View CPU information under Ubuntu

View CPU Information Cat/proc/cpuinfo

Several CPUs

More/proc/cpuinfo |grep "Physical ID" |uniq|wc-l

Each CPU is a few cores (assuming the same CPU configuration)

More/proc/cpuinfo |grep "Physical id" |grep "0" |wc-l

Cat/proc/cpuinfo | grep processor

1. View the number of physical CPUs
#cat/proc/cpuinfo |grep "Physical id" |sort |uniq|wc-l

2. View the number of logical CPUs
#cat/proc/cpuinfo |grep "Processor" |wc-l

3. View CPU is a few cores
#cat/proc/cpuinfo |grep "Cores" |uniq

4. Check the CPU frequency
#cat/proc/cpuinfo |grep Mhz|uniq

# Uname-a

Linux euis1 2.6.9-55.ELSMP #1 SMP Fri April 17:03:35 EDT i686 i686 i386 gnu/linux

(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 8 logical CPUs, also know the CPU model)

# Cat/proc/cpuinfo | grep physical | uniq-c

4 Physical id:0

4 Physical Id:1

(Description is actually two 4-core CPUs)

# getconf long_bit

32

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

# Cat/proc/cpuinfo | grep flags | grep ' LM ' | wc-l

8

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

How to obtain detailed information about the CPU:

Linux command: Cat/proc/cpuinfo

Use the command to determine several physical CPUs, several cores, etc.:

Number of logical CPUs:
# Cat/proc/cpuinfo | grep "Processor" | Wc-l

Number of physical CPUs:
# Cat/proc/cpuinfo | grep "Physical ID" | Sort | Uniq | Wc-l

Number of cores per physical CPU:
# Cat/proc/cpuinfo | grep "CPU Cores" | Wc-l

Is it hyper-threading?
If there are two logical CPUs with the same "core ID", then Hyper-threading is turned on.

The number of logical CPUs (possibly cores, threads, or both) in each physical CPU:
# Cat/proc/cpuinfo | grep "Siblings"

View CPU information under Ubuntu