netdev - Re: Tools for sampling ethtool --statistics

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Message-ID: <CALYk33gHWBcQ7T_4FKxwG2x56pMK6YU+qcyTogx4pMVqGsvcmA@mail.gmail.com>
Date:	Sun, 21 Feb 2016 11:40:57 +0200
From:	Rana Shahout <rana.shahot@...il.com>
To:	brouer@...hat.com, netdev@...r.kernel.org, ogerlitz@...lanox.com
Subject: Re: Tools for sampling ethtool --statistics

> Hi All,
>
> I wrote a small tool[1] to extract ethtool --statistics|-S, sample and
> present it in a more human readable manor.  You might also find this
> useful...
>
> https://github.com/netoptimizer/network-testing/blob/master/bin/ethtool_stats.pl
>
> The reason I wrote this script is that the mlx5 driver (Mellanox 100 Gbit/s)
> does not report correct ifconfig stats.  It reports the HW counters,
> not what the network stack is able to handle.  I/we obviously need the
> stack number when working on improving the stack.

mlx5 drive does not report correct counters also in ethtool statistics
(ethtool -S).
ethtool statistics reports also the HW counters, so all counters
except counters per channel are wrong.
We are working on fix. It will be available soon.

>
> --
> Best regards,
>   Jesper Dangaard Brouer
>   MSc.CS, Principal Kernel Engineer at Red Hat
>   Author of http://www.iptv-analyzer.org
>   LinkedIn: http://www.linkedin.com/in/brouer
>