DPDK patches and discussions
 help / color / mirror / Atom feed
From: Bing Zhao <bingz@nvidia.com>
To: Ori Kam <orika@nvidia.com>,
	NBU-Contact-Thomas Monjalon <thomas@monjalon.net>,
	"ferruh.yigit@intel.com" <ferruh.yigit@intel.com>,
	"arybchenko@solarflare.com" <arybchenko@solarflare.com>,
	"mdr@ashroe.eu" <mdr@ashroe.eu>,
	"nhorman@tuxdriver.com" <nhorman@tuxdriver.com>,
	"bernard.iremonger@intel.com" <bernard.iremonger@intel.com>,
	"beilei.xing@intel.com" <beilei.xing@intel.com>,
	"wenzhuo.lu@intel.com" <wenzhuo.lu@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 2/4] ethdev: add new attributes to hairpin config
Date: Wed, 7 Oct 2020 11:32:31 +0000
Message-ID: <CY4PR1201MB00728DE1073E7AFA425107D0D00A0@CY4PR1201MB0072.namprd12.prod.outlook.com> (raw)
In-Reply-To: <MN2PR12MB428611074A676DB2C57C1B84D60F0@MN2PR12MB4286.namprd12.prod.outlook.com>

Hi Ori,

> -----Original Message-----
> From: Ori Kam <orika@nvidia.com>
> Sent: Sunday, October 4, 2020 5:22 PM
> To: Bing Zhao <bingz@nvidia.com>; NBU-Contact-Thomas Monjalon
> <thomas@monjalon.net>; ferruh.yigit@intel.com;
> arybchenko@solarflare.com; mdr@ashroe.eu; nhorman@tuxdriver.com;
> bernard.iremonger@intel.com; beilei.xing@intel.com;
> wenzhuo.lu@intel.com
> Cc: dev@dpdk.org
> Subject: RE: [PATCH 2/4] ethdev: add new attributes to hairpin
> config
> 
> Hi Bing,
> 
> PSB,
> Best,
> Ori
> 
> > -----Original Message-----
> > From: Bing Zhao <bingz@nvidia.com>
> > Sent: Thursday, October 1, 2020 3:26 AM
> > Subject: [PATCH 2/4] ethdev: add new attributes to hairpin config
> >
> > To support two ports hairpin mode and keep the backward
> compatibility
> > for the application, two new attribute members of hairpin queue
> config
> > structure are added.
> >
> > `tx_explicit` means if the application itself will insert the TX
> part
> > flow rules. If not set, PMD will insert the rules implicitly.
> > `manual_bind` means if the hairpin TX queue and peer RX queue will
> be
> > bound automatically during device start stage.
> >
> > Different TX and RX queue pairs could have different values, but
> it is
> > highly recommend that all paired queues between one egress and its
> > peer ingress ports have the same values, in order not to bring any
> > chaos to the system. The actual support of these attribute
> parameters
> > will be checked and decided by the PMD driver.
> >
> > In a single port hairpin, if both are zero without any setting,
> the
> > behavior will remain the same as before. It means no bind API
> needs to
> > be called and no TX flow rules need to be inserted manually by the
> > application.
> >
> > Signed-off-by: Bing Zhao <bingz@nvidia.com>
> > ---
> >  lib/librte_ethdev/rte_ethdev.h | 18 ++++++++++++++++++
> >  1 file changed, 18 insertions(+)
> >
> > diff --git a/lib/librte_ethdev/rte_ethdev.h
> > b/lib/librte_ethdev/rte_ethdev.h index c3fb684..0cabff0 100644
> > --- a/lib/librte_ethdev/rte_ethdev.h
> > +++ b/lib/librte_ethdev/rte_ethdev.h
> > @@ -1027,6 +1027,21 @@ struct rte_eth_hairpin_cap {
> >
> >  #define RTE_ETH_MAX_HAIRPIN_PEERS 32
> >
> > +/*
> > + * Hairpin queue attribute parameters.
> > + * Each TX queue and peer RX queue should have the same value.
> > + * Default value 0 is for backward-compatibility, the same
> behaviors
> > +should
> > + * remain if the value is not set (0).
> > + */
> > +/**< Hairpin queues will be bound automatically */
> > +#define RTE_ETH_HAIRPIN_BIND_AUTO		(0)
> > +/**< Hairpin queues will be bound manually with bind API */
> > +#define RTE_ETH_HAIRPIN_BIND_MANUAL		(1)
> > +/**< Hairpin TX part flow rule will be inserted implicitly by PMD
> */
> > +#define RTE_ETH_HAIRPIN_TXRULE_IMPLICIT		(0)
> > +/**< Hairpin TX part flow rule will be inserted explicitly by APP
> */
> > +#define RTE_ETH_HAIRPIN_TXRULE_EXPLICIT		(1)
> > +
> 
> Why do you need those defines if you are using bit fields?

