DPDK patches and discussions
 help / color / mirror / Atom feed
From: Thomas Monjalon <thomas@monjalon.net>
To: Ferruh Yigit <ferruh.yigit@intel.com>
Cc: "Min Hu (Connor)" <humin29@huawei.com>,
	"techboard@dpdk.org" <techboard@dpdk.org>,
	stephen@networkplumber.org, bruce.richardson@intel.com,
	"jerinj@marvell.com" <jerinj@marvell.com>,
	Ray Kinsella <mdr@ashroe.eu>,
	dev@dpdk.org
Subject: Re: [dpdk-dev] [dpdk-techboard] [PATCH V5 1/2] dpdk: resolve compiling errors for per-queue stats
Date: Mon, 28 Sep 2020 17:24:26 +0200	[thread overview]
Message-ID: <9656261.dg2788STim@thomas> (raw)
In-Reply-To: <baccf0a3-c6a3-5ead-caf1-eb3b34c60401@intel.com>

28/09/2020 15:53, Ferruh Yigit:
> On 9/28/2020 10:16 AM, Thomas Monjalon wrote:
> > 28/09/2020 10:59, Ferruh Yigit:
> >> On 9/27/2020 4:16 AM, Min Hu (Connor) wrote:
> >>> From: Huisong Li <lihuisong@huawei.com>
> >>>
> >>> Currently, only statistics of rx/tx queues with queue_id less than
> >>> RTE_ETHDEV_QUEUE_STAT_CNTRS can be displayed. If there is a certain
> >>> application scenario that it needs to use 256 or more than 256 queues
> >>> and display all statistics of rx/tx queue. At this moment, we have to
> >>> change the macro to be equaled to the queue number.
> >>>
> >>> However, modifying the macro to be greater than 256 will trigger
> >>> many errors and warnings from test-pmd, PMD drivers and librte_ethdev
> >>> during compiling dpdk project. But it is possible and permitted that
> >>> rx/tx queue number is greater than 256 and all statistics of rx/tx
> >>> queue need to be displayed. In addition, the data type of rx/tx queue
> >>> number in rte_eth_dev_configure API is 'uint16_t'. So It is unreasonable
> >>> to use the 'uint8_t' type for variables that control which per-queue
> >>> statistics can be displayed.
> > 
> > The explanation is too much complex and misleading.
> > You mean you cannot increase RTE_ETHDEV_QUEUE_STAT_CNTRS
> > above 256 because it is an 8-bit type?
> > 
> > [...]
> >>> --- a/lib/librte_ethdev/rte_ethdev.h
> >>> +++ b/lib/librte_ethdev/rte_ethdev.h
> >>>    int rte_eth_dev_set_tx_queue_stats_mapping(uint16_t port_id,
> >>> -		uint16_t tx_queue_id, uint8_t stat_idx);
> >>> +		uint16_t tx_queue_id, uint16_t stat_idx);
> > [...]
> >>>    int rte_eth_dev_set_rx_queue_stats_mapping(uint16_t port_id,
> >>>    					   uint16_t rx_queue_id,
> >>> -					   uint8_t stat_idx);
> >>> +					   uint16_t stat_idx);
> > [...]
> >> cc'ed tech-board,
> >>
> >> The patch breaks the ethdev ABI without a deprecation notice from previous
> >> release(s).
> >>
> >> It is mainly a fix to the port_id storage type, which we have updated from
> >> uint8_t to uint16_t in past but some seems remained for
> >> 'rte_eth_dev_set_tx_queue_stats_mapping()' &
> >> 'rte_eth_dev_set_rx_queue_stats_mapping()' APIs.
> > 
> > No, it is not related to the port id, but the number of limited stats.
> > 
> 
> Right, it is not related to the port id, it is fixing the storage type for index 
> used to map the queue stats.
> 
> >> Since the ethdev library already heavily breaks the ABI this release, I am for
> >> getting this fix, instead of waiting the fix for one more year.
