linux-kernel - 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 15:34:06 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Moshe Shemesh <moshe@...dia.com>
Cc:     Ido Schimmel <idosch@...sch.org>,
        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

Tue, Sep 15, 2020 at 02:31:38PM CEST, moshe@...dia.com wrote:
>
>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.

Could you please checkout the metrics patchset and figure out how to
merge that with your usecase?


>
>> > > 
>> > > 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
>> > > >                 } ]
>> > > >         }
>> > > >     }
>> > > > }
>> > > > 
>> > > [..]