netdev - Re: thunderx sgmii interface hang

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Message-ID: <20171213194347.GA932@lunn.ch>
Date:   Wed, 13 Dec 2017 20:43:47 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Tim Harvey <tharvey@...eworks.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Sunil Goutham <sgoutham@...ium.com>
Subject: Re: thunderx sgmii interface hang

> The nic appears to work fine (pings, TCP etc) up until a performance
> test is attempted.
> When an iperf bandwidth test is attempted the nic ends up in a state
> where truncated-ip packets are being sent out (per a tcpdump from
> another board):

Hi Tim

Are pause frames supported? Have you tried turning them off?

Can you reproduce the issue with UDP? Or is it TCP only?

    Andrew