> > 
> > If stats can be managed for more than 256 queues, I think it means
> > it is not limited. In this case, we probably don't need the API
> > *_queue_stats_mapping which was invented for a limitation of ixgbe.
> > 
> > The problem is probably somewhere else (in testpmd),
> > that's why I am against this patch.
> > 
> 
> This patch is not to fix queue stats mapping, I agree there are problems related 
> to it, already shared as comment to this set.
> 
> But this patch is to fix the build errors when 'RTE_ETHDEV_QUEUE_STAT_CNTRS' 
> needs to set more than 255. Where the build errors seems around the 
> stats_mapping APIs.

It is not said this API is supposed to manage more than 256 queues mapping.
In general we should not need this API.
I think it is solving the wrong problem.



  reply	other threads:[~2020-09-28 15:24 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-31  3:41 [dpdk-dev] [RFC 1/2] Description: lib/ethdev: change data type in tc_rxq and tc_txq Min Hu(Connor)
2020-08-31  3:41 ` [dpdk-dev] [RFC 2/2] Description: dpdk: fix compiling errors for more than 256 per-queue statistics Min Hu(Connor)
2020-09-01  1:33 ` [dpdk-dev] [RFC 1/2] ethdev: change data type in TC rxq and TC txq Min Hu (Connor)
2020-09-01  1:33   ` [dpdk-dev] [RFC 2/2] ethdev: fix compiling errors for per-queue statistics Min Hu (Connor)
2020-09-01  2:23     ` Stephen Hemminger
2020-09-01 11:52   ` [dpdk-dev] [PATCH 0/4] ethdev: change the queue ID type Min Hu (Connor)
2020-09-01 11:52     ` [dpdk-dev] [PATCH 1/4] ethdev: change data type in TC rxq and TC txq Min Hu (Connor)
2020-09-04 11:32       ` [dpdk-dev] [PATCH V2 0/4] ethdev: change the queue ID type Min Hu (Connor)
2020-09-04 11:32         ` [dpdk-dev] [PATCH V2 1/4] ethdev: fix compiling errors for per-queue statistics Min Hu (Connor)
2020-09-04 18:04           ` Ferruh Yigit
2020-09-04 18:31           ` Ferruh Yigit
2020-09-05 16:51             ` Thomas Monjalon
2020-09-23  2:31             ` Min Hu (Connor)
2020-09-23  9:18               ` Ferruh Yigit
2020-09-25  8:58                 ` Min Hu (Connor)
2020-09-25  9:36                   ` Ferruh Yigit
2020-09-23 12:59           ` [dpdk-dev] [PATCH V3 0/4] change data type in TC queue Min Hu (Connor)
2020-09-23 12:59             ` [dpdk-dev] [PATCH V3 1/4] dpdk: fix compiling errors for per-queue statistics Min Hu (Connor)
2020-09-23 13:00             ` [dpdk-dev] [PATCH V3 2/4] ethdev: change data type in TC rxq and TC txq Min Hu (Connor)
2020-09-23 13:00             ` [dpdk-dev] [PATCH V3 3/4] doc: announce modified field in DCB TC queue mapping Min Hu (Connor)
2020-09-23 13:00             ` [dpdk-dev] [PATCH V3 4/4] doc: announce modified in queue stats mapping API Min Hu (Connor)
2020-09-25  9:41             ` [dpdk-dev] [PATCH V3 0/4] change data type in TC queue Ferruh Yigit
2020-09-04 11:32         ` [dpdk-dev] [PATCH V2 2/4] ethdev: change data type in TC rxq and TC txq Min Hu (Connor)
2020-09-04 11:32         ` [dpdk-dev] [PATCH V2 3/4] doc: announce modified field in DCB TC queue mapping Min Hu (Connor)
2020-09-04 11:32         ` [dpdk-dev] [PATCH V2 4/4] doc: announce modified field in ethdev API Min Hu (Connor)
