Slava Ovsiienko
2020-10-16 10:22   ` [dpdk-dev] [PATCH v9 2/6] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-16 10:22   ` [dpdk-dev] [PATCH v9 3/6] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-16 10:22   ` [dpdk-dev] [PATCH v9 4/6] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-16 10:22   ` [dpdk-dev] [PATCH v9 5/6] app/testpmd: add rxoffs " Viacheslav Ovsiienko
2020-10-16 10:22   ` [dpdk-dev] [PATCH v9 6/6] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-16 12:41 ` [dpdk-dev] [PATCH v10 0/6] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-16 12:41   ` [dpdk-dev] [PATCH v10 1/6] " Viacheslav Ovsiienko
2020-10-16 12:41   ` [dpdk-dev] [PATCH v10 2/6] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-16 12:41   ` [dpdk-dev] [PATCH v10 3/6] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-16 12:41   ` [dpdk-dev] [PATCH v10 4/6] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-16 12:41   ` [dpdk-dev] [PATCH v10 5/6] app/testpmd: add rxoffs " Viacheslav Ovsiienko
2020-10-16 12:41   ` [dpdk-dev] [PATCH v10 6/6] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-16 13:39 ` [dpdk-dev] [PATCH v11 0/6] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-16 13:39   ` [dpdk-dev] [PATCH v11 1/6] " Viacheslav Ovsiienko
2020-10-16 15:14     ` Thomas Monjalon
2020-10-16 16:18       ` Slava Ovsiienko
2020-10-16 15:47     ` Ferruh Yigit
2020-10-16 16:05       ` Thomas Monjalon
2020-10-16 16:06         ` Ferruh Yigit
2020-10-16 13:39   ` [dpdk-dev] [PATCH v11 2/6] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-16 15:05     ` Ferruh Yigit
2020-10-16 15:38       ` Ferruh Yigit
2020-10-16 15:48         ` Slava Ovsiienko
2020-10-16 15:52           ` Ferruh Yigit
2020-10-16 15:55             ` Slava Ovsiienko
2020-10-16 15:57               ` Ferruh Yigit
2020-10-16 13:39   ` [dpdk-dev] [PATCH v11 3/6] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-16 13:39   ` [dpdk-dev] [PATCH v11 4/6] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-16 13:39   ` [dpdk-dev] [PATCH v11 5/6] app/testpmd: add rxoffs " Viacheslav Ovsiienko
2020-10-16 13:39   ` [dpdk-dev] [PATCH v11 6/6] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-16 16:44 ` [dpdk-dev] [PATCH v12 0/6] ethdev: introduce Rx buffer split Viacheslav Ovsiienko
2020-10-16 16:44   ` [dpdk-dev] [PATCH v12 1/6] " Viacheslav Ovsiienko
2020-10-16 19:22     ` Ferruh Yigit
2020-10-16 21:36       ` Ferruh Yigit
2020-10-16 16:44   ` [dpdk-dev] [PATCH v12 2/6] app/testpmd: add multiple pools per core creation Viacheslav Ovsiienko
2020-10-16 16:44   ` [dpdk-dev] [PATCH v12 3/6] app/testpmd: add buffer split offload configuration Viacheslav Ovsiienko
2020-10-16 16:44   ` [dpdk-dev] [PATCH v12 4/6] app/testpmd: add rxpkts commands and parameters Viacheslav Ovsiienko
2020-10-16 16:44   ` [dpdk-dev] [PATCH v12 5/6] app/testpmd: add rxoffs " Viacheslav Ovsiienko
2020-10-16 16:44   ` [dpdk-dev] [PATCH v12 6/6] app/testpmd: add extended Rx queue setup Viacheslav Ovsiienko
2020-10-16 17:05   ` [dpdk-dev] [PATCH v12 0/6] ethdev: introduce Rx buffer split Ferruh Yigit
2020-10-16 17:07     ` Slava Ovsiienko

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