netdev - Re: [PATCH v2 net-next 21/26] ice: add XDP and XSK generic per-channel statistics

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Message-ID: <87y257ot47.fsf@nvidia.com>
Date:   Mon, 29 Nov 2021 16:54:00 +0100
From:   Petr Machata <petrm@...dia.com>
To:     Petr Machata <petrm@...dia.com>
CC:     Jakub Kicinski <kuba@...nel.org>, Ido Schimmel <idosch@...sch.org>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        "Alexander Lobakin" <alexandr.lobakin@...el.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S. Miller" <davem@...emloft.net>,
        "Jesse Brandeburg" <jesse.brandeburg@...el.com>,
        Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Jonathan Corbet <corbet@....net>,
        "Shay Agroskin" <shayagr@...zon.com>,
        Arthur Kiyanovski <akiyano@...zon.com>,
        "David Arinzon" <darinzon@...zon.com>,
        Noam Dagan <ndagan@...zon.com>,
        "Saeed Bishara" <saeedb@...zon.com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        "Claudiu Manoil" <claudiu.manoil@....com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Russell King <linux@...linux.org.uk>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Edward Cree <ecree.xilinx@...il.com>,
        "Martin Habets" <habetsm.xilinx@...il.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        "Martin KaFai Lau" <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        KP Singh <kpsingh@...nel.org>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Yajun Deng <yajun.deng@...ux.dev>,
        Sergey Ryazanov <ryazanov.s.a@...il.com>,
        David Ahern <dsahern@...nel.org>,
        Andrei Vagin <avagin@...il.com>,
        Johannes Berg <johannes.berg@...el.com>,
        "Vladimir Oltean" <vladimir.oltean@....com>,
        Cong Wang <cong.wang@...edance.com>, <netdev@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-rdma@...r.kernel.org>, <bpf@...r.kernel.org>,
        <virtualization@...ts.linux-foundation.org>, <nikolay@...dia.com>
Subject: Re: [PATCH v2 net-next 21/26] ice: add XDP and XSK generic
 per-channel statistics


Petr Machata <petrm@...dia.com> writes:

> Jakub Kicinski <kuba@...nel.org> writes:
>
>> On Sun, 28 Nov 2021 19:54:53 +0200 Ido Schimmel wrote:
>>> # ip stats set dev swp1 hw_stats on
>>
>> Does it belong on the switch port? Not the netdev we want to track?
>
> Yes, it does, and is designed that way. That was just muscle memory
> typing that "swp1" above :)

And by "yes, it does", I obviously meant "no, it doesn't". It does
belong to the device that you want counters for.

> You would do e.g. "ip stats set dev swp1.200 hw_stats on" or, "dev br1",
> or something like that.