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Date: Tue, 14 Nov 2023 10:22:43 -0500
From: Vadim Fedorenko <>
To: Saeed Mahameed <>, "David S. Miller"
 <>, Jakub Kicinski <>,
 Paolo Abeni <>, Eric Dumazet <>
Cc: Saeed Mahameed <>,,
 Tariq Toukan <>, Rahul Rameshbabu <>
Subject: Re: [net-next 08/14] net/mlx5e: Introduce lost_cqe statistic counter
 for PTP Tx port timestamping CQ

On 13/11/2023 15:00, Saeed Mahameed wrote:
> From: Rahul Rameshbabu <>
> Track the number of times the a CQE was expected to not be delivered on PTP
> Tx port timestamping CQ. A CQE is expected to not be delivered of a certain
> amount of time passes since the corresponding CQE containing the DMA
> timestamp information has arrived. Increment the late_cqe counter when such
> a CQE does manage to be delivered to the CQ.

It looks like missed/late timestamps is common problem for NICs. What do
you think about creating common counters in ethtool to have general
interface to provide timestamps counters? It may simplify things a lot.

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