From: Richard Cochran <richardcochran@gmail.com>
To: Harini Katakam <harinik@xilinx.com>
Cc: Harini Katakam <harini.katakam@xilinx.com>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
David Miller <davem@davemloft.net>,
Claudiu Beznea <claudiu.beznea@microchip.com>,
Andrei Pistirica <andrei.pistirica@microchip.com>,
kuba@kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Michal Simek <michal.simek@xilinx.com>
Subject: Re: [RFC PATCH] net: macb: Process tx timestamp only on ptp packets
Date: Tue, 24 Aug 2021 19:08:14 -0700 [thread overview]
Message-ID: <20210825020814.GB25797@hoboy.vegasvil.org> (raw)
In-Reply-To: <CAFcVECKXOVwpsR=bEUmTXZpSQTjez1fjf1X9bXV_sFCe_U3_qA@mail.gmail.com>
On Tue, Aug 24, 2021 at 08:59:20PM +0530, Harini Katakam wrote:
> Yes, there is no SW overhead because the skb check ensures timestamp
> post processing is done only on requested packets. But the IP
> timestamps all packets
> because this is a register level setting, not per packet. That's the
> overhead I was referring to.
But the IP block time stamps the frames in silicon, no?
I don't see how that is "overhead" in any sense of the word.
Thanks,
Richard
prev parent reply other threads:[~2021-08-25 2:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-24 10:12 [RFC PATCH] net: macb: Process tx timestamp only on ptp packets Harini Katakam
2021-08-24 14:05 ` Richard Cochran
2021-08-24 15:29 ` Harini Katakam
2021-08-25 2:08 ` Richard Cochran [this message]
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