linux-kernel - RE: [PATCH] net :mana : Add per-cpu stats for MANA device

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Date: Thu, 7 Mar 2024 15:49:15 +0000
From: Haiyang Zhang <haiyangz@...rosoft.com>
To: Jakub Kicinski <kuba@...nel.org>, Shradha Gupta
	<shradhagupta@...ux.microsoft.com>, Shradha Gupta
	<shradhagupta@...rosoft.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>, Eric Dumazet
	<edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Ajay Sharma
	<sharmaajay@...rosoft.com>, Leon Romanovsky <leon@...nel.org>, Thomas
 Gleixner <tglx@...utronix.de>, Sebastian Andrzej Siewior
	<bigeasy@...utronix.de>, KY Srinivasan <kys@...rosoft.com>, Wei Liu
	<wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>, Long Li
	<longli@...rosoft.com>, Michael Kelley <mikelley@...rosoft.com>
Subject: RE: [PATCH] net :mana : Add per-cpu stats for MANA device



> -----Original Message-----
> From: Jakub Kicinski <kuba@...nel.org>
> Sent: Thursday, March 7, 2024 10:29 AM
> To: Shradha Gupta <shradhagupta@...ux.microsoft.com>
> Cc: linux-kernel@...r.kernel.org; linux-hyperv@...r.kernel.org; linux-
> rdma@...r.kernel.org; netdev@...r.kernel.org; Eric Dumazet
> <edumazet@...gle.com>; Paolo Abeni <pabeni@...hat.com>; Ajay Sharma
> <sharmaajay@...rosoft.com>; Leon Romanovsky <leon@...nel.org>; Thomas
> Gleixner <tglx@...utronix.de>; Sebastian Andrzej Siewior
> <bigeasy@...utronix.de>; KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; Wei Liu <wei.liu@...nel.org>; Dexuan Cui
> <decui@...rosoft.com>; Long Li <longli@...rosoft.com>; Michael Kelley
> <mikelley@...rosoft.com>; Shradha Gupta <shradhagupta@...rosoft.com>
> Subject: Re: [PATCH] net :mana : Add per-cpu stats for MANA device
> 
> On Thu,  7 Mar 2024 06:52:12 -0800 Shradha Gupta wrote:
> > Extend 'ethtool -S' output for mana devices to include per-CPU packet
> > stats
> 
> But why? You already have per queue stats.
Yes. But the q to cpu binding is dynamic, we also want the per-CPU stat 
to analyze the CPU usage by counting the packets and bytes on each CPU.

> 
> > Built-on: Ubuntu22
> > Tested-on: Ubuntu22
> 
> I understand when people mention testing driver changes on particular
> SKUs of supported devices, that adds meaningful info. I don't understand
> what "built" and "tested" on a distro is supposed to tell us.
> Honest question, what is the value of this?
@Shradha Gupta Please add the tested SKU and test case here. Or, you don't
have to include test info with the patch.

Thanks,
- Haiyang