From: Jerin Jacob <jerinjacobk@gmail.com>
To: Konstantin Ananyev <konstantin.ananyev@huawei.com>
Cc: "jerinj@marvell.com" <jerinj@marvell.com>,
"dev@dpdk.org" <dev@dpdk.org>,
Thomas Monjalon <thomas@monjalon.net>,
Ferruh Yigit <ferruh.yigit@amd.com>,
Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
"ferruh.yigit@xilinx.com" <ferruh.yigit@xilinx.com>,
"ajit.khaparde@broadcom.com" <ajit.khaparde@broadcom.com>,
"aboyer@pensando.io" <aboyer@pensando.io>,
"beilei.xing@intel.com" <beilei.xing@intel.com>,
"bruce.richardson@intel.com" <bruce.richardson@intel.com>,
"chas3@att.com" <chas3@att.com>,
"chenbo.xia@intel.com" <chenbo.xia@intel.com>,
"ciara.loftus@intel.com" <ciara.loftus@intel.com>,
"dsinghrawat@marvell.com" <dsinghrawat@marvell.com>,
"ed.czeck@atomicrules.com" <ed.czeck@atomicrules.com>,
"evgenys@amazon.com" <evgenys@amazon.com>,
"grive@u256.net" <grive@u256.net>,
"g.singh@nxp.com" <g.singh@nxp.com>,
"haiyue.wang@intel.com" <haiyue.wang@intel.com>,
"hkalra@marvell.com" <hkalra@marvell.com>,
"heinrich.kuhn@corigine.com" <heinrich.kuhn@corigine.com>,
"hemant.agrawal@nxp.com" <hemant.agrawal@nxp.com>,
"hyonkim@cisco.com" <hyonkim@cisco.com>,
"igorch@amazon.com" <igorch@amazon.com>,
"irusskikh@marvell.com" <irusskikh@marvell.com>,
"jgrajcia@cisco.com" <jgrajcia@cisco.com>,
"jasvinder.singh@intel.com" <jasvinder.singh@intel.com>,
"jianwang@trustnetic.com" <jianwang@trustnetic.com>,
"jiawenwu@trustnetic.com" <jiawenwu@trustnetic.com>,
"jingjing.wu@intel.com" <jingjing.wu@intel.com>,
"johndale@cisco.com" <johndale@cisco.com>,
"john.miller@atomicrules.com" <john.miller@atomicrules.com>,
"linville@tuxdriver.com" <linville@tuxdriver.com>,
"keith.wiles@intel.com" <keith.wiles@intel.com>,
"kirankumark@marvell.com" <kirankumark@marvell.com>,
"lironh@marvell.com" <lironh@marvell.com>,
"longli@microsoft.com" <longli@microsoft.com>,
"mw@semihalf.com" <mw@semihalf.com>,
"spinler@cesnet.cz" <spinler@cesnet.cz>,
"matan@nvidia.com" <matan@nvidia.com>,
"matt.peters@windriver.com" <matt.peters@windriver.com>,
"maxime.coquelin@redhat.com" <maxime.coquelin@redhat.com>,
"mk@semihalf.com" <mk@semihalf.com>,
"humin (Q)" <humin29@huawei.com>,
"pnalla@marvell.com" <pnalla@marvell.com>,
"ndabilpuram@marvell.com" <ndabilpuram@marvell.com>,
"qiming.yang@intel.com" <qiming.yang@intel.com>,
"qi.z.zhang@intel.com" <qi.z.zhang@intel.com>,
"radhac@marvell.com" <radhac@marvell.com>,
"rahul.lakkireddy@chelsio.com" <rahul.lakkireddy@chelsio.com>,
"rmody@marvell.com" <rmody@marvell.com>,
"rosen.xu@intel.com" <rosen.xu@intel.com>,
"sachin.saxena@oss.nxp.com" <sachin.saxena@oss.nxp.com>,
"skoteshwar@marvell.com" <skoteshwar@marvell.com>,
"shshaikh@marvell.com" <shshaikh@marvell.com>,
"shaibran@amazon.com" <shaibran@amazon.com>,
"shepard.siegel@atomicrules.com"
<shepard.siegel@atomicrules.com>,
"asomalap@amd.com" <asomalap@amd.com>,
"somnath.kotur@broadcom.com" <somnath.kotur@broadcom.com>,
"sthemmin@microsoft.com" <sthemmin@microsoft.com>,
"steven.webster@windriver.com" <steven.webster@windriver.com>,
"skori@marvell.com" <skori@marvell.com>,
"mtetsuyah@gmail.com" <mtetsuyah@gmail.com>,
"vburru@marvell.com" <vburru@marvell.com>,
"viacheslavo@nvidia.com" <viacheslavo@nvidia.com>,
"xiao.w.wang@intel.com" <xiao.w.wang@intel.com>,
"Wangxiaoyun (Cloud)" <cloud.wangxiaoyun@huawei.com>,
"Zhuangyuzeng (Yisen)" <yisen.zhuang@huawei.com>,
