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Date:   Fri, 2 Oct 2020 22:20:15 -0700
From:   Yonghong Song <>
To:     Ciara Loftus <>, <>,
Subject: Re: [PATCH bpf-next 2/3] samples: bpf: count syscalls in xdpsock

On 10/2/20 6:36 AM, Ciara Loftus wrote:
> Categorise and record syscalls issued in the xdpsock sample app. The
> categories recorded are:
>    rx_empty_polls:    polls when the rx ring is empty
>    fill_fail_polls:   polls when failed to get addr from fill ring
>    copy_tx_sendtos:   sendtos issued for tx when copy mode enabled
>    tx_wakeup_sendtos: sendtos issued when tx ring needs waking up
>    opt_polls:         polls issued since the '-p' flag is set
> Print the stats using '-a' on the xdpsock command line.
> Signed-off-by: Ciara Loftus <>

I am not a xdp expert and cannot really judge whether such additional
stats will be useful or not. Beyond that the patch looks good to me.

Acked-by: Yonghong Song <>

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