netdev - Re: [PATCH net-next v3 5/8] gve: Add support to query the nic clock

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Message-ID: <018d7f83-c071-425d-8fc0-bb03957b0ddc@linux.dev>
Date: Sat, 24 May 2025 22:58:30 +0100
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Harshitha Ramamurthy <hramamurthy@...gle.com>, netdev@...r.kernel.org
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, jeroendb@...gle.com, andrew+netdev@...n.ch,
 willemb@...gle.com, ziweixiao@...gle.com, pkaligineedi@...gle.com,
 yyd@...gle.com, joshwash@...gle.com, shailend@...gle.com, linux@...blig.org,
 thostet@...gle.com, jfraker@...gle.com, richardcochran@...il.com,
 jdamato@...tly.com, horms@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v3 5/8] gve: Add support to query the nic clock

On 23/05/2025 00:57, Harshitha Ramamurthy wrote:
> From: Kevin Yang <yyd@...gle.com>
> 
> Query the nic clock and store the results. The timestamp delivered
> in descriptors has a wraparound time of ~4 seconds so 250ms is chosen
> as the sync cadence to provide a balance between performance, and
> drift potential when we do start associating host time and nic time.
> 
> Leverage PTP's aux_work to query the nic clock periodically.
> 
> Signed-off-by: Kevin Yang <yyd@...gle.com>
> Signed-off-by: John Fraker <jfraker@...gle.com>
> Signed-off-by: Tim Hostetler <thostet@...gle.com>
> Signed-off-by: Ziwei Xiao <ziweixiao@...gle.com>
> Reviewed-by: Willem de Bruijn <willemb@...gle.com>
> Signed-off-by: Harshitha Ramamurthy <hramamurthy@...gle.com>

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>