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Date:   Tue, 11 Aug 2020 11:58:23 +0000
From:   Eli Cohen <>
To:     "Michael S. Tsirkin" <>
CC:     Jason Wang <>,
        "" <>,
        "" <>,
        "" <>,
        "" <>,
        "" <>,
        Majd Dibbiny <>,
        "Maor Dickman" <>,
        Shahaf Shuler <>,
        "Parav Pandit" <>
Subject: RE: VDPA Debug/Statistics

On Tue, Aug 11, 2020 at 11:26:20AM +0000, Eli Cohen wrote:
> Hi All
> Currently, the only statistics we get for a VDPA instance comes from the virtio_net device instance. Since VDPA involves hardware acceleration, there can be quite a lot of information that can be fetched from the underlying device. Currently there is no generic method to fetch this information.
> One way of doing this can be to create a the host, a net device for 
> each VDPA instance, and use it to get this information or do some 
> configuration. Ethtool can be used in such a case
> I would like to hear what you think about this or maybe you have some other ideas to address this topic.
> Thanks,
> Eli

Something I'm not sure I understand is how are vdpa instances created on mellanox cards? There's a devlink command for that, is that right?
Can that be extended for stats?

Currently any VF will be probed as VDPA device. We're adding devlink support but I am not sure if devlink is suitable for displaying statistics. We will discuss internally but I wanted to know why you guys think.


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