Home » Mailing list archives » linux-kernel » 2008 » February » 21

Re: 100% C0 with 2.6.25-rc

Previous thread: Re: [gentoo-amd64] Re: BT8x8 by Chris Brennan on Thursday, February 21, 2008 - 12:33 pm. (1 message)

Next thread: [PATCH] ptrace: fix 2.6.25 ptrace_bts_config structure declaration by Dave Anderson on Thursday, February 21, 2008 - 12:45 pm. (2 messages)
[view original message]
From: Rafael J. Wysocki <rjw@...>
To: Jan Willies <jan@...>
Cc: <linux-acpi@...>, Ingo Molnar <mingo@...>, LKML <linux-kernel@...>, Thomas Gleixner <tglx@...>, Venki Pallipadi <venkatesh.pallipadi@...>
Subject: Re: 100% C0 with 2.6.25-rc
Date: Thursday, February 21, 2008 - 12:33 pm

Let's see what the experts say.


Thanks,

Rafael

--
[view original message]
From: Jan Willies <jan@...>
To: Rafael J. Wysocki <rjw@...>
Cc: <linux-acpi@...>, Ingo Molnar <mingo@...>, LKML <linux-kernel@...>, Thomas Gleixner <tglx@...>, Venki Pallipadi <venkatesh.pallipadi@...>
Subject: Re: 100% C0 with 2.6.25-rc
Date: Friday, February 22, 2008 - 11:56 am

After a lot of bisecting I've found the bad commit: 


9b12e18cdc1553de62d931e73443c806347cd974 is first bad commit

commit 9b12e18cdc1553de62d931e73443c806347cd974

Author: venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com>

Date:   Thu Jan 31 17:35:05 2008 -0800


    ACPI: cpuidle: Support C1 idle time accounting


    Show C1 idle time in /sysfs cpuidle interface. C1 idle time may not

    be entirely accurate in all cases. It includes the time spent

    in the interrupt handler after wakeup with "hlt" based C1. But, it will

    be accurate with "mwait" based C1.


Reverting the commit brings my laptop back to C2.


HTH


- Jan

--
[view original message]
From: Pallipadi, Venkatesh <venkatesh.pallipadi@...>
To: Jan Willies <jan@...>, Rafael J. Wysocki <rjw@...>
Cc: <linux-acpi@...>, Ingo Molnar <mingo@...>, LKML <linux-kernel@...>, Thomas Gleixner <tglx@...>
Subject: RE: 100% C0 with 2.6.25-rc
Date: Friday, February 22, 2008 - 1:33 pm

One question. Do you have CONFIG_CPU_IDLE enabled in your confg?


Thanks,

Venki

--
[view original message]
From: Jan Willies <jan@...>
To: Pallipadi, Venkatesh <venkatesh.pallipadi@...>
Cc: Rafael J. Wysocki <rjw@...>, <linux-acpi@...>, Ingo Molnar <mingo@...>, LKML <linux-kernel@...>, Thomas Gleixner <tglx@...>
Subject: Re: 100% C0 with 2.6.25-rc
Date: Friday, February 22, 2008 - 1:50 pm

Yes, I have. Attached is my .config file


- Jan
[view original message]
From: Pallipadi, Venkatesh <venkatesh.pallipadi@...>
To: Jan Willies <jan@...>
Cc: Rafael J. Wysocki <rjw@...>, <linux-acpi@...>, Ingo Molnar <mingo@...>, LKML <linux-kernel@...>, Thomas Gleixner <tglx@...>
Subject: RE: 100% C0 with 2.6.25-rc
Date: Friday, February 22, 2008 - 1:55 pm

Can you try with it disabled and check whether you still see the

problem?


Thanks,

Venki

--
[view original message]
From: Jan Willies <jan@...>
To: Pallipadi, Venkatesh <venkatesh.pallipadi@...>
Cc: Rafael J. Wysocki <rjw@...>, <linux-acpi@...>, Ingo Molnar <mingo@...>, LKML <linux-kernel@...>, Thomas Gleixner <tglx@...>
Subject: Re: 100% C0 with 2.6.25-rc
Date: Friday, February 22, 2008 - 2:16 pm

Yup you are right, that fixes the problem as well.


- Jan

--
[view original message]
From: Pallipadi, Venkatesh <venkatesh.pallipadi@...>
To: Jan Willies <jan@...>, Rafael J. Wysocki <rjw@...>
Cc: <linux-acpi@...>, Ingo Molnar <mingo@...>, LKML <linux-kernel@...>, Thomas Gleixner <tglx@...>
Subject: RE: 100% C0 with 2.6.25-rc
Date: Friday, February 22, 2008 - 1:03 pm

Thanks for the bisect info. I will look at the bad side effects that patch may be having and I should have a patch for you to test later today....


Thanks,

Venki

--
Previous thread: Re: [gentoo-amd64] Re: BT8x8 by Chris Brennan on Thursday, February 21, 2008 - 12:33 pm. (1 message)

Next thread: [PATCH] ptrace: fix 2.6.25 ptrace_bts_config structure declaration by Dave Anderson on Thursday, February 21, 2008 - 12:45 pm. (2 messages)