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linux /proc/cpuinfo 文件描寫敘述

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processor :系統中邏輯處理核的編號。對於單核處理器。則課覺得是其CPU編號,對於多核處理器則能夠是物理核、或者使用超線程技術虛擬的邏輯核
vendor_id :CPU制造商
cpu family :CPU產品系列代號
model   :CPU屬於其系列中的哪一代的代號
model name:CPU屬於的名字及其編號、標稱主頻
stepping  :CPU屬於制作更新版本號
cpu MHz  :CPU的實際使用主頻
cache size :CPU二級緩存大小
physical id :單個CPU的標號
siblings :單個CPU邏輯物理核數
core id :當前物理核在其所處CPU中的編號,這個編號不一定連續
cpu cores :該邏輯核所處CPU的物理核數
apicid :用來區分不同邏輯核的編號。系統中每一個邏輯核的此編號必定不同。此編號不一定連續
fpu :是否具有浮點運算單元(Floating Point Unit)
fpu_exception :是否支持浮點計算異常
cpuid level :運行cpuid指令前。eax寄存器中的值,依據不同的值cpuid指令會返回不同的內容
wp :表明當前CPU是否在內核態支持對用戶空間的寫保護(Write Protection)
flags :當前CPU支持的功能
bogomips :在系統內核啟動時粗略測算的CPU速度(Million Instructions Per Second)
clflush size :每次刷新緩存的大小單位
cache_alignment :緩存地址對齊單位
address sizes :可訪問地址空間位數
power management :對能源管理的支持,有下面幾個可選支持功能:

  ts:  temperature sensor

  fid:  frequency id control

  vid:  voltage id control

  ttp:  thermal trip

  tm:

  stc:

  100mhzsteps:

  hwpstate:

CPU信息中flags各項含義:

fpu: Onboard (x87) Floating Point Unit
vme: Virtual Mode Extension
de: Debugging Extensions
pse: Page Size Extensions
tsc: Time Stamp Counter: support for RDTSC and WRTSC instructions
msr: Model-Specific Registers
pae: Physical Address Extensions: ability to access 64GB of memory; only 4GB can be accessed at a time though
mce: Machine Check Architecture
cx8: CMPXCHG8 instruction
apic: Onboard Advanced Programmable Interrupt Controller
sep: Sysenter/Sysexit Instructions; SYSENTER is used for jumps to kernel memory during system calls, and SYSEXIT is used for jumps: back to the user code
mtrr: Memory Type Range Registers
pge: Page Global Enable
mca: Machine Check Architecture
cmov: CMOV instruction
pat: Page Attribute Table
pse36: 36-bit Page Size Extensions: allows to map 4 MB pages into the first 64GB RAM, used with PSE.
pn: Processor Serial-Number; only available on Pentium 3
clflush: CLFLUSH instruction
dtes: Debug Trace Store
acpi: ACPI via MSR
mmx: MultiMedia Extension
fxsr: FXSAVE and FXSTOR instructions
sse: Streaming SIMD Extensions. Single instruction multiple data. Lets you do a bunch of the same operation on different pieces of input: in a single clock tick.
sse2: Streaming SIMD Extensions-2. More of the same.
selfsnoop: CPU self snoop
acc: Automatic Clock Control
IA64: IA-64 processor Itanium.
ht: HyperThreading. Introduces an imaginary second processor that doesn’t do much but lets you run threads in the same process a bit quicker.
nx: No Execute bit. Prevents arbitrary code running via buffer overflows.
pni: Prescott New Instructions aka. SSE3
vmx: Intel Vanderpool hardware virtualization technology
svm: AMD “Pacifica” hardware virtualization technology
lm: “Long Mode,” which means the chip supports the AMD64 instruction set
tm: “Thermal Monitor” Thermal throttling with IDLE instructions. Usually hardware controlled in response to CPU temperature.
tm2: “Thermal Monitor 2″ Decrease speed by reducing multipler and vcore.
est: “Enhanced SpeedStep”

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linux /proc/cpuinfo 文件描寫敘述