linux-kernel - Re: [RFCv4 PATCH 00/34] sched: Energy cost model for energy-aware scheduling

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Message-ID: <55911BB7.3000804@arm.com>
Date:	Mon, 29 Jun 2015 11:19:35 +0100
From:	Dietmar Eggemann <dietmar.eggemann@....com>
To:	"pang.xunlei@....com.cn" <pang.xunlei@....com.cn>,
	Abel Vesa <abelvesa@...ux.com>
CC:	Juri Lelli <Juri.Lelli@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"mingo@...hat.com" <mingo@...hat.com>,
	Morten Rasmussen <Morten.Rasmussen@....com>,
	"mturquette@...aro.org" <mturquette@...aro.org>,
	Peter Boonstoppel <pboonstoppel@...dia.com>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"preeti@...ux.vnet.ibm.com" <preeti@...ux.vnet.ibm.com>,
	"rjw@...ysocki.net" <rjw@...ysocki.net>,
	Sai Gurrappadi <sgurrappadi@...dia.com>,
	"vincent.guittot@...aro.org" <vincent.guittot@...aro.org>,
	"yuyang.du@...el.com" <yuyang.du@...el.com>
Subject: Re: [RFCv4 PATCH 00/34] sched: Energy cost model for energy-aware
 scheduling

On 29/06/15 10:06, pang.xunlei@....com.cn wrote:
> Hi Abel,
> 
> Abel Vesa <abelvesa@...ux.com> wrote 2015-06-29 AM 04:26:31:
>>
>> Re: [RFCv4 PATCH 00/34] sched: Energy cost model for energy-aware 
> scheduling

[...]

>> I wasn't able to determine the cause from the line:
>>
>> 7de5:       49 0f a3 87 00 03 00    bt     %rax,0x300(%r15)
>>
>> Finally, the question I have is: Could this happen because I'm running
>> it from qemu?
>>
>> I hope all this info helps.
> 
> I've met this as well.
> 
> You can try to change "return -1;" in energy_aware_wake_cpu() to "return 
> target_cpu;"
> hope this may help.

Yeah, I also suppose that https://lkml.org/lkml/2015/5/14/330 cures it.

-- Dietmar

[...]

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