Ubuntu 13.04使用i5-3210M, hyper-threading只開一半? [論壇 - Ubuntu硬體支援]


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Ubuntu 13.04使用i5-3210M, hyper-threading只開一半?
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2009/11/9 22:43
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各位前輩大家好, 小弟使用Lenovo E330安裝Ubuntu 13.04.
在BIOS有開啟hyper-threading.
但是很奇怪的, 在Ubuntu裡只看到3個CPU
根據資料, 應該要有2*2 = 4個CPU才對
http://ark.intel.com/zh-tw/products/65708/Intel-Core-i5-3210M-Processor-3M-Cache-up-to-3_10-GHz-BGA

有沒有前輩遇過類似的狀況, 還是知道這是什麼原因呢?

lscpu結果如下:
Architecture: x86_64
CPU 作業模式: 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 3
On-line CPU(s) list: 0-2
每核心執行緒數:1
每通訊端核心數:2
Socket(s): 1
NUMA 節點: 1
供應商識別號: GenuineIntel
CPU 家族: 6
型號: 58
製程: 9
CPU MHz: 2501.000
BogoMIPS: 4988.30
虛擬: VT-x
L1d 快取: 32K
L1i 快取: 32K
L2 快取: 256K
L3 快取: 3072K
NUMA node0 CPU(s): 0-2

BIOS 資訊 (dmidecode)
Vendor: LENOVO
Version: H3ET32WW(1.15)
Release Date: 08/28/2012
Address: 0xE0000
Runtime Size: 128 kB
ROM Size: 12288 kB
Characteristics:
PCI is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
Boot from CD is supported
Selectable boot is supported
EDD is supported
3.5"/720 kB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
CGA/mono video services are supported (int 10h)
ACPI is supported
USB legacy is supported
BIOS boot specification is supported
Targeted content distribution is supported
UEFI is supported
BIOS Revision: 1.15

另外在dmidecode裡看到的數量是正常的:
Version: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
Voltage: 0.9 V
External Clock: 100 MHz
Max Speed: 2500 MHz
Current Speed: 2500 MHz
Status: Populated, Enabled
Upgrade: Socket rPGA988B
L1 Cache Handle: 0x0003
L2 Cache Handle: 0x0004
L3 Cache Handle: 0x0005
Serial Number: To Be Filled By O.E.M.
Asset Tag: To Be Filled By O.E.M.
Part Number: To Be Filled By O.E.M.
Core Count: 2
Core Enabled: 2
Thread Count: 4
Characteristics:
64-bit capable

想不出原因, 麻煩各位前輩幫忙
有需要什麼訊息請跟我說, 感恩

2013/9/26 21:54
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