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Core2Duo: Move to\from C4 state

idata
Employee
2,040 Views

Hello,

I'm working with Core2Duo under vxWorks 6.8

In order to put the CPU into C4 I ran the following code:

mov EAX, 0x30 (Bits 0-3 define C4 sub states)

mov ECX, 0x0

mwait

1. Where can I find full documentation on C1,C2,C3 sub states ?

I read the manual of Core2Duo but found only information on C1-C4 states. not sub states.

2. Does the High Performance Event Timer (HPET) keep ticking under C4 ?

3. Can I use ICE (e.g ARIUM) to find what is current state of the CPU ?

Thanks,

Zvika.

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3 Replies
RGiff
Honored Contributor I
276 Views

Try the Intel Live Chat line.

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idata
Employee
276 Views

Hello,

How can I start a chat ?

I did not find it in the Intel Communities.

Please write the exact link.

Thanks,

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RGiff
Honored Contributor I
276 Views

Go to Contact support and look for live chat it's not hard to find.

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