"yongwang@vmware.com" <yongwang@vmware.com>,
"Xuanziyang (William)" <william.xuanziyang@huawei.com>,
"cristian.dumitrescu@intel.com" <cristian.dumitrescu@intel.com>
Subject: Re: [dpdk-dev] [v1] ethdev: support Tx queue used count
Date: Tue, 16 Jan 2024 12:07:27 +0530 [thread overview]
Message-ID: <CALBAE1Nso2jMv_NwUGkMyMdKRUEStRCaj-ZT6wfrczv1s97g0w@mail.gmail.com> (raw)
In-Reply-To: <2f45bf93d17a4ea688fdc23bf6f50027@huawei.com>
On Fri, Jan 12, 2024 at 6:03 PM Konstantin Ananyev
<konstantin.ananyev@huawei.com> wrote:
>
> Hi Jerin,
Hi Konstantin,
>
> > Introduce a new API to retrieve the number of used descriptors
> > in a Tx queue. Applications can leverage this API in the fast path to
> > inspect the Tx queue occupancy and take appropriate actions based on the
> > available free descriptors.
> >
> > A notable use case could be implementing Random Early Discard (RED)
> > in software based on Tx queue occupancy.
> >
> > Signed-off-by: Jerin Jacob <jerinj@marvell.com>
> > @@ -6803,6 +6803,80 @@ rte_eth_recycle_mbufs(uint16_t rx_port_id, uint16_t rx_queue_id,
> > __rte_experimental
> > int rte_eth_buffer_split_get_supported_hdr_ptypes(uint16_t port_id, uint32_t *ptypes, int num);
> >
> > +/**
> > + * @warning
> > + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
> > + *
> > + * Get the number of used descriptors of a Tx queue
> > + *
> > + * This function retrieves the number of used descriptors of a transmit queue.
> > + * Applications can use this API in the fast path to inspect Tx queue occupancy and take
> > + * appropriate actions based on the available free descriptors.
> > + * An example action could be implementing the Random Early Discard (RED).
>
> Sorry, I probably misunderstood your previous mails, but wouldn't it be more convenient
> for user to have rte_eth_tx_queue_free_count(...) as fast-op, and
> have rte_eth_tx_queue_count(...) { queue_txd_num - rte_eth_tx_queue_free_count(...);}
> as a slow-path function in rte_ethdev.c?
The general feedback is to align with the Rx queue API, specifically
rte_eth_rx_queue_count,
and it's noted that there is no equivalent rte_eth_rx_queue_free_count.
Given that the free count can be obtained by subtracting the used
count from queue_txd_num,
it is considered that either approach is acceptable.
The application configures queue_txd_num with tx_queue_setup(), and
the application can store that value in its structure.
This would enable fast-path usage for both base cases (whether the
application needs information about free or used descriptors)
with just one API(rte_eth_tx_queue_count())
> Konstantin
next prev parent reply other threads:[~2024-01-16 6:37 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-19 17:29 [dpdk-dev] [RFC] ethdev: support Tx queue free descriptor query jerinj
2024-01-04 13:16 ` Dumitrescu, Cristian
2024-01-04 13:35 ` Jerin Jacob
2024-01-04 14:21 ` Konstantin Ananyev
2024-01-04 18:29 ` Thomas Monjalon
2024-01-05 9:57 ` Jerin Jacob
2024-01-05 10:03 ` Thomas Monjalon
2024-01-05 11:12 ` Konstantin Ananyev
2024-01-08 20:54 ` Morten Brørup
2024-01-09 14:45 ` Jerin Jacob
2024-01-04 21:17 ` Thomas Monjalon
2024-01-05 9:54 ` Jerin Jacob
2024-01-05 10:02 ` Thomas Monjalon
2024-01-08 10:54 ` Bruce Richardson
2024-01-08 21:15 ` Morten Brørup
2024-01-09 8:47 ` Bruce Richardson
2024-01-12 10:56 ` Ferruh Yigit
