How to view CPU information, including bits and multi-core information, under Linux __linux

Linux euis1 2.6.9-55.elsmp #1 SMP Fri Apr 17:03:35 EDT 2007 i686 i686 i386

(view current operating system kernel information)

# Cat/etc/issue | grep Linux

Red Hat Enterprise Linux as Release 4 (Nahant Update 5)

(View current operating system release information)

# Cat/proc/cpuinfo | grep name | Cut-f2-d: | Uniq-c

8 Intel (R) Xeon (r) CPU E5410 @ 2.33GHz

(see there are 8 logical CPUs, also know the CPU model)

# Cat/proc/cpuinfo | grep Physical | Uniq-c

4 Physical id:0

4 Physical Id:1

(It's actually two 4-core CPUs)

# getconf Long_bit

32

(indicates that the current CPU is running in 32bit mode, but does not mean CPU does not support 64bit)

# Cat/proc/cpuinfo | grep Flags | grep ' LM ' | Wc-l

8

(The result is greater than 0, which indicates support for 64bit calculation. LM refers to long mode, support LM is 64bit)

Finally, a complete look at the CPU physical information, but most of us do not care about it.

Processor Information
Socket DESIGNATION:CPU 1
Type:central Processor
Family:xeon
Manufacturer:intel
id:7a FF FB-EB BF
Signature:type 0, Family 6, Model, stepping A
Flags:
FPU (floating-point unit on-chip)
VME (Virtual mode extension)
DE (Debugging extension)
PSE (Page size extension)
TSC (time stamp counter)
MSR (Model specific registers)
PAE (Physical Address Extension)
MCE (Machine Check exception)
CX8 (CMPXCHG8 instruction supported)
APIC (on-chip APIC Hardware supported)
SEP (Fast system call)
MTRR (Memory type range registers)
PGE (Page Global Enable)
MCA (Machine Check Architecture)
Cmov (Conditional move instruction supported)
PAT (Page attribute table)
PSE-36 (36-bit page size extension)
CLFSH (Clflush instruction supported)
DS (Debug Store)
ACPI (ACPI supported)
MMX (MMX technology supported)
FXSR (Fast floating-point save and restore)
SSE (streaming SIMD extensions)
SSE2 (streaming SIMD extensions 2)
SS (Self-snoop)
HTT (hyper-threading Technology)
TM (Thermal monitor supported)
SBF (Signal break on Ferr)
Version:intel (R) Xeon (r) CPU E5410 @ 2.33GHz
voltage:1.2 V
External clock:333 MHz
Max speed:2333 MHz
Current speed:2333 MHz
status:populated, Enabled
Upgrade:
L1 Cache handle:0x0005
L2 Cache handle:0x0006
L3 Cache handle:0x0007
Serial number:to is filled by O.E.M.
Asset tag:to is filled by O.E.M.
Part number:to is filled by O.E.M.
--
Processor Information
Socket DESIGNATION:CPU 2
Type:central Processor
Family:xeon
Manufacturer:intel
id:7a FF FB-EB BF
Signature:type 0, Family 6, Model, stepping A
Flags:
FPU (floating-point unit on-chip)
VME (Virtual mode extension)
DE (Debugging extension)
PSE (Page size extension)
TSC (time stamp counter)
MSR (Model specific registers)
PAE (Physical Address Extension)
MCE (Machine Check exception)
CX8 (CMPXCHG8 instruction supported)
APIC (on-chip APIC Hardware supported)
SEP (Fast system call)
MTRR (Memory type range registers)
PGE (Page Global Enable)
MCA (Machine Check Architecture)
Cmov (Conditional move instruction supported)
PAT (Page attribute table)
PSE-36 (36-bit page size extension)
CLFSH (Clflush instruction supported)
DS (Debug Store)
ACPI (ACPI supported)
MMX (MMX technology supported)
FXSR (Fast floating-point save and restore)
SSE (streaming SIMD extensions)
SSE2 (streaming SIMD extensions 2)
SS (Self-snoop)
HTT (hyper-threading Technology)
TM (Thermal monitor supported)
SBF (Signal break on Ferr)
Version:intel (R) Xeon (r) CPU E5410 @ 2.33GHz
voltage:1.2 V
External clock:333 MHz
Max speed:2333 MHz
Current speed:2333 MHz
status:populated, Enabled
Upgrade:
L1 Cache handle:0x0009
L2 Cache handle:0x000a
L3 Cache handle:0x000b
Serial number:to is filled by O.E.M.
Asset tag:to is filled by O.E.M.
Part number:to is filled by O.E.M.

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