I will remove this and add the description of the modes in the document.

> 
> >  /**
> >   * @warning
> >   * @b EXPERIMENTAL: this API may change, or be removed, without
> prior
> > notice @@ -1046,6 +1061,9 @@ struct rte_eth_hairpin_peer {
> >   */
> >  struct rte_eth_hairpin_conf {
> >  	uint16_t peer_count; /**< The number of peers. */
> > +	uint32_t reserved : 30; /**< Reserved bits. */
> > +	uint32_t tx_explicit : 1; /**< Explicit TX flow rule mode. */
> > +	uint32_t manual_bind : 1; /**< Manually bind hairpin queues.
> */
> 
> Why not place the new bits at the end?

By using uint16_t bit fields, there will be some warnings by the compiler and it is not standard.
I prefer to change the "uint16_t peer_count" into "uint32_t peer_count:16" to use the gap before the next structure.
Or yes, I can move it to the end of this current structure.

> Also why do you place the reserved first?

Thanks, I will move it to the end of the u32 like other structure definitions.

> 
> >  	struct rte_eth_hairpin_peer
> peers[RTE_ETH_MAX_HAIRPIN_PEERS];  };
> >
> > --
> > 2.5.5

Thanks


  reply	other threads:[~2020-10-07 11:32 UTC|newest]

