Linux下如何查看CPU信息, 包括位数和多核信息

题记：今天看到一篇关于查看CPU和操作系统信息的文章，转过来和大家分享一下，O(∩_∩)O！

了解cpu架构   http://blog.csdn.net/wyzxg/archive/2009/12/17/5027738.aspx

前两天简单总结了cpu架构，今天总结下查看各种os系统的位数和cpu硬件支持的位数，因为这些我们在日常工作中要经常用到的，作为日常的一个备忘录，总结下可以加强自己的记忆，也可以让自己在总体上有个认识；每间隔一段时间就总结下，慢慢你会发现优点是大大滴啊

1.查看linux的操作系统和硬件cpu位数

linux 操作系统的位数查看

getconf LONG_BIT 如果是32表示是32位

eg:

[root@db ~]# getconf LONG_BIT
32

[root@db ~]# getconf WORD_BIT
32

或者通过cat /proc/cpuinfo也可以查看

再或者

[root@svr-db-test ~]# file /sbin/init
/sbin/init: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped

查看cpu硬件架构

在Linux中使用命令arch可以初步查看出当前系统所识别出来的机器CPU类型，
如"i386", "i486","i586", "alpha", "sparc", "arm", "m68k",
"mips", "ppc","ia64","x86_64"等；ia64和x86_64就说明这台机器是64位的；

eg:

[root@db ~]# arch
i686

或者

[root@svr-db-test ~]# uname -m
x86_64

或者

[root@svr-db-test ~]# echo $HOSTTYPE
x86_64

2. 查看windows的操作系统和硬件cpu位数

Microsoft Windows XP [版本 5.1.2600]
(C) 版权所有 1985-2001 Microsoft Corp.

C:/Documents and Settings/Administrator>systeminfo

主机名:           LUOBO-090566BDE
OS 名称:          Microsoft Windows XP Professional
OS 版本:          5.1.2600 Service Pack 3 Build 2600
OS 制造商:        Microsoft Corporation
OS 配置:          独立工作站
OS 构件类型:      Multiprocessor Free
注册的所有人:     微软用户
注册的组织:       微软中国
产品 ID:          76481-640-1464517-23673
初始安装日期:     2009-9-2, 10:16:44
系统启动时间:     0 天 0 小时 35 分 35 秒
系统制造商:       Dell Inc.
系统型号:         MXC061
系统类型:         X86-based PC
处理器:           安装了 1 个处理器。
                  [01]: x86 Family 6 Model 14 Stepping 12 GenuineIntel ~1728 Mhz

BIOS 版本:        DELL   - 27d70402
Windows 目录:     C:/WINDOWS
系统目录:         C:/WINDOWS/system32
启动设备:         /Device/HarddiskVolume1
系统区域设置:     zh-cn;中文(中国)
输入法区域设置:   zh-cn;中文(中国)
时区:             暂缺
物理内存总量:     2,038 MB
可用的物理内存:   1,554 MB
虚拟内存: 最大值: 2,048 MB
虚拟内存: 可用:   1,992 MB
虚拟内存: 使用中: 56 MB
页面文件位置:     C:/pagefile.sys
域:               WORKGROUP
登录服务器:       //LUOBO-090566BDE
修补程序:         安装了 143 个修补程序。
.

3. AIX查看硬件cpu位数和os位数

显示机器硬件是32位还是64位
# bootinfo -y
64

查看aix操作系统是32位还是64位

# bootinfo -K
64

PS：原文地址--http://blog.csdn.net/wyzxg/archive/2009/12/22/5054617.aspx

 

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/tcsbupt/archive/2010/07/14/5733885.aspx

 

 

 

Linux下如何查看CPU信息, 包括位数和多核信息
# 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)

.

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最后再完整看cpu物理信息, 不过大部分我们都不关心而已.

 

 

# dmidecode | grep -A48 'Processor Information$'
        Processor Information
                Socket Designation: CPU 1
                Type: Central Processor
                Family: Xeon
                Manufacturer: Intel           
                ID: 7A 06 01 00 FF FB EB BF
                Signature: Type 0, Family 6, Model 17, 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: <OUT OF SPEC>
                L1 Cache Handle: 0x0005
                L2 Cache Handle: 0x0006
                L3 Cache Handle: 0x0007
                Serial Number: To Be Filled By O.E.M.
                Asset Tag: To Be Filled By O.E.M.
                Part Number: To Be Filled By O.E.M.
--
        Processor Information
                Socket Designation: CPU 2
                Type: Central Processor
                Family: Xeon
                Manufacturer: Intel           
                ID: 7A 06 01 00 FF FB EB BF
                Signature: Type 0, Family 6, Model 17, 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: <OUT OF SPEC>
                L1 Cache Handle: 0x0009
                L2 Cache Handle: 0x000A
                L3 Cache Handle: 0x000B
                Serial Number: To Be Filled By O.E.M.
                Asset Tag: To Be Filled By O.E.M.
                Part Number: To Be Filled By O.E.M.

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