linux-kernel - Re: [PATCH net-next 0/3] Support exposing raw cycle counters in PTP and mlx5

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Message-ID: <20250801132342.6ad4303b@kernel.org>
Date: Fri, 1 Aug 2025 13:23:42 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Carolina Jubran <cjubran@...dia.com>
Cc: Tariq Toukan <tariqt@...dia.com>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew+netdev@...n.ch>,
 "David S. Miller" <davem@...emloft.net>, Saeed Mahameed
 <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>, Mark Bloch
 <mbloch@...dia.com>, Richard Cochran <richardcochran@...il.com>,
 netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 0/3] Support exposing raw cycle counters in PTP
 and mlx5

On Thu, 31 Jul 2025 22:03:02 +0300 Carolina Jubran wrote:
> Additionally, I wanted to mention another relevant use case that wasn’t 
> brought up earlier: fwctl can expose event records tagged with raw cycle 
> counter timestamps. When the device is in free-running mode, correlating 
> those with host time becomes difficult unless user space has access to 
> both cycle and system time snapshots.

Okay, so DPDK and DOCA, got it.