netdev - Re: [PATCH net-next v6 2/3] net: phy: broadcom: Add PTP support for some Broadcom PHYs.

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Message-ID: <20220609040141.GA21971@hoboy.vegasvil.org>
Date:   Wed, 8 Jun 2022 21:01:41 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Jonathan Lemon <jonathan.lemon@...il.com>
Cc:     netdev@...r.kernel.org, kernel-team@...com,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Lasse Johnsen <l@...johnsen.me>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [PATCH net-next v6 2/3] net: phy: broadcom: Add PTP support for
 some Broadcom PHYs.

On Wed, Jun 08, 2022 at 02:29:15PM -0700, Jonathan Lemon wrote:
> Do you have a stress test to verify one way or the other?

You can set a large freq. offset on the server.  For example

   phc_ctl eth0 -- freq 500000

for 500 ppm and see what the client does.

Thanks,
Richard