View CPU information under Linux system
View CPU information (model):
# cat /proc/cpuinfo| grep name | cut -f2 -d: | uniq -c
8 Intel(R) Xeon(R) CPU E5410 @ 2.33GHz
(I saw that there are 8 logical CPUs, and I also knew the CPU model)
Check the number of logical CPUs:
#cat /proc/cpuinfo|grep "processor"|sort -u|wc -l
24
Check the number of physical CPUs:
#grep"physical id" /proc/cpuinfo|sort -u|wc-l
2
#grep"physical id" /proc/cpuinfo|sort-u
physical id : 0
physical id : 1
Check the number of cores per physical CPU:
#grep "cpucores" /proc/cpuinfo|uniq
cpu cores : 6
Number of logical CPUs on each physical CPU:
#grep"siblings" /proc/cpuinfo|uniq
siblings : 12
Determine whether the hyper-copy thread is enabled:
If the "physical id" and "core id" of multiple logical CPUs are the same, it means that hyperthreading is enabled
Or in other words
Number of logical CPUs > Number of physical CPUs * Number of CPU cores enabled Hyperthreading
Number of logical CPUs = Number of physical CPUs * Number of CPU cores not enabled hyperthreading
Query all information at once: 1
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19#!/bin/bash
physicalNumber=0
coreNumber=0
logicalNumber=0
HTNumber=0
logicalNumber=$(grep "processor" /proc/cpuinfo|sort -u|wc -l)
physicalNumber=$(grep "physical id" /proc/cpuinfo|sort -u|wc -l)
coreNumber=$(grep "cpu cores" /proc/cpuinfo|uniq|awk -F':' '{print $2}'|xargs)
HTNumber=$((logicalNumber / (physicalNumber * coreNumber)))
echo "****** CPU Information ******"
echo "Logical CPU Number : ${logicalNumber}"
echo "Physical CPU Number : ${physicalNumber}"
echo "CPU Core Number : ${coreNumber}"
echo "HT Number : ${HTNumber}"
echo "*****************************"
Execution results:
#./cpuinfo
****** CPU Information ******
Logical CPU Number : 24
Physical CPU Number : 2
CPU Core Number : 6
HT Number : 2
*****************************