DPDK patches and discussions
 help / color / mirror / Atom feed
From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
To: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
	"Yigit, Ferruh" <ferruh.yigit@intel.com>,
	Lijun Ou <oulijun@huawei.com>,
	"thomas@monjalon.net" <thomas@monjalon.net>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
	"linuxarm@openeuler.org" <linuxarm@openeuler.org>,
	Andrew Rybchenko <arybchenko@solarflare.com>,
	David Marchand <david.marchand@redhat.com>,
	Ray Kinsella <mdr@ashroe.eu>, Luca Boccassi <bluca@debian.org>
Subject: Re: [dpdk-dev] [PATCH] ethdev: add queue state when retrieve queue information
Date: Mon, 22 Mar 2021 15:45:46 +0000	[thread overview]
Message-ID: <DM6PR11MB4491E406B29398FA7EB9720F9A659@DM6PR11MB4491.namprd11.prod.outlook.com> (raw)
In-Reply-To: <a98109cb-f664-2201-a1d6-97a5aba8015b@oktetlabs.ru>



> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Andrew Rybchenko
> Sent: Monday, March 22, 2021 2:49 PM
> To: Yigit, Ferruh <ferruh.yigit@intel.com>; Lijun Ou <oulijun@huawei.com>; thomas@monjalon.net
> Cc: dev@dpdk.org; linuxarm@openeuler.org; Andrew Rybchenko <arybchenko@solarflare.com>; David Marchand
> <david.marchand@redhat.com>; Ray Kinsella <mdr@ashroe.eu>; Luca Boccassi <bluca@debian.org>
> Subject: Re: [dpdk-dev] [PATCH] ethdev: add queue state when retrieve queue information
> 
> On 3/22/21 12:22 PM, Ferruh Yigit wrote:
> > On 3/18/2021 12:25 PM, Lijun Ou wrote:
> >> Currently, upper-layer application could get queue state only
> >> through pointers such as dev->data->tx_queue_state[queue_id],
> >> this is not the recommended way to access it. So this patch
> >> add get queue state when call rte_eth_rx_queue_info_get and
> >> rte_eth_tx_queue_info_get API.
> >>
> >> Note: The hairpin queue is not supported with above
> >> rte_eth_*x_queue_info_get, so the queue state could be
> >> RTE_ETH_QUEUE_STATE_STARTED or RTE_ETH_QUEUE_STATE_STOPPED.
> >> Note: After add queue_state field, the 'struct rte_eth_rxq_info' size
> >> remains 128B, and the 'struct rte_eth_txq_info' size remains 64B, so
> >> it could be ABI compatible.
> >>
> >> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> >> Signed-off-by: Lijun Ou <oulijun@huawei.com>
> >
> > <...>
> >
> >> diff --git a/lib/librte_ethdev/rte_ethdev.h
> >> b/lib/librte_ethdev/rte_ethdev.h
> >> index efda313..3b83c5a 100644
> >> --- a/lib/librte_ethdev/rte_ethdev.h
> >> +++ b/lib/librte_ethdev/rte_ethdev.h
> >> @@ -1591,6 +1591,8 @@ struct rte_eth_rxq_info {
> >>       uint8_t scattered_rx;       /**< scattered packets RX supported. */
> >>       uint16_t nb_desc;           /**< configured number of RXDs. */
> >>       uint16_t rx_buf_size;       /**< hardware receive buffer size. */
> >> +    /**< Queues state: STARTED(1) / STOPPED(0). */
> >> +    uint8_t queue_state;
> >>   } __rte_cache_min_aligned;
> >>     /**
> >> @@ -1600,6 +1602,8 @@ struct rte_eth_rxq_info {
> >>   struct rte_eth_txq_info {
> >>       struct rte_eth_txconf conf; /**< queue config parameters. */
> >>       uint16_t nb_desc;           /**< configured number of TXDs. */
> >> +    /**< Queues state: STARTED(1) / STOPPED(0). */
> >> +    uint8_t queue_state;
> >>   } __rte_cache_min_aligned;
> >>     /* Generic Burst mode flag definition, values can be ORed. */
> >>
> >
> > This is causing an ABI warning [1], but I guess it is safe since the
> > size of the struct is not changing (cache align). Adding a few more
> > people to comment.
> >
> >
> > [1]
> > https://travis-ci.com/github/ovsrobot/dpdk/builds/220497651
> 
> Frankly speaking I dislike addition of queue_state as uint8_t.
> IMHO it should be either 'bool started' or enum to support more
> states in the future if we need.

