From: "Morten Brørup" <mb@smartsharesystems.com>
To: "Hanumanth Pothula" <hpothula@marvell.com>,
"Thomas Monjalon" <thomas@monjalon.net>,
"Ferruh Yigit" <ferruh.yigit@xilinx.com>,
"Andrew Rybchenko" <andrew.rybchenko@oktetlabs.ru>
Cc: <dev@dpdk.org>, <xuan.ding@intel.com>, <wenxuanx.wu@intel.com>,
<xiaoyun.li@intel.com>, <stephen@networkplumber.org>,
<yuanx.wang@intel.com>, <mdr@ashroe.eu>, <yuying.zhang@intel.com>,
<qi.z.zhang@intel.com>, <viacheslavo@nvidia.com>,
<jerinj@marvell.com>, <ndabilpuram@marvell.com>
Subject: RE: [PATCH v1 1/1] ethdev: introduce pool sort capability
Date: Fri, 12 Aug 2022 15:27:38 +0200 [thread overview]
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35D8725F@smartserver.smartshare.dk> (raw)
In-Reply-To: <20220812104648.1019978-1-hpothula@marvell.com>
> From: Hanumanth Pothula [mailto:hpothula@marvell.com]
> Sent: Friday, 12 August 2022 12.47
>
> Presently, the 'Buffer Split' feature supports sending multiple
> segments of the received packet to PMD, which programs the HW
> to receive the packet in segments from different pools.
>
> This patch extends the feature to support the pool sort capability.
> Some of the HW has support for choosing memory pools based on the
> packet's size. The pool sort capability allows PMD to choose a
> memory pool based on the packet's length.
>
> This is often useful for saving the memory where the application
> can create a different pool to steer the specific size of the
> packet, thus enabling effective use of memory.
>
> For example, let's say HW has a capability of three pools,
> - pool-1 size is 2K
> - pool-2 size is > 2K and < 4K
> - pool-3 size is > 4K
> Here,
> pool-1 can accommodate packets with sizes < 2K
> pool-2 can accommodate packets with sizes > 2K and < 4K
> pool-3 can accommodate packets with sizes > 4K
>
> With pool sort capability enabled in SW, an application may create
> three pools of different sizes and send them to PMD. Allowing PMD
> to program HW based on packet lengths. So that packets with less
> than 2K are received on pool-1, packets with lengths between 2K
> and 4K are received on pool-2 and finally packets greater than 4K
> are received on pool-3.
>
> The following two capabilities are added to the rte_eth_rxseg_capa
> structure,
> 1. pool_sort --> tells pool sort capability is supported by HW.
> 2. max_npool --> max number of pools supported by HW.
>
> Defined new structure rte_eth_rxseg_sort, to be used only when pool
> sort capability is present. If required this may be extended further
> to support more configurations.
>
> Signed-off-by: Hanumanth Pothula <hpothula@marvell.com>
> Change-Id: I5a2485a7919616902c468c767b5c01834d4a2c27
> ---
I like the concept of a PMD being able to use different mbuf pools depending on packet size.
However, the "pool sort" feature is not an extension of the "buffer split" feature, but a separate feature. The API and documentation must reflect this.
Please also consider this, when you implement it in the drivers: If no buffers are available in one of the pools, the next (larger) pool should be used instead of dropping the packet.
Here's another example use case: Assuming that 25 % of internet traffic is tiny packets (e.g. empty TCP ACK packets), a separate pool for those could be used.
next prev parent reply other threads:[~2022-08-12 13:27 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-12 10:46 Hanumanth Pothula
2022-08-12 13:27 ` Morten Brørup [this message]
2022-08-12 17:24 ` [PATCH v2 1/3] " Hanumanth Pothula
2022-08-12 17:24 ` [PATCH v2 2/3] app/testpmd: add command line argument 'rxseg-mode' Hanumanth Pothula
2022-08-12 17:24 ` [PATCH v2 3/3] net/cnxk: introduce pool sort capability Hanumanth Pothula
2022-08-23 3:26 ` [PATCH v2 1/3] ethdev: " Ding, Xuan
2022-08-24 15:33 ` Ferruh Yigit
2022-08-30 12:08 ` [EXT] " Hanumanth Reddy Pothula
2022-09-06 12:18 ` Ferruh Yigit
2022-09-07 7:02 ` Hanumanth Reddy Pothula
2022-09-07 11:24 ` Ferruh Yigit
2022-09-07 21:31 ` Hanumanth Reddy Pothula
2022-09-13 9:28 ` Ferruh Yigit
2022-09-13 10:00 ` Hanumanth Reddy Pothula
2022-09-02 7:00 ` [PATCH v3 " Hanumanth Pothula
