netdev - Re: [PATCH v1 net-next 1/2] net-device: reorganize net

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Message-ID: <074c0c5c-3336-416e-aad4-dc1b4a442edd@kernel.org>
Date: Tue, 5 Dec 2023 09:05:49 -0700
From: David Ahern <dsahern@...nel.org>
To: Coco Li <lixiaoyan@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Eric Dumazet <edumazet@...gle.com>, Neal Cardwell <ncardwell@...gle.com>,
 Mubashir Adnan Qureshi <mubashirq@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
 Jonathan Corbet <corbet@....net>, Daniel Borkmann <daniel@...earbox.net>
Cc: netdev@...r.kernel.org, Chao Wu <wwchao@...gle.com>,
 Wei Wang <weiwan@...gle.com>, Pradeep Nemavat <pnemavat@...gle.com>
Subject: Re: [PATCH v1 net-next 1/2] net-device: reorganize net_device fast
 path variables

On 12/4/23 1:12 PM, Coco Li wrote:
> Reorganize fast path variables on tx-txrx-rx order
> Fastpath variables end after npinfo.
> 
> Below data generated with pahole on x86 architecture.
> 
> Fast path variables span cache lines before change: 12
> Fast path variables span cache lines after change: 4
> 
> Suggested-by: Eric Dumazet <edumazet@...gle.com>
> Signed-off-by: Coco Li <lixiaoyan@...gle.com>
> ---
>  include/linux/netdevice.h | 117 +++++++++++++++++++++-----------------
>  net/core/dev.c            |  56 ++++++++++++++++++
>  2 files changed, 120 insertions(+), 53 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>