2024-01-11 15:17 ` [dpdk-dev] [v1] ethdev: support Tx queue used count jerinj
2024-01-11 16:17 ` Andrew Rybchenko
2024-01-12 6:56 ` Jerin Jacob
2024-01-11 16:20 ` Morten Brørup
2024-01-12 6:59 ` Jerin Jacob
2024-01-11 17:00 ` Stephen Hemminger
2024-01-12 7:01 ` Jerin Jacob
2024-01-12 16:30 ` Stephen Hemminger
2024-01-12 8:02 ` David Marchand
2024-01-12 9:29 ` Jerin Jacob
2024-01-12 11:34 ` Ferruh Yigit
2024-01-12 12:11 ` David Marchand
2024-01-12 14:25 ` Ferruh Yigit
2024-01-12 12:29 ` Morten Brørup
2024-01-12 14:29 ` Ferruh Yigit
2024-01-18 9:06 ` Jerin Jacob
2024-01-12 12:33 ` Konstantin Ananyev
2024-01-16 6:37 ` Jerin Jacob [this message]
2024-01-18 10:17 ` Konstantin Ananyev
2024-01-18 11:21 ` Jerin Jacob
2024-01-18 13:36 ` Morten Brørup
2024-01-19 9:52 ` Konstantin Ananyev
2024-01-19 10:32 ` Morten Brørup
2024-01-12 16:52 ` Stephen Hemminger
2024-01-18 9:47 ` [dpdk-dev] [v2] " jerinj
2024-01-22 13:00 ` Konstantin Ananyev
2024-01-23 11:46 ` Ferruh Yigit
2024-02-07 20:30 ` Ferruh Yigit
2024-01-29 15:03 ` Ferruh Yigit
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=CALBAE1Nso2jMv_NwUGkMyMdKRUEStRCaj-ZT6wfrczv1s97g0w@mail.gmail.com \
--to=jerinjacobk@gmail.com \
--cc=aboyer@pensando.io \
--cc=ajit.khaparde@broadcom.com \
--cc=andrew.rybchenko@oktetlabs.ru \
--cc=asomalap@amd.com \
--cc=beilei.xing@intel.com \
--cc=bruce.richardson@intel.com \
--cc=chas3@att.com \
--cc=chenbo.xia@intel.com \
--cc=ciara.loftus@intel.com \
--cc=cloud.wangxiaoyun@huawei.com \
--cc=cristian.dumitrescu@intel.com \
--cc=dev@dpdk.org \
--cc=dsinghrawat@marvell.com \
--cc=ed.czeck@atomicrules.com \
--cc=evgenys@amazon.com \
--cc=ferruh.yigit@amd.com \
--cc=ferruh.yigit@xilinx.com \
--cc=g.singh@nxp.com \
--cc=grive@u256.net \
--cc=haiyue.wang@intel.com \
--cc=heinrich.kuhn@corigine.com \
--cc=hemant.agrawal@nxp.com \
--cc=hkalra@marvell.com \
--cc=humin29@huawei.com \
--cc=hyonkim@cisco.com \
--cc=igorch@amazon.com \
--cc=irusskikh@marvell.com \
--cc=jasvinder.singh@intel.com \
--cc=jerinj@marvell.com \
--cc=jgrajcia@cisco.com \
--cc=jianwang@trustnetic.com \
--cc=jiawenwu@trustnetic.com \
--cc=jingjing.wu@intel.com \
--cc=john.miller@atomicrules.com \
--cc=johndale@cisco.com \
--cc=keith.wiles@intel.com \
--cc=kirankumark@marvell.com \
--cc=konstantin.ananyev@huawei.com \
--cc=linville@tuxdriver.com \
--cc=lironh@marvell.com \
--cc=longli@microsoft.com \
--cc=matan@nvidia.com \
--cc=matt.peters@windriver.com \
--cc=maxime.coquelin@redhat.com \
--cc=mk@semihalf.com \
--cc=mtetsuyah@gmail.com \
--cc=mw@semihalf.com \
--cc=ndabilpuram@marvell.com \
--cc=pnalla@marvell.com \
--cc=qi.z.zhang@intel.com \
--cc=qiming.yang@intel.com \
--cc=radhac@marvell.com \
--cc=rahul.lakkireddy@chelsio.com \
--cc=rmody@marvell.com \
--cc=rosen.xu@intel.com \
--cc=sachin.saxena@oss.nxp.com \
--cc=shaibran@amazon.com \
--cc=shepard.siegel@atomicrules.com \
--cc=shshaikh@marvell.com \
--cc=skori@marvell.com \
--cc=skoteshwar@marvell.com \
--cc=somnath.kotur@broadcom.com \
--cc=spinler@cesnet.cz \
--cc=steven.webster@windriver.com \
--cc=sthemmin@microsoft.com \
--cc=thomas@monjalon.net \
--cc=vburru@marvell.com \
--cc=viacheslavo@nvidia.com \
--cc=william.xuanziyang@huawei.com \
--cc=xiao.w.wang@intel.com \
--cc=yisen.zhuang@huawei.com \
--cc=yongwang@vmware.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).