DPDK patches and discussions
 help / color / mirror / Atom feed
From: "Min Hu (Connor)" <humin29@huawei.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>, <dev@dpdk.org>
Cc: <bruce.richardson@intel.com>, <thomas.monjalon@6wind.com>,
	<lihuisong@huawei.com>
Subject: Re: [dpdk-dev] [RFC V2 1/2] app/testpmd: fix queue stats mapping configuration
Date: Wed, 18 Nov 2020 11:39:32 +0800
Message-ID: <4ee8c31f-070b-c706-2394-5808a5f7e3a2@huawei.com> (raw)
In-Reply-To: <531504ce-0547-48c2-4e34-c2ed6cb12e57@intel.com>

HI, Ferruh,
	Ok,I will send V3 patches. thanks.

在 2020/11/12 17:52, Ferruh Yigit 写道:
> On 11/12/2020 2:28 AM, Min Hu (Connor) wrote:
>> Hi Ferruh, any suggestions?
>>
>>
>> 在 2020/11/3 14:30, Min Hu (Connor) 写道:
>>> Hi Ferruh,
>>>
>>> I agree with your proposal. But if we remove record structures, we will
>>> not be able to query the current queue stats mapping configuration. Or
>>> we can provide a query API for the PMD driver that uses the
>>> set_queue_stats_mapping API, and driver records these mapping
>>> information from user.
>>>
>>> What do you think?
>>>
> 
> Sorry for delay,
> 
> Yes that information will be lost, but since the queue stats mapping is 
> not commonly used, I think it can be OK to loose it.
> 
> As you said another option is to add a new ethdev API to get queue stats 
> mapping, but because of same reason not sure about adding it. We can add 
> it later if there is a request for it.
> 
>>>
>>> 在 2020/10/31 4:54, Ferruh Yigit 写道:
>>>> On 10/20/2020 9:26 AM, Min Hu (Connor) wrote:
>>>>> From: Huisong Li <lihuisong@huawei.com>
>>>>>
>>>>> Currently, the queue stats mapping has the following problems:
>>>>> 1) Many PMD drivers don't support queue stats mapping. But there is no
>>>>> failure message after executing the command "set stat_qmap rx 0 2 2".
>>>>> 2) Once queue mapping is set, unrelated and unmapped queues are also
>>>>> displayed.
>>>>> 3) There is no need to keep cache line alignment for
>>>>> 'struct queue_stats_mappings'.
>>>>> 4) The mapping arrays, 'tx_queue_stats_mappings_array' &
>>>>> 'rx_queue_stats_mappings_array' are global and their sizes are 
>>>>> based on
>>>>> fixed max port and queue size assumptions.
>>>>> 5) The configuration result does not take effect or can not be queried
>>>>> in real time.
>>>>>
>>>>> Therefore, we have made the following adjustments:
>>>>> 1) If PMD supports queue stats mapping, configure to driver in real 
>>>>> time
>>>>> after executing the command "set stat_qmap rx/tx ...". If not,
>>>>> the command can not be accepted.
>>>>> 2) Only display queues that mapping done by adding a new 'active' 
>>>>> field
>>>>>   in queue_stats_mappings struct.
>>>>> 3) Remove cache alignment for 'struct queue_stats_mappings'.
>>>>> 4) Add a new port_stats_mappings struct in rte_port.
>>>>> The struct contains number of rx/txq stats mapping, rx/tx
>>>>> queue_stats_mapping_enabled flag, and rx/tx queue_stats_mapping array.
>>>>> Size of queue_stats_mapping_array is set to 
>>>>> "RTE_ETHDEV_QUEUE_STAT_CNTRS"
>>>>>   to ensure that the same number of queues can be set for each port.
>>>>>
>>>>
>>>> Hi Connor,
>>>>
>>>> I think above adjustment are good, but after the decision to use 
>>>> xstats for the queue stats, what do you think about more 
>>>> simplification,
>>>>
>>>> 1)
>>>> What testpmd does is, records the queue stats mapping commands and 
>>>> registers them later on port start & forwarding start.
>>>> What happens if recording and registering completely removed?
>>>> When "set stat_qmap .." issued, it just call the ethdev APIs to do 
>>>> the mapping in device.
>>>> This lets us removing record structures, "struct port_stats_mappings 
>>>> p_stats_map"
>>>> Also can remove 'map_port_queue_stats_mapping_registers()' and its 
>>>> sub functions.
>>>>
>>>> 2)
>>>> Also lets remove "tx-queue-stats-mapping" & "rx-queue-stats-mapping" 
>>>> parameters, which enables removing 
>>>> 'parse_queue_stats_mapping_config()' function too
>>>>
>>>> 3)
>>>> Another problem is to display the queue stats, in 
>>>> 'fwd_stats_display()' & 'nic_stats_display()', there is a check if 
>>>> the queue stats mapping enable or not 
>>>> ('rx_queue_stats_mapping_enabled' & 'tx_queue_stats_mapping_enabled'),
>>>> I think displaying queue stats and queue stat mapping should be 
>>>> separate, why not drop checks for queue stats mapping and display 
>>>> queue stats for 'nb_rxq' & 'nb_txq' queues?
>>>>
>>>> Does above make sense?
>>>>
>>>>
>>>> Majority of the drivers doesn't require queue stat mapping to get 
>>>> the queue stats, lets don't pollute main usage with this requirement.
>>>>
>>>>
>>>>> Fixes: 4dccdc789bf4b ("app/testpmd: simplify handling of stats 
>>>>> mappings error")
>>>>> Fixes: 013af9b6b64f6 ("app/testpmd: various updates")
>>>>> Fixes: ed30d9b691b21 ("app/testpmd: add stats per queue")
>>>>>
>>>>> Signed-off-by: Huisong Li <lihuisong@huawei.com>
>>>>
>>>> <...>
>>>>
>>>> .
> 
> .