2020-09-04 14:33         ` [dpdk-dev] [PATCH V2 0/4] ethdev: change the queue ID type Ferruh Yigit
2020-09-09 12:36       ` [dpdk-dev] [PATCH V3 0/3] add FEC support Min Hu (Connor)
2020-09-09 12:36         ` [dpdk-dev] [PATCH V3 1/3] ethdev: introduce FEC API Min Hu (Connor)
2020-09-09 12:36         ` [dpdk-dev] [PATCH V3 2/3] net/hns3: support FEC Min Hu (Connor)
2020-09-09 12:36         ` [dpdk-dev] [PATCH V3 3/3] app/testpmd: add FEC command Min Hu (Connor)
2020-09-01 11:52     ` [dpdk-dev] [PATCH 2/4] ethdev: fix compiling errors for per-queue statistics Min Hu (Connor)
2020-09-01 16:17       ` Ferruh Yigit
2020-09-01 11:52     ` [dpdk-dev] [PATCH 3/4] doc: announce modified field in DCB TC queue mapping Min Hu (Connor)
2020-09-01 11:52     ` [dpdk-dev] [PATCH 4/4] doc: announce modified field in ethdev API Min Hu (Connor)
2020-09-01 16:14     ` [dpdk-dev] [PATCH 0/4] ethdev: change the queue ID type Ferruh Yigit
2020-09-25 12:51 ` [dpdk-dev] [PATCH V4 0/2] change data type in TC queue Min Hu (Connor)
2020-09-25 12:51   ` [dpdk-dev] [PATCH V4 1/2] dpdk: resolve compiling errors for per-queue stats Min Hu (Connor)
2020-09-25 12:51   ` [dpdk-dev] [PATCH V4 2/2] ethdev: change data type in TC rxq and TC txq Min Hu (Connor)
2020-09-25 13:14   ` [dpdk-dev] [PATCH V4 0/2] change data type in TC queue Ferruh Yigit
2020-09-27  3:16 ` [dpdk-dev] [PATCH V5 " Min Hu (Connor)
2020-09-27  3:16   ` [dpdk-dev] [PATCH V5 1/2] dpdk: resolve compiling errors for per-queue stats Min Hu (Connor)
2020-09-28  8:59     ` Ferruh Yigit
2020-09-28  9:16       ` [dpdk-dev] [dpdk-techboard] " Thomas Monjalon
2020-09-28 12:00         ` Ananyev, Konstantin
2020-09-28 13:47         ` Min Hu (Connor)
2020-09-28 15:35           ` Thomas Monjalon
2020-09-28 13:53         ` Ferruh Yigit
2020-09-28 15:24           ` Thomas Monjalon [this message]
2020-09-28 15:43             ` Stephen Hemminger
2020-10-05 12:23               ` Ferruh Yigit
2020-10-06  8:33                 ` Olivier Matz
2020-10-09 20:32                   ` Ferruh Yigit
2020-10-10  8:09                     ` Thomas Monjalon
2020-10-12 17:02                       ` Ferruh Yigit
2020-09-29  4:49           ` Min Hu (Connor)
2020-09-29  9:33             ` Thomas Monjalon
2020-09-29 13:46               ` Min Hu (Connor)
2020-09-28 11:52       ` Ananyev, Konstantin
2020-09-30  8:34       ` [dpdk-dev] " Kinsella, Ray
2020-09-27  3:16   ` [dpdk-dev] [PATCH V5 2/2] ethdev: change data type in TC rxq and TC txq Min Hu (Connor)
2020-09-28  9:04     ` Ferruh Yigit
2020-09-28  9:21       ` [dpdk-dev] [dpdk-techboard] " Thomas Monjalon
2020-10-05 12:26         ` Ferruh Yigit
2020-10-06 12:04           ` 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=9656261.dg2788STim@thomas \
    --to=thomas@monjalon.net \
    --cc=bruce.richardson@intel.com \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@intel.com \
    --cc=humin29@huawei.com \
    --cc=jerinj@marvell.com \
    --cc=mdr@ashroe.eu \
    --cc=stephen@networkplumber.org \
    --cc=techboard@dpdk.org \
    /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).