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

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Message-ID: <20200915064519.GA5390@shredder>
Date:   Tue, 15 Sep 2020 09:45:19 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     Jiri Pirko <jiri@...nulli.us>
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 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.
> 
> 
> 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.

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