linux 下查看机器是cpu是几核的
几个cpu
more /proc/cpuinfo |grep “physical id”|uniq|wc -l
每个cpu是几核(假设cpu配置相同)
more /proc/cpuinfo |grep “physical id”|grep “0”|wc -l
cat /proc/cpuinfo | grep processor
1. 查看物理CPU的个数
#cat /proc/cpuinfo |grep “physical id”|sort |uniq|wc -l
2. 查看逻辑CPU的个数
#cat /proc/cpuinfo |grep “processor”|wc -l
3. 查看CPU是几核
#cat /proc/cpuinfo |grep “cores”|uniq
4. 查看CPU的主频
#cat /proc/cpuinfo |grep MHz|uniq
# uname -a
Linux euis1 2.6.9-55.ELsmp #1 SMP Fri Apr 20 17:03:35 EDT 2007 i686 i686 i386 GNU/Linux
(查看当前操作系统内核信息)
# cat /etc/issue | grep Linux
Red Hat Enterprise Linux AS release 4 (Nahant Update 5)
(查看当前操作系统发行版信息)
# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
8 Intel(R) Xeon(R) CPU E5410 @ 2.33GHz
(看到有8个逻辑CPU, 也知道了CPU型号)
# cat /proc/cpuinfo | grep physical | uniq -c
4 physical id : 0
4 physical id : 1
(说明实际上是两颗4核的CPU)
# getconf LONG_BIT
32
(说明当前CPU运行在32bit模式下, 但不代表CPU不支持64bit)
# cat /proc/cpuinfo | grep flags | grep ‘ lm ‘ | wc -l
8
(结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit)
如何获得CPU的详细信息:
linux命令:cat /proc/cpuinfo
用命令判断几个物理CPU,几个核等:
逻辑CPU个数:
# cat /proc/cpuinfo | grep “processor” | wc -l
物理CPU个数:
# cat /proc/cpuinfo | grep “physical id” | sort | uniq | wc -l
每个物理CPU中Core的个数:
# cat /proc/cpuinfo | grep “cpu cores” | wc -l
是否为超线程?
如果有两个逻辑CPU具有相同的”core id”,那么超线程是打开的。
每个物理CPU中逻辑CPU(可能是core, threads或both)的个数:
# cat /proc/cpuinfo | grep “siblings”