From: Slava Ovsiienko <viacheslavo@nvidia.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: NBU-Contact-Thomas Monjalon <thomas@monjalon.net>,
"stephen@networkplumber.org" <stephen@networkplumber.org>,
"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>,
"arybchenko@solarflare.com" <arybchenko@solarflare.com>
Subject: Re: [dpdk-dev] [PATCH v9 1/6] ethdev: introduce Rx buffer split
Date: Fri, 16 Oct 2020 13:08:35 +0000 [thread overview]
Message-ID: <MWHPR12MB1360089516A27A7137D75A9FDF030@MWHPR12MB1360.namprd12.prod.outlook.com> (raw)
In-Reply-To: <c569d982-20ea-45dd-659d-9862c29e88cb@intel.com>
> -----Original Message-----
> From: Ferruh Yigit <ferruh.yigit@intel.com>
> Sent: Friday, October 16, 2020 14:21
> To: Slava Ovsiienko <viacheslavo@nvidia.com>; dev@dpdk.org
> Cc: NBU-Contact-Thomas Monjalon <thomas@monjalon.net>;
> stephen@networkplumber.org; olivier.matz@6wind.com;
> jerinjacobk@gmail.com; maxime.coquelin@redhat.com;
> david.marchand@redhat.com; arybchenko@solarflare.com
> Subject: Re: [PATCH v9 1/6] ethdev: introduce Rx buffer split
>
> On 10/16/2020 11:22 AM, Viacheslav Ovsiienko wrote:
> > The DPDK datapath in the transmit direction is very flexible.
> > An application can build the multi-segment packet and manages almost
> > all data aspects - the memory pools where segments are allocated from,
> > the segment lengths, the memory attributes like external buffers,
> > registered for DMA, etc.
> >
[snip]
> > +
> > +* **[uses] rte_eth_rxconf,rte_eth_rxmode**:
> ``offloads:RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT``.
> > +* **[uses] rte_eth_rxconf**: ``rx_conf.rx_seg, rx_conf.rx_nseg``.
> > +* **[implements] datapath**: ``Buffer Split functionality``.
> > +* **[provides] rte_eth_dev_info**:
> ``rx_offload_capa:RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT``.
> > +* **[provides] eth_dev_ops**: ``rxq_info_get:buffer_split``.
>
> Previously you mentioned this is because 'rxq_info_get()' can provide
> buffer_split information, but with current implementation it doesn't and there
> is no filed in the struct to report such.
>
> I suggest either add it now, while you can :) [with a techboard approval], or
> remove above documentation of it.
>
> <...>
>
Mmm, I messed up with rx_burst_mode_get(). Will fix, thanks.
> > /**
> > + * Ethernet device Rx buffer segmentation capabilities.
> > + */
> > +__rte_experimental
> > +struct rte_eth_rxseg_capa {
> > + __extension__
> > + uint32_t max_nseg:16; /**< Maximum amount of segments to split. */
> > + uint32_t multi_pools:1; /**< Supports receiving to multiple pools.*/
> > + uint32_t offset_allowed:1; /**< Supports buffer offsets. */
> > + uint32_t offset_align_log2:4; /**< Required offset alignment. */ };
>
> Now we are fiddling details, but,
>
> I am not fun of the bitfields [1], but I assumed Thomas' request was to enable
> expanding capabilities later without breaking the ABI, which makes senses and
> suits to this kind of capability struct, if this is correct why made the 'max_nseg'
> a bitfield too?
>
> Why not,
> uint16_t max_nseg;
> uint16_t multi_pools:1
> uint16_t offset_allowed:1;
> uint16_t offset_align_log2:4;
> < This still leaves 10 bits to expand without ABI break>
>
> [1]
> unles very space critical use case, otherwise they just add more code to extract
> the same value, and not as simple as a simple variable :)
It seems not to be the case, there is the listing of the rte_eth_rx_queue_check_split():
8963 4b67 440FB784 movzwl 188(%rsp),%r8d ; [SO] max_nseg is fetched as regular uint16_t
8963 24BC0000
8963 00
8964 4b70 664539C1 cmpw %r8w,%r9w
8965 4b74 0F87A402 ja .L1749
8965 0000
I would prefer to keep uint32_t - it is more generic, IMO.
With best regards, Slava
next prev parent reply other threads:[~2020-10-16 13:08 UTC|newest]
Thread overview: 172+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-17 17:49 [dpdk-dev] [RFC] " 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
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 [this message]
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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