linux 查看cpu 多核与多U
# uname -a
Linuxlocalhost.localdomain2.6.18-194.el5#1SMPTueMar1621:52:39EDT2010x86_64x86_64x86_64GNU/Linux
(查看当前操作系统内核信息)
#cat/etc/issue|grepLinux
RedHatEnterpriseLinuxASrelease4(NahantUpdate5)
(查看当前操作系统发行版信息)
#cat/proc/cpuinfo|grepname|cut-f2-d:|uniq-c
8Intel(R)Xeon(R)[email protected]
(看到有8个逻辑CPU,也知道了CPU型号)
#cat/proc/cpuinfo|grepphysical|uniq-c
4physicalid:0
4physicalid:1
(说明实际上是两颗4核的CPU)
#getconfLONG_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|grepflags|grep'lm'|wc-l
8
(结果大于0,说明支持64bit计算.lm指longmode,支持lm则是64bit)
.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'ProcessorInformation$'
ProcessorInformation
SocketDesignation:CPU1
Type:CentralProcessor
Family:Xeon
Manufacturer:Intel
ID:7A060100FFFBEBBF
Signature:Type0,Family6,Model17,SteppingA
Flags:
FPU(Floating-pointuniton-chip)
VME(Virtualmodeextension)
DE(Debuggingextension)
PSE(Pagesizeextension)
TSC(Timestampcounter)
MSR(Modelspecificregisters)
PAE(Physicaladdressextension)
MCE(Machinecheckexception)
CX8(CMPXCHG8instructionsupported)
APIC(On-chipAPIChardwaresupported)
SEP(Fastsystemcall)
MTRR(Memorytyperangeregisters)
PGE(Pageglobalenable)
MCA(Machinecheckarchitecture)
CMOV(Conditionalmoveinstructionsupported)
PAT(Pageattributetable)
PSE-36(36-bitpagesizeextension)
CLFSH(CLFLUSHinstructionsupported)
DS(Debugstore)
ACPI(ACPIsupported)
MMX(MMXtechnologysupported)
FXSR(Fastfloating-pointsaveandrestore)
SSE(StreamingSIMDextensions)
SSE2(StreamingSIMDextensions2)
SS(Self-snoop)
HTT(Hyper-threadingtechnology)
TM(Thermalmonitorsupported)
SBF(SignalbreakonFERR)
Version:Intel(R)Xeon(R)[email protected]
Voltage:1.2V
ExternalClock:333MHz
MaxSpeed:2333MHz
CurrentSpeed:2333MHz
Status:Populated,Enabled
Upgrade:<OUTOFSPEC>
L1CacheHandle:0x0005
L2CacheHandle:0x0006
L3CacheHandle:0x0007
SerialNumber:ToBeFilledByO.E.M.
AssetTag:ToBeFilledByO.E.M.
PartNumber:ToBeFilledByO.E.M.
--
ProcessorInformation
SocketDesignation:CPU2
Type:CentralProcessor
Family:Xeon
Manufacturer:Intel
ID:7A060100FFFBEBBF
Signature:Type0,Family6,Model17,SteppingA
Flags:
FPU(Floating-pointuniton-chip)
VME(Virtualmodeextension)
DE(Debuggingextension)
PSE(Pagesizeextension)
TSC(Timestampcounter)
MSR(Modelspecificregisters)
PAE(Physicaladdressextension)
MCE(Machinecheckexception)
CX8(CMPXCHG8instructionsupported)
APIC(On-chipAPIChardwaresupported)
SEP(Fastsystemcall)
MTRR(Memorytyperangeregisters)
PGE(Pageglobalenable)
MCA(Machinecheckarchitecture)
CMOV(Conditionalmoveinstructionsupported)
PAT(Pageattributetable)
PSE-36(36-bitpagesizeextension)
CLFSH(CLFLUSHinstructionsupported)
DS(Debugstore)
ACPI(ACPIsupported)
MMX(MMXtechnologysupported)
FXSR(Fastfloating-pointsaveandrestore)
SSE(StreamingSIMDextensions)
SSE2(StreamingSIMDextensions2)
SS(Self-snoop)
HTT(Hyper-threadingtechnology)
TM(Thermalmonitorsupported)
SBF(SignalbreakonFERR)
Version:Intel(R)Xeon(R)[email protected]
Voltage:1.2V
ExternalClock:333MHz
MaxSpeed:2333MHz
CurrentSpeed:2333MHz
Status:Populated,Enabled
Upgrade:<OUTOFSPEC>
L1CacheHandle:0x0009
L2CacheHandle:0x000A
L3CacheHandle:0x000B
SerialNumber:ToBeFilledByO.E.M.
AssetTag:ToBeFilledByO.E.M.
PartNumber:ToBeFilledByO.E.M.
--END--