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Date:      Wed, 27 Oct 2010 10:56:26 +0300
From:      Alexander Motin <mav@FreeBSD.org>
To:        Takanori Watanabe <takawata@init-main.com>
Cc:        freebsd-acpi@FreeBSD.org
Subject:   Re: Event based scheduling and USB.
Message-ID:  <4CC7DB2A.2090601@FreeBSD.org>
In-Reply-To: <201010270737.o9R7b2aj093646@sana.init-main.com>
References:  <201010270737.o9R7b2aj093646@sana.init-main.com>

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Takanori Watanabe wrote:
> In message <4CC732C7.50409@FreeBSD.org>, Alexander Motin wrote:
>> Most likely you should be able to avoid interrupt sharing using some
>> additional HPET options, described at hpet(4).
> 
> Try to disable using shared IRQ with uhci, the IRQ used by HPET become cpu: 
> interrupt and certainly load average goes quite low, 

If you mean "cpuX:timer" - then probably you did something wrong and
system fallen back to LAPIC timer.

> but never transit to C3 state. Using legacy route, it works quite well.

C3 state is blocked when LAPIC timer used.

-- 
Alexander Motin



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