netdev - Re: [RFC PATCH net-next v1 1/2] net: add name field to napi struct

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Message-ID: <CANn89i+kZnGHmiVoQSj4Xww7uNwhaj8+XV2C+4a_6k+T4UcY7g@mail.gmail.com>
Date:   Thu, 6 May 2021 19:35:47 +0200
From:   Eric Dumazet <edumazet@...gle.com>
To:     Yannick Vignon <yannick.vignon@....nxp.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Antoine Tenart <atenart@...nel.org>,
        Wei Wang <weiwan@...gle.com>, Taehee Yoo <ap420073@...il.com>,
        Alexander Lobakin <alobakin@...me>,
        netdev <netdev@...r.kernel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Joakim Zhang <qiangqing.zhang@....com>,
        sebastien.laveze@....nxp.com,
        Yannick Vignon <yannick.vignon@....com>
Subject: Re: [RFC PATCH net-next v1 1/2] net: add name field to napi struct

On Thu, May 6, 2021 at 7:20 PM Yannick Vignon
<yannick.vignon@....nxp.com> wrote:
>
> From: Yannick Vignon <yannick.vignon@....com>
>
> An interesting possibility offered by the new thread NAPI code is to
> fine-tune the affinities and priorities of different NAPI instances. In a
> real-time networking context, this makes it possible to ensure packets
> received in a high-priority queue are always processed, and with low
> latency.
>
> However, the way the NAPI threads are named does not really expose which
> one is responsible for a given queue. Assigning a more explicit name to
> NAPI instances can make that determination much easier.
>
> Signed-off-by: Yannick Vignon <yannick.vignon@....com>
> -

Having to change drivers seems a lot of work

How about exposing thread id (and napi_id eventually) in
/sys/class/net/eth0/queues/*/kthread_pid  ?