linux-kernel - Re: high power consumption in recent kernels

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Date:	Thu, 30 Sep 2010 08:50:41 +0800
From:	"Alex,Shi" <alex.shi@...el.com>
To:	Norbert Preining <preining@...ic.at>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	"Chen, Tim C" <tim.c.chen@...el.com>,
	"arjan@...radead.org" <arjan@...radead.org>,
	"efault@....de" <efault@....de>,
	"Li, Shaohua" <shaohua.li@...el.com>, tglx <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Zhao, Yakui" <yakui.zhao@...el.com>
Subject: Re: high power consumption in recent kernels

On Wed, 2010-09-29 at 22:39 +0800, Norbert Preining wrote:
> Hi Alex,
> 
> > Could you like to try the following patch on your system and see how
> > many power it consumption now?
> 
> But this patch is excately what you send me already and what I tried
> and I answered in the last email?
> 
> Do I miss something here?
> 
> All the best
> 
> Norbert
The following line is different, the new code remove the nohz_ratelimit
from irq_exit(). That may resolve your system too many interrupts
issue. 

+               arch_needs_cpu(cpu)|| (inidle && nohz_ratelimit(cpu))) {


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