I think we already have set of defines for it:
lib/librte_ethdev/rte_ethdev_driver.h:925:#define RTE_ETH_QUEUE_STATE_STOPPED 0
lib/librte_ethdev/rte_ethdev_driver.h:926:#define RTE_ETH_QUEUE_STATE_STARTED 1
lib/librte_ethdev/rte_ethdev_driver.h:927:#define RTE_ETH_QUEUE_STATE_HAIRPIN 2

If we want to publish it, then might be enough just move these macros to rte_ethdev.h or so.

About uint8_t vs enum - yes, in principle enum would be a bit nicer,
but right now rte_eth_dev_data.(rx|tx)_queue_state[]  itself is an array of uint8_t.
So probably not much point to waste extra 3B in rte_eth_(rxq|txq)_info.
Unless in future will want to change it in struct rte_eth_dev_data too
(or even hide it inside dev private queue data). 
  



  reply	other threads:[~2021-03-22 15:45 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-18 12:25 Lijun Ou
2021-03-22  9:22 ` Ferruh Yigit
2021-03-22  9:38   ` Kinsella, Ray
2021-03-22  9:39   ` oulijun
2021-03-22 14:49   ` Andrew Rybchenko
2021-03-22 15:45     ` Ananyev, Konstantin [this message]
2021-03-22 16:02       ` Andrew Rybchenko
2021-03-22 16:53         ` Ananyev, Konstantin
2021-03-22 17:07           ` Andrew Rybchenko
2021-03-22 18:53             ` Ananyev, Konstantin
2021-03-23 10:13               ` Ferruh Yigit
2021-03-23 10:19                 ` Ferruh Yigit
2021-03-23 11:07                 ` Ananyev, Konstantin
2021-03-25 10:01       ` oulijun
2021-03-25 10:18         ` Ananyev, Konstantin
2021-03-25 11:09 ` [dpdk-dev] [PATCH V2] " Lijun Ou
2021-04-06  0:49   ` oulijun
2021-04-06  1:55     ` Stephen Hemminger
2021-04-14 10:09       ` Ferruh Yigit
2021-04-06 14:02   ` Ananyev, Konstantin
2021-04-14 10:40     ` Ferruh Yigit
2021-04-14 10:56       ` Ananyev, Konstantin
2021-04-15  2:40   ` [dpdk-dev] [PATCH V3] " Lijun Ou
2021-04-15 12:33     ` Ferruh Yigit
2021-04-15 12:36       ` Thomas Monjalon
2021-04-15 12:45         ` Ferruh Yigit
2021-04-15 13:34           ` Thomas Monjalon
2021-04-16  0:58           ` [dpdk-dev] [Linuxarm] " oulijun
2021-04-16  7:31             ` Ferruh Yigit
2021-04-16  8:46     ` [dpdk-dev] [PATCH V4] " Lijun Ou
2021-04-16  8:58       ` Thomas Monjalon
2021-04-16  9:41         ` Ferruh Yigit
2021-04-16  9:57           ` Thomas Monjalon
2021-04-23 11:08             ` Kinsella, Ray
2021-04-25 16:42               ` Thomas Monjalon
2021-04-26  9:48                 ` Kinsella, Ray
2021-04-16  9:55         ` oulijun
2021-04-16  9:19       ` Ananyev, Konstantin
2021-04-17  3:09       ` [dpdk-dev] [PATCH V5] " Lijun Ou
2021-04-17 22:00         ` Ferruh Yigit
2021-04-19  1:39           ` oulijun
2021-04-19  2:04           ` oulijun
2021-04-19  2:03         ` [dpdk-dev] [PATCH V6] " Lijun Ou
2021-04-19  8:41           ` Thomas Monjalon
2021-04-19  8:58             ` oulijun
2021-04-19  8:57           ` [dpdk-dev] [PATCH v7] " Lijun Ou
2021-04-19  9:03             ` Thomas Monjalon
2021-04-19 10:48               ` Ferruh Yigit
2021-04-23 11:17         ` [dpdk-dev] [PATCH V5] " Kinsella, Ray
2021-04-23 11:26           ` Ananyev, Konstantin
2021-04-23 15:43             ` Kinsella, Ray

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=DM6PR11MB4491E406B29398FA7EB9720F9A659@DM6PR11MB4491.namprd11.prod.outlook.com \
    --to=konstantin.ananyev@intel.com \
    --cc=andrew.rybchenko@oktetlabs.ru \
    --cc=arybchenko@solarflare.com \
    --cc=bluca@debian.org \
    --cc=david.marchand@redhat.com \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@intel.com \
    --cc=linuxarm@openeuler.org \
    --cc=mdr@ashroe.eu \
    --cc=oulijun@huawei.com \
    --cc=thomas@monjalon.net \
    /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).