  reply	other threads:[~2020-11-18  3:39 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-20  8:26 [dpdk-dev] [RFC V2 0/2] fix queue stats mapping Min Hu (Connor)
2020-10-20  8:26 ` [dpdk-dev] [RFC V2 1/2] app/testpmd: fix queue stats mapping configuration Min Hu (Connor)
2020-10-30 20:54   ` Ferruh Yigit
2020-11-03  6:30     ` Min Hu (Connor)
2020-11-12  2:28       ` Min Hu (Connor)
2020-11-12  9:52         ` Ferruh Yigit
2020-11-18  3:39           ` Min Hu (Connor) [this message]
2020-11-20 11:50           ` [dpdk-dev] [RFC V4] " Min Hu (Connor)
2020-11-20 17:26             ` Ferruh Yigit
2020-11-20 23:21               ` Stephen Hemminger
2020-11-20 23:33                 ` Ferruh Yigit
2020-11-21  4:29                   ` Stephen Hemminger
2020-11-23  7:22                     ` Min Hu (Connor)
2020-11-23  9:51                     ` Ferruh Yigit
2020-11-30  8:29                       ` Min Hu (Connor)
2020-12-02 10:44                         ` Ferruh Yigit
2020-12-02 12:48                           ` [dpdk-dev] [PATCH V1] " Min Hu (Connor)
2020-12-08 15:48                             ` Ferruh Yigit
2020-12-07  1:28                           ` [dpdk-dev] [RFC V4] " Min Hu (Connor)
2020-10-20  8:26 ` [dpdk-dev] [RFC V2 2/2] app/testpmd: fix starting failed with queue-stats-mapping Min Hu (Connor)

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=4ee8c31f-070b-c706-2394-5808a5f7e3a2@huawei.com \
    --to=humin29@huawei.com \
    --cc=bruce.richardson@intel.com \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@intel.com \
    --cc=lihuisong@huawei.com \
    --cc=thomas.monjalon@6wind.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 http://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/ http://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