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Date:      Fri, 25 Jun 2004 12:30:31 -0600
From:      Scott Long <scottl@freebsd.org>
To:        Gerrit Nagelhout <gnagelhout@sandvine.com>
Cc:        Julian Elischer <julian@elischer.org>
Subject:   Re: STI, HLT in acpi_cpu_idle_c1
Message-ID:  <40DC6F47.1020506@freebsd.org>
In-Reply-To: <FE045D4D9F7AED4CBFF1B3B813C85337054EC4D1@mail.sandvine.com>

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Gerrit Nagelhout wrote:

> Scott Long wrote:
> 
>>This likely means that you're no longer getting any interrupts at all.
>>Btw, is the aac driver running it MPSAFE or FAST mode?  I'm 
>>not sure if
>>changing it to MPSAFE mode will make a difference, and it 
>>certainly will
>>change the timings in our system.
>>
>>Scott
>>
> 
> 
> Looks like it's running in FAST mode.  What will change by running it in
> MPSAFE mode?

In FAST mode, the interrupt handler is directly dispatched when the
interrupt comes in.  In MPSAFE mode, it runs in an ithread.

Scott



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