linux下/proc/cpuinfo flags 解释

野性酷女 2022-09-28 01:28 304阅读 0赞

一、Windows平台：  
使用cpu-Z即可查看。

二、[Linux][]平台：  
在终端执行\#cat /proc/cpuinfo（或\#grep -E '(vmx|svm)' /proc/cpuinfo）命令，找到flags部分，如果其中输出有VMX或SVM，即表明支持虚拟化技术。

三、 Linux显示的flags部分解释：  
fpu – Onboard FPU  
vme – Virtual Mode Extensions  
de – Debugging Extensions  
pse – Page Size Extensions  
tsc – Time Stamp Counter  
msr – Model-Specific Registers  
pae – Physical Address Extensions  
mce – Machine Check Architecture  
cx8 – CMPXCHG8 instruction  
apic – Onboard APIC  
sep – SYSENTER/SYSEXIT  
mtrr – Memory Type Range Registers  
pge – Page Global Enable  
mca – Machine Check Architecture  
cmov – CMOV instructions (plus FCMOVcc, FCOMI with FPU)  
pat – Page Attribute Table  
pse36 – 36-bit PSEs  
pn – Processor serial number  
clflush – CLFLUSH instruction  
dts – Debug Store  
acpi – ACPI via MSR  
mmx – Multimedia Extensions  
fxsr – FXSAVE/FXRSTOR, CR4.OSFXSR  
sse – SSE  
sse2 – SSE2  
ss – CPU self snoop  
ht – Hyper-Threading  
tm – Automatic clock control  
ia64 – IA-64 processor  
pbe – Pending Break Enable

syscall – SYSCALL/SYSRET  
mp – MP Capable  
nx – Execute Disable  
mmxext – AMD MMX extensions  
fxsr\_opt – FXSAVE/FXRSTOR optimizations  
pdpe1gb – GB pages  
rdtscp – RDTSCP  
lm – Long Mode (x86-64)  
3dnowext – AMD 3DNow! extensions  
3dnow – 3DNow!  
k8 – Opteron, Athlon64  
k7 – Athlon  
constant\_tsc – TSC ticks at a constant rate  
up – smp kernel running on up  
pebs – Precise-Event Based Sampling  
bts – Branch Trace Store  
nonstop\_tsc – TSC does not stop in C states  
pni – SSE-3  
pclmulqdq – PCLMULQDQ instruction  
dtes64 – 64-bit Debug Store  
monitor – Monitor/Mwait support  
ds\_cpl – CPL Qual. Debug Store  
vmx – Hardware virtualization //intel的虚拟化技术VT技术  
smx – Safer mode  
est – Enhanced SpeedStep  
tm2 – Thermal Monitor 2  
ssse3 – Supplemental SSE-3  
cid – Context ID  
fma – Fused multiply-add  
cx16 – CMPXCHG16B  
xptr – Send Task Priority Messages  
pdcm – Performance Capabilities  
dca – Direct Cache Access  
sse4\_1 – SSE-4.1  
sse4\_2 – SSE-4.2  
x2apic – x2APIC  
aes – AES instructions  
xsave – XSAVE/XRSTOR/XSETBV/XGETBV  
avx – Advanced Vector Extensions  
hypervisor – Running on a hypervisor  
lahf\_lm – LAHF/SAHF in long mode  
cmp\_legacy – If yes HyperThreading not valid  
svm – Secure virtual machine //AMD的虚拟化技术AMD-V  
extapic – Extended APIC space  
cr8legacy – CR8 in 32-bit mode  
abm – Advanced bit manipulation  
sse4a – SSE-4A  
ibs – Instruction Based Sampling  
sse5 – SSE-5  
skinit – SKINIT/STGI instructions  
wdt – Watchdog timer

[Linux]: http://lib.csdn.net/base/linux