netdev - Re: [PATCH net-next 7/8] net/mlx5e: XDP TX forwarding support

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Message-ID: <20160920165851.GC3291@pox.localdomain>
Date:   Tue, 20 Sep 2016 18:58:51 +0200
From:   Thomas Graf <tgraf@...g.ch>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Jesper Dangaard Brouer <brouer@...hat.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Tom Herbert <tom@...bertland.com>,
        Tariq Toukan <ttoukan.linux@...il.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Eran Ben Elisha <eranbe@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Rana Shahout <ranas@...lanox.com>
Subject: Re: [PATCH net-next 7/8] net/mlx5e: XDP TX forwarding support

On 09/20/16 at 09:45am, Alexei Starovoitov wrote:
> that's a great idea. Instead of adding aborted, ring_full, blahblah counters
> everywhere that cost performance, let's add tracepoints that are nops
> when not in use.
> And if all drivers call the same tracepoints it will be even better.
> Monitoring trace_xdp_aborted tracepoint would be generic way to debug
> 'divide by zero'.

Not opposed but I still need an indication to start tracing ;-) A
single counter would be enough though.