linux /proc/cpuinfo 文件描述

processor :系统中逻辑处理核的编号。对于单核处理器,则课认为是其CPU编号,对于多核处理器则可以是物理核、或者使用超线程技术虚拟的逻辑核 vendor_id :CPU制造商 cpu family :CPU产品系列代号 model   :CPU属于其系列中的哪一代的代号 model name:CPU属于的名字及其编号、标称主频 stepping  :CPU属于制作更新版本 cpu MHz  :CPU的实际使用主频 cache size :CPU二级缓存大小 physical id :单个CPU的标号 siblings:单个CPU逻辑物理核数 core id:当前物理核在其所处CPU中的编号,这个编号不一定连续 cpu cores :该逻辑核所处CPU的物理核数 apicid:用来区分不同逻辑核的编号,,系统中每个逻辑核的此编号必然不同,此编号不一定连续 fpu:是否具有浮点运算单元(Floating Point Unit) fpu_exception :是否支持浮点计算异常 cpuid level :执行cpuid指令前,eax寄存器中的值,根据不同的值cpuid指令会返回不同的内容 wp:表明当前CPU是否在内核态支持对用户空间的写保护(Write Protection) flags:当前CPU支持的功能 bogomips :在系统内核启动时粗略测算的CPU速度(Million Instructions Per Second) clflush size :每次刷新缓存的大小单位 cache_alignment :缓存地址对齐单位 address sizes:可访问地址空间位数 power management :对能源管理的支持,有以下几个可选支持功能:

  ts:  temperature sensor

  fid:  frequency id control

  vid:  voltage id control

  ttp:  thermal trip

  tm:

  stc:

  100mhzsteps:

  hwpstate:

CPU信息中flags各项含义:

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”

这几年大多是昆明空运来的,

linux /proc/cpuinfo 文件描述

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