如何知道linux服务器CPU是多少位的， CPU有几个是几核？

1.查看CPU是多少位？

#grepflag/proc/cpuinfo如果发现cpu特性有lm,ia64或者amd64，就表示这个CPU是64位的

也可以安装lshw这个rpm包或者tarball源码，执行可以看到cpu的bitwise这一项，64表示64位的cpu

2.查看该服务器有多少个CPU，CPU是几核的？

#grepprocessor|wc-l可以确定这个服务的CPU个数*核数

#grepphysical

Understanding/proc/cpuinfo

Example:

$uname-r

2.6.18-8.el5

Howmanyphysicalprocessorsarethere?

$grep'physicalid'/proc/cpuinfo|sort|uniq|wc-l

2

Howmanyvirtualprocessorsarethere?

$grep^processor/proc/cpuinfo|wc-l

4

Aretheprocessorsdual-core(ormulti-core)?

$grep'cpucores'/proc/cpuinfo

cpucores:2

cpucores:2

cpucores:2

cpucores:2

"2"indicatesthetwophysicalprocessorsaredual-core,resultingin4virtualprocessors.

If"1"wasreturned,thetwophysicalprocessorsaresingle-core.Iftheprocessorsaresingle-core,andthenumberofvirtualprocessorsisgreaterthanthenumberofphysicalprocessors,theCPUsareusinghyper-threading.Hyper-threadingissupportedifhtispresentintheCPUflagsandyouareusinganSMPkernel.

Aretheprocessors64-bit?

A64-bitprocessorwillhavelm("longmode")intheflagssectionofcpuinfo.A32-bitprocessorwillnot.

e.g.,

flags:fpuvmedepsetscmsrpaemcecx8apicmtrrpgemcacmovpatpse36clflushmmxfxsrssesse2htsyscallnxmmxextfxsr_optlm3dnowext3dnowpnicx16lahf_lmcmp_legacysvmcr8legacytsfidvidttptmstc

WhatdotheCPUflagsmean?

TheCPUflagsarebrieflydescribedinthekernelheaderfilecpufeature.h

附：查看操作系统是多少位？

1.最直接的，ls/看下/目录下是不是有/lib64这个目录

2.getconfLONG_BIT看输出