netdev - Re: [RFC PATCH v2 0/2] nb8800 suspend/resume support

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Date:   Wed, 02 Aug 2017 17:10:06 +0100
From:   Måns Rullgård <mans@...sr.com>
To:     Mason <slash.tmp@...e.fr>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH v2 0/2] nb8800 suspend/resume support

Mason <slash.tmp@...e.fr> writes:

> On 02/08/2017 17:56, Måns Rullgård wrote:
>
>> Mason writes:
>> 
>>> From my perspective, the older method does not work on newer chips :-)
>> 
>> It does work on tango4.
>
> Agreed.
>
>> What does the tango5 do if you flood it with packets faster than the
>> kernel can keep up with?  That would make it hit the end of the rx
>> chain, which is apparently what makes it miserable with the current dma
>> stop code.
>
> The simplest way to test this would be sending tiny packets
> as fast as possible, right? So ping -f on a GigE link should
> fit the bill?

ping -f is limited to 100 packets per second.  Use something like iperf
in UDP mode instead.

-- 
Måns Rullgård