netdev - Re: [PATCH] [net-next] net: wwan: t7xx: Change PM_AUTOSUSPEND

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Message-ID: <d2f54fde-1d98-4925-866a-1d755956bbce@lunn.ch>
Date: Wed, 6 Nov 2024 19:04:25 +0100
From: Andrew Lunn <andrew@...n.ch>
To: wojackbb@...il.com
Cc: netdev@...r.kernel.org, chandrashekar.devegowda@...el.com,
	chiranjeevi.rapolu@...ux.intel.com, haijun.liu@...iatek.com,
	m.chetan.kumar@...ux.intel.com, ricardo.martinez@...ux.intel.com,
	loic.poulain@...aro.org, ryazanov.s.a@...il.com,
	johannes@...solutions.net, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com,
	linux-arm-kernel@...ts.infradead.org,
	angelogioacchino.delregno@...labora.com,
	linux-mediatek@...ts.infradead.org, matthias.bgg@...il.com
Subject: Re: [PATCH] [net-next] net: wwan: t7xx: Change PM_AUTOSUSPEND_MS to
 5000

On Wed, Nov 06, 2024 at 06:40:05PM +0800, wojackbb@...il.com wrote:
> From: Jack Wu <wojackbb@...il.com>
> 
> Because optimizing the power consumption of t7XX,
> change auto suspend time to 5000.
> 
> The Tests uses a script to loop through the power_state
> of t7XX.
> (for example: /sys/bus/pci/devices/0000\:72\:00.0/power_state)
> 
> * If Auto suspend is 20 seconds,
>   test script show power_state have 0~5% of the time was in D3 state
>   when host don't have data packet transmission.
> 
> * Changed auto suspend time to 5 seconds,
>   test script show power_state have 50%~80% of the time was in D3 state
>   when host don't have data packet transmission.

Please add the justification for changing this globally, that you
tested a number of different machines using the t7xx and they all
benefited from this.

    Andrew

---
pw-bot: cr