2022-09-02 7:00 ` [PATCH v3 2/3] app/testpmd: Add support for " Hanumanth Pothula
2022-09-02 7:00 ` [PATCH v3 3/3] net/cnxk: introduce " Hanumanth Pothula
2022-09-13 8:06 ` [PATCH v3 1/3] ethdev: " Andrew Rybchenko
2022-09-13 9:31 ` Ferruh Yigit
2022-09-13 10:41 ` [EXT] " Hanumanth Reddy Pothula
2022-09-15 7:07 ` [PATCH v4 1/3] ethdev: Add support for mulitiple mbuf pools per Rx queue Hanumanth Pothula
2022-09-15 7:07 ` [PATCH v4 2/3] app/testpmd: " Hanumanth Pothula
2022-09-15 7:07 ` [PATCH v4 3/3] net/cnxk: Add support for mulitiple mbuf pools Hanumanth Pothula
2022-09-28 9:43 ` [PATCH v4 1/3] ethdev: Add support for mulitiple mbuf pools per Rx queue Andrew Rybchenko
2022-09-28 11:06 ` Thomas Monjalon
2022-10-06 17:01 ` [PATCH v5 1/3] ethdev: support " Hanumanth Pothula
2022-10-06 17:01 ` [PATCH v5 2/3] net/cnxk: " Hanumanth Pothula
2022-10-06 17:01 ` [PATCH v5 3/3] app/testpmd: " Hanumanth Pothula
2022-10-06 17:29 ` [PATCH v5 1/3] ethdev: " Stephen Hemminger
2022-10-07 14:13 ` Andrew Rybchenko
2022-10-06 17:53 ` [PATCH v6 " Hanumanth Pothula
2022-10-06 17:53 ` [PATCH v6 2/3] net/cnxk: " Hanumanth Pothula
2022-10-06 17:53 ` [PATCH v6 3/3] app/testpmd: " Hanumanth Pothula
2022-10-06 18:14 ` [PATCH v6 1/3] ethdev: " Hanumanth Reddy Pothula
2022-10-07 14:37 ` [PATCH v7 0/4] " Andrew Rybchenko
2022-10-07 14:37 ` [PATCH v7 1/4] ethdev: factor out helper function to check Rx mempool Andrew Rybchenko
2022-10-07 14:37 ` [PATCH v7 2/4] ethdev: support mulitiple mbuf pools per Rx queue Andrew Rybchenko
2022-10-07 16:08 ` Thomas Monjalon
2022-10-07 16:18 ` Stephen Hemminger
2022-10-07 16:20 ` Stephen Hemminger
2022-10-07 16:33 ` Andrew Rybchenko
2022-10-07 17:30 ` Andrew Rybchenko
2022-10-07 14:37 ` [PATCH v7 3/4] net/cnxk: " Andrew Rybchenko
2022-10-07 14:37 ` [PATCH v7 4/4] app/testpmd: " Andrew Rybchenko
2022-10-07 17:29 ` [PATCH v8 0/4] ethdev: " Andrew Rybchenko
2022-10-07 17:29 ` [PATCH v8 1/4] ethdev: factor out helper function to check Rx mempool Andrew Rybchenko
2022-10-07 17:29 ` [PATCH v8 2/4] ethdev: support multiple mbuf pools per Rx queue Andrew Rybchenko
2022-10-07 18:35 ` Thomas Monjalon
2022-10-07 19:45 ` Andrew Rybchenko
2022-10-07 17:29 ` [PATCH v8 3/4] net/cnxk: support mulitiple " Andrew Rybchenko
2022-10-07 17:29 ` [PATCH v8 4/4] app/testpmd: " Andrew Rybchenko
[not found] ` <PH0PR18MB47500560DC1793F68E7312DDCB5F9@PH0PR18MB4750.namprd18.prod.outlook.com>
2022-10-07 19:43 ` [EXT] " Andrew Rybchenko
2022-10-07 19:56 ` Hanumanth Reddy Pothula
2022-10-17 8:48 ` [PATCH v9 1/1] " Hanumanth Pothula
2022-10-21 15:57 ` Singh, Aman Deep
2022-10-24 3:32 ` [EXT] " Hanumanth Reddy Pothula
2022-10-24 4:07 ` [PATCH v10 1/1] app/testpmd: support multiple " Hanumanth Pothula
2022-10-25 1:40 ` [PATCH v11 " Hanumanth Pothula
2022-11-01 14:13 ` Hanumanth Reddy Pothula
2022-11-03 12:15 ` Singh, Aman Deep
2022-11-03 12:36 ` [EXT] " Hanumanth Reddy Pothula
2022-11-03 15:20 ` Singh, Aman Deep
2022-11-04 15:38 ` Hanumanth Reddy Pothula
2022-11-07 5:31 ` [PATCH v12 " Hanumanth Pothula
2022-11-09 8:04 ` Singh, Aman Deep
2022-11-09 10:39 ` Andrew Rybchenko
2022-11-10 6:51 ` Andrew Rybchenko
2022-11-10 8:17 ` [PATCH v13 " Hanumanth Pothula
2022-11-10 9:01 ` Andrew Rybchenko
2022-11-10 9:31 ` [EXT] " Hanumanth Reddy Pothula
2022-11-10 10:16 ` [PATCH v14 " Hanumanth Pothula
2022-11-10 10:47 ` Andrew Rybchenko
2022-11-17 8:43 ` Jiang, YuX
2022-11-17 11:38 ` Hanumanth Reddy Pothula
2022-10-08 20:38 ` [PATCH v8 0/4] ethdev: support mulitiple " Thomas Monjalon
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=98CBD80474FA8B44BF855DF32C47DC35D8725F@smartserver.smartshare.dk \
--to=mb@smartsharesystems.com \
--cc=andrew.rybchenko@oktetlabs.ru \
--cc=dev@dpdk.org \
--cc=ferruh.yigit@xilinx.com \
--cc=hpothula@marvell.com \
--cc=jerinj@marvell.com \
--cc=mdr@ashroe.eu \
--cc=ndabilpuram@marvell.com \
--cc=qi.z.zhang@intel.com \
--cc=stephen@networkplumber.org \
--cc=thomas@monjalon.net \
--cc=viacheslavo@nvidia.com \
--cc=wenxuanx.wu@intel.com \
--cc=xiaoyun.li@intel.com \
--cc=xuan.ding@intel.com \
--cc=yuanx.wang@intel.com \
--cc=yuying.zhang@intel.com \
/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).