From: John <linux.kernel@free.fr>
To: John <linux.kernel@free.fr>
Cc: linux-kernel@vger.kernel.org, tglx@timesys.com, mingo@elte.hu,
johnstul@us.ibm.com, akpm@osdl.org, linux.kernel@free.fr
Subject: Re: 2.6.20.3-rt8 clock_nanosleep() sleeps 10 ms
Date: Tue, 27 Mar 2007 17:16:54 +0200 [thread overview]
Message-ID: <46093566.4040902@free.fr> (raw)
In-Reply-To: <460930BB.2050905@free.fr>
John wrote:
> It seems the CPU was not switched to high-resolution mode?
>
> # dmesg | grep resolution
> /* NOTHING */
>
> Do I need to enable ACPI?
ACPI seems mandatory for high-resolution mode?
I added...
CONFIG_ACPI=y
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
# dmesg | grep resolution
Switched to high resolution mode on CPU 0
Ingo, Thomas, do you have time to explain why ACPI is needed?
Regards.
prev parent reply other threads:[~2007-03-27 15:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-27 14:56 2.6.20.3-rt8 clock_nanosleep() sleeps 10 ms John
2007-03-27 15:16 ` John [this message]
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