Thread overview: 81+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-11  4:51 [dpdk-dev] [RFC] introduce support for hairpin between two ports Bing Zhao
2020-09-13 15:48 ` [dpdk-dev] [RFC PATCH v2 0/4] " Bing Zhao
2020-09-13 15:48   ` [dpdk-dev] [RFC PATCH v2 1/4] ethdev: add support for flow item transmit queue Bing Zhao
2020-09-13 15:48   ` [dpdk-dev] [RFC PATCH v2 2/4] testpmd: add item transmit queue in flow CLI Bing Zhao
2020-09-13 15:48   ` [dpdk-dev] [RFC PATCH v2 3/4] ethdev: add hairpin bind APIs Bing Zhao
2020-09-13 15:49   ` [dpdk-dev] [RFC PATCH v2 4/4] ethdev: add new attributes to hairpin queues config Bing Zhao
2020-10-01  0:25   ` [dpdk-dev] [PATCH 0/4] introduce support for hairpin between two ports Bing Zhao
2020-10-01  0:25     ` [dpdk-dev] [PATCH 1/4] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-04  9:20       ` Ori Kam
2020-10-07 11:21         ` Bing Zhao
2020-10-07 11:42           ` Ori Kam
2020-10-01  0:26     ` [dpdk-dev] [PATCH 2/4] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-04  9:22       ` Ori Kam
2020-10-07 11:32         ` Bing Zhao [this message]
2020-10-01  0:26     ` [dpdk-dev] [PATCH 3/4] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-04  9:34       ` Ori Kam
2020-10-07 11:34         ` Bing Zhao
2020-10-01  0:26     ` [dpdk-dev] [PATCH 4/4] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-04  9:39       ` Ori Kam
2020-10-07 11:36         ` Bing Zhao
2020-10-04  9:45     ` [dpdk-dev] [PATCH 0/4] introduce support for hairpin between two ports Ori Kam
2020-10-08  8:51     ` [dpdk-dev] [PATCH v2 0/6] " Bing Zhao
2020-10-08  8:51       ` [dpdk-dev] [PATCH v2 1/6] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-08  9:07         ` Ori Kam
2020-10-08  8:51       ` [dpdk-dev] [PATCH v2 2/6] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-08  9:23         ` Ori Kam
2020-10-08  8:51       ` [dpdk-dev] [PATCH v2 3/6] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-08  9:40         ` Ori Kam
2020-10-08  8:51       ` [dpdk-dev] [PATCH v2 4/6] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-08  9:44         ` Ori Kam
2020-10-08  8:51       ` [dpdk-dev] [PATCH v2 5/6] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-08  9:45         ` Ori Kam
2020-10-08  8:51       ` [dpdk-dev] [PATCH v2 6/6] doc: update for two ports hairpin mode Bing Zhao
2020-10-08  9:47         ` Ori Kam
2020-10-08 12:05       ` [dpdk-dev] [PATCH v3 0/6] introduce support for hairpin between two ports Bing Zhao
2020-10-08 12:05         ` [dpdk-dev] [PATCH v3 1/6] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-14 14:35           ` Thomas Monjalon
2020-10-15  2:56             ` Bing Zhao
2020-10-15  7:31               ` Thomas Monjalon
2020-10-08 12:05         ` [dpdk-dev] [PATCH v3 2/6] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-12 21:37           ` Thomas Monjalon
2020-10-13 12:29             ` Bing Zhao
2020-10-13 12:41               ` Thomas Monjalon
2020-10-13 13:21                 ` Bing Zhao
2020-10-08 12:05         ` [dpdk-dev] [PATCH v3 3/6] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-08 12:31           ` Ori Kam
2020-10-08 12:05         ` [dpdk-dev] [PATCH v3 4/6] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-08 12:05         ` [dpdk-dev] [PATCH v3 5/6] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-08 12:05         ` [dpdk-dev] [PATCH v3 6/6] doc: update for two ports hairpin mode Bing Zhao
2020-10-12 21:30           ` Thomas Monjalon
2020-10-13  1:13             ` Bing Zhao
2020-10-13  6:37               ` Thomas Monjalon
2020-10-13  6:40                 ` Bing Zhao
2020-10-13 16:19         ` [dpdk-dev] [PATCH v4 0/5] introduce support for hairpin between two ports Bing Zhao
2020-10-13 16:19           ` [dpdk-dev] [PATCH v4 1/5] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-14 14:43             ` Thomas Monjalon
2020-10-15  2:59               ` Bing Zhao
2020-10-13 16:19           ` [dpdk-dev] [PATCH v4 2/5] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-13 16:19           ` [dpdk-dev] [PATCH v4 3/5] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-14 15:02             ` Thomas Monjalon
2020-10-15  4:03               ` Bing Zhao
2020-10-13 16:19           ` [dpdk-dev] [PATCH v4 4/5] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-13 16:19           ` [dpdk-dev] [PATCH v4 5/5] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-15  5:35     ` [dpdk-dev] [PATCH v5 0/5] introduce support for hairpin between two ports Bing Zhao
2020-10-15  5:35       ` [dpdk-dev] [PATCH v5 1/5] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-15 10:34         ` Thomas Monjalon
2020-10-15 11:39           ` Bing Zhao
2020-10-15  5:35       ` [dpdk-dev] [PATCH v5 2/5] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-15 10:46         ` Thomas Monjalon
2020-10-15 13:45           ` Bing Zhao
2020-10-15  5:35       ` [dpdk-dev] [PATCH v5 3/5] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-15  5:35       ` [dpdk-dev] [PATCH v5 4/5] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-15  5:35       ` [dpdk-dev] [PATCH v5 5/5] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-15 13:08     ` [dpdk-dev] [PATCH v6 0/5] introduce support for hairpin between two ports Bing Zhao
2020-10-15 13:08       ` [dpdk-dev] [PATCH v6 1/5] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-15 13:08       ` [dpdk-dev] [PATCH v6 2/5] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-15 13:08       ` [dpdk-dev] [PATCH v6 3/5] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-15 13:08       ` [dpdk-dev] [PATCH v6 4/5] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-15 13:08       ` [dpdk-dev] [PATCH v6 5/5] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-15 23:03       ` [dpdk-dev] [PATCH v6 0/5] introduce support for hairpin between two ports Ferruh Yigit
2020-10-16  1:34         ` Bing Zhao

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=CY4PR1201MB00728DE1073E7AFA425107D0D00A0@CY4PR1201MB0072.namprd12.prod.outlook.com \
    --to=bingz@nvidia.com \
    --cc=arybchenko@solarflare.com \
    --cc=beilei.xing@intel.com \
    --cc=bernard.iremonger@intel.com \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@intel.com \
    --cc=mdr@ashroe.eu \
    --cc=nhorman@tuxdriver.com \
    --cc=orika@nvidia.com \
    --cc=thomas@monjalon.net \
    --cc=wenzhuo.lu@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

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ https://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git