RE: Can Interl 2.4G(C) Hyper threading processor run 2 hardware interrupts in the same moment?

NTDEV
1

AFAIK each logical processor has its own local apic. There’s a nice article
out there with some detail, go to http://developer.intel.com and search for
“hyperthreading interrupts”. The article is called “Methods to use Intel’s
HyperThreading Technology with Linux”, by Thomas Buerger. It’s a Linux
paper, but it has useful information anyway.

Alberto.

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.
com]On Behalf Of Maxim S. Shatskih
Sent: Thursday, February 19, 2004 8:08 AM
To: Windows System Software Devs Interest List
Subject: Re: [ntdev] Can Interl 2.4G(C) Hyper threading processor run 2
hardware interrupts in the same moment?

Yes it can.

Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

----- Original Message -----
From: “Crasher Guo”
To: “Windows System Software Devs Interest List”
Sent: Thursday, February 19, 2004 9:06 AM
Subject: [ntdev] Can Interl 2.4G(C) Hyper threading processor run 2 hardware
interrupts in the same moment?

> Hi,all
>
> Can One Interl 2.4G(C) Hyper threading processor run 2 hardware
interrupts
in the same moment?
> I’m working under Windows XP.
>
> Thanks for your time.
> Thanks for your help.
>
> Crasher Guo
> xxxxx@sinfors.com.cn
>
>
>
> —
> Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com

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Questions? First check the Kernel Driver FAQ at
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2

Actually, does anyone know where in the Intel books I can find a decent
pipeline-level explanation of how the APICs are integrated in a
hyperthreaded machine ? Anyone out there from Intel reading this list ?

Alberto.

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Jake Oshins
Sent: Thursday, February 19, 2004 11:30 PM
To: Windows System Software Devs Interest List
Subject: Re:[ntdev] Can Interl 2.4G(C) Hyper threading processor run 2
hardware interrupts in the same moment?

No, actually that part of the APIC state is separate. You can run two
interrupts at the same IRQL simultaneously.

–
Jake Oshins
Windows Base Kernel Team

This posting is provided “AS IS” with no warranties, and confers no rights.

“Loren Wilton” wrote in message news:xxxxx@ntdev…
>I believe so, yes. They would have to be at different IRQLs I think. I
> seem to remember that the host APIC is at least partially shared on an HT
> machine. So the amount of overlap you can have may depend on how the APIC
> is managed, which is different for edge and level interrupts.
>
> Loren
>
> ----- Original Message -----
> From: “Crasher Guo”
> To: “Windows System Software Devs Interest List”
> Sent: Wednesday, February 18, 2004 10:06 PM
> Subject: [ntdev] Can Interl 2.4G(C) Hyper threading processor run 2
> hardware
> interrupts in the same moment?
>
>
>> Hi,all
>>
>> Can One Interl 2.4G(C) Hyper threading processor run 2 hardware
> interrupts in the same moment?
>> I’m working under Windows XP.
>
>

—
Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256

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