netdev - Re: [net-next,v2] [PATCH net-next v2] net: wwan: t7xx: Change PM_AUTOSUSPEND

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Message-ID: <546f1456-87f2-4e54-a486-86cac1504a3d@lunn.ch>
Date: Thu, 14 Nov 2024 16:33:16 +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: [net-next,v2] [PATCH net-next v2] net: wwan: t7xx: Change
 PM_AUTOSUSPEND_MS to 5000

On Thu, Nov 14, 2024 at 06:20:02PM +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.
> 
> We tested Fibocom FM350 and our products using the t7xx and they all
> benefited from this.
> 
> Signed-off-by: Jack Wu <wojackbb@...il.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew