netdev - Re: [PATCH RFC 0/3] tun zerocopy stats

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Message-ID: <3ef92f5f-b242-a66a-860f-31da29216dc4@redhat.com>
Date:   Wed, 11 Oct 2017 11:15:54 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        David Miller <davem@...emloft.net>
Cc:     Network Development <netdev@...r.kernel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH RFC 0/3] tun zerocopy stats



On 2017年10月11日 03:11, Willem de Bruijn wrote:
> On Tue, Oct 10, 2017 at 1:39 PM, David Miller <davem@...emloft.net> wrote:
>> From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
>> Date: Tue, 10 Oct 2017 11:29:33 -0400
>>
>>> If there is a way to expose these stats through vhost_net directly,
>>> instead of through tun, that may be better. But I did not see a
>>> suitable interface. Perhaps debugfs.
>> Please don't use debugfs, thank you :-)
> Okay. I'll take a look at tracing for on-demand measurement.

This reminds me a past series that adding tracepoints to vhost/net[1]. 
It can count zero/datacopy independently and even contains a sample 
program to show the stats.

Thanks

[1] https://lists.oasis-open.org/archives/virtio-dev/201403/msg00025.html