Request about description regarding cpuinfo [closed]

Question

Hi we all know that cat /proc/cpuinfo will provide us , but my request is i want to know the description about all the fields over there . I am giving you my PC information here. I think its not off topic and this is a helpful post.

raja@badfox:~$ cat /proc/cpuinfo
processor   : 0
vendor_id   : GenuineIntel
cpu family  : 15
model       : 6
model name  : Intel(R) Pentium(R) D CPU 3.00GHz
stepping    : 5
cpu MHz     : 2400.000
cache size  : 2048 KB
physical id : 0
siblings    : 2
core id     : 0
cpu cores   : 2
apicid      : 0
initial apicid  : 0
fdiv_bug    : no
hlt_bug     : no
f00f_bug    : no
coma_bug    : no
fpu     : yes
fpu_exception   : yes
cpuid level : 6
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pebs bts pni dtes64 monitor ds_cpl est cid cx16 xtpr pdcm lahf_lm
bogomips    : 5983.43
clflush size    : 64
cache_alignment : 128
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor   : 1
vendor_id   : GenuineIntel
cpu family  : 15
model       : 6
model name  : Intel(R) Pentium(R) D CPU 3.00GHz
stepping    : 5
cpu MHz     : 2400.000
cache size  : 2048 KB
physical id : 0
siblings    : 2
core id     : 1
cpu cores   : 2
apicid      : 1
initial apicid  : 1
fdiv_bug    : no
hlt_bug     : no
f00f_bug    : no
coma_bug    : no
fpu     : yes
fpu_exception   : yes
cpuid level : 6
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pebs bts pni dtes64 monitor ds_cpl est cid cx16 xtpr pdcm lahf_lm
bogomips    : 5983.51
clflush size    : 64
cache_alignment : 128
address sizes   : 36 bits physical, 48 bits virtual
power management:

raja@badfox:~$ 

I know some of them like cpu type and core etc. , but mention the description for all .

Answer 1

Ok, This Is a Community Wiki, so Everyone fill in the information that you know, and we can make this a general answer. We can start with the description of the flags.

Information from http://www.sungju.org/?p=519 :

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”

processor : 0 -

vendor_id : GenuineIntel - The vendor id is "GenuineIntel" this tells you that your processor is Intel.

cpu family : 15 -

model : 6 -

model name : Intel(R) Pentium(R) D CPU 3.00GHz - The model name of the processor, you have a Pentium D that is the 3Ghz model

stepping : 5 -

cpu MHz : 2400.000 - The Mhz of your processor.

cache size : 2048 KB - how much cache your processor has

physical id : 0 -

siblings : 2 -

core id : 0 -

cpu cores : 2 -

apicid : 0 -

initial apicid : 0 -

fdiv_bug : no -

hlt_bug : no -

f00f_bug : no -

coma_bug : no -

fpu : yes -

fpu_exception : yes -

cpuid level : 6 -

wp : yes -

flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pebs bts pni dtes64 monitor ds_cpl est cid cx16 xtpr pdcm lahf_lm -

bogomips : 5983.43 -

clflush size : 64 -

cache_alignment : 128 -

address sizes : 36 bits physical, 48 bits virtual -

power management: -