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xen-devel
RE: [Xen-devel] How to use deeper C state
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To: |
"Wei, Gang" <gang.wei@xxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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Subject: |
RE: [Xen-devel] How to use deeper C state |
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From: |
Akio Takebe <takebe_akio@xxxxxxxxxxxxxx> |
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Date: |
Wed, 21 Jan 2009 19:14:45 +0900 |
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Cc: |
"Tian, Kevin" <kevin.tian@xxxxxxxxx>, Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>, "Yu, Ke" <ke.yu@xxxxxxxxx> |
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Wed, 21 Jan 2009 02:15:13 -0800 |
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<58C97BA70EB797takebe_akio@xxxxxxxxxxxxxx> <8FED46E8A9CA574792FC7AACAC38FE7701C96A8403@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> <59C97BAB8F4DA7takebe_akio@xxxxxxxxxxxxxx> <8FED46E8A9CA574792FC7AACAC38FE7701C96A8437@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
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Sender: |
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
Hi,
>On Wednesday, January 21, 2009 5:35 PM, Akio Takebe wrote:
>> Hi,
>>
>>> The max_cstate just means if there are c-state deep to C7, those deep C
>>> states can be entered. But from below debug out, I found the deepest C
>>> state
>>> supported is C1 in you machine because all supported C states will be
>>> printed out.
>>>
>>> You machine may not support deep C states, or dom0 failed to detected it
>>> from
>>> BIOS. Can you provide the whole 'xm dmesg' result right after booting up?
>>>
>> Thank you for your reply.
>> The xm dmesg is below.
>>...
>>
>> (XEN) cpu1 cx acpi info:
>> (XEN) count = 1
>> (XEN) flags: bm_cntl[0], bm_chk[0], has_cst[0],
>> (XEN) pwr_setup_done[1], bm_rld_set[0]
>> (XEN) states[0]:
>> (XEN) reg.space_id = 0x0
>> (XEN) reg.bit_width = 0x0
>> (XEN) reg.bit_offset = 0x0
>> (XEN) reg.access_size = 0x0
>> (XEN) reg.address = 0x0
>> (XEN) type = 1
>> (XEN) latency = 0
>> (XEN) power = 0
>> (XEN) dp(@0x0000000000000000)
>
>Yes, dom0 only detected and passed one C state to HV. Can you give the
>machine model? Meanwhile please have some checks on CMOS options for whether
>there are some C-state or ACPI related options which are not enabled.
>
Thank you very much. I'll check some BIOS menu.
Best Regards,
Akio Takebe
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