netdev - Re: [PATCH net-next RFC v4 04/15] devlink: Add reload actions stats to dev get

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Date:   Tue, 15 Sep 2020 15:31:38 +0300
From:   Moshe Shemesh <moshe@...dia.com>
To:     Jiri Pirko <jiri@...nulli.us>, Ido Schimmel <idosch@...sch.org>
CC:     Moshe Shemesh <moshe@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jiri Pirko <jiri@...lanox.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next RFC v4 04/15] devlink: Add reload actions stats
 to dev get


On 9/15/2020 10:44 AM, Jiri Pirko wrote:
> Tue, Sep 15, 2020 at 08:45:19AM CEST, idosch@...sch.org wrote:
>> On Mon, Sep 14, 2020 at 03:45:00PM +0200, Jiri Pirko wrote:
>>> Mon, Sep 14, 2020 at 08:07:51AM CEST, moshe@...lanox.com wrote:
>>>> Expose devlink reload actions stats to the user through devlink dev
>>>> get command.
>>>>
>>>> Examples:
>>>> $ devlink dev show
>>>> pci/0000:82:00.0:
>>>>   reload_action_stats:
>>>>     driver_reinit 2
>>>>     fw_activate 1
>>>>     driver_reinit_no_reset 0
>>>>     fw_activate_no_reset 0
>>>> pci/0000:82:00.1:
>>>>   reload_action_stats:
>>>>     driver_reinit 1
>>>>     fw_activate 1
>>>>     driver_reinit_no_reset 0
>>>>     fw_activate_no_reset 0
>>> I would rather have something like:
>>>     stats:
>>>       reload_action:
>>>         driver_reinit 1
>>>         fw_activate 1
>>>         driver_reinit_no_reset 0
>>>         fw_activate_no_reset 0
>>>
>>> Then we can easily extend and add other stats in the tree.


Sure, I will add it.

>>>
>>> Also, I wonder if these stats could be somehow merged with Ido's metrics
>>> work:
>>> https://github.com/idosch/linux/commits/submit/devlink_metric_rfc_v1
>>>
>>> Ido, would it make sense?
>> I guess. My original idea for devlink-metric was to expose
>> design-specific metrics to user space where the entity registering the
>> metrics is the device driver. In this case the entity would be devlink
>> itself and it would be auto-registered for each device.
> Yeah, the usecase is different, but it is still stats, right.
>
>
>>>
>>>> $ devlink dev show -jp
>>>> {
>>>>     "dev": {
>>>>         "pci/0000:82:00.0": {
>>>>             "reload_action_stats": [ {
>>>>                     "driver_reinit": 2
>>>>                 },{
>>>>                     "fw_activate": 1
>>>>                 },{
>>>>                     "driver_reinit_no_reset": 0
>>>>                 },{
>>>>                     "fw_activate_no_reset": 0
>>>>                 } ]
>>>>         },
>>>>         "pci/0000:82:00.1": {
>>>>             "reload_action_stats": [ {
>>>>                     "driver_reinit": 1
>>>>                 },{
>>>>                     "fw_activate": 1
>>>>                 },{
>>>>                     "driver_reinit_no_reset": 0
>>>>                 },{
>>>>                     "fw_activate_no_reset": 0
>>>>                 } ]
>>>>         }
>>>>     }
>>>> }
>>>>
>>> [..]