LinuxQuestions.org - fedora-11-x86

this is what /proc/cpuinfo contain

Code:

processor        : 0

vendor_id        : GenuineIntel

cpu family        : 6

model                : 23

model name        : Intel(R) Core(TM)2 Duo CPU    T6400  @ 2.00GHz

stepping        : 10

cpu MHz                : 1200.000

cache size        : 2048 KB

physical id        : 0

siblings        : 2

core id                : 0

cpu cores        : 2

apicid                : 0

initial apicid        : 0

fdiv_bug        : no

hlt_bug                : no

f00f_bug        : no

coma_bug        : no

fpu                : yes

fpu_exception        : yes

cpuid level        : 13

wp                : yes

flags                : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm

bogomips        : 3989.44

clflush size        : 64

power management:



processor        : 1

vendor_id        : GenuineIntel

cpu family        : 6

model                : 23

model name        : Intel(R) Core(TM)2 Duo CPU    T6400  @ 2.00GHz

stepping        : 10

cpu MHz                : 1200.000

cache size        : 2048 KB

physical id        : 0

siblings        : 2

core id                : 1

cpu cores        : 2

apicid                : 1

initial apicid        : 1

fdiv_bug        : no

hlt_bug                : no

f00f_bug        : no

coma_bug        : no

fpu                : yes

fpu_exception        : yes

cpuid level        : 13

wp                : yes

flags                : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm

bogomips        : 3989.95

clflush size        : 64

power management:

i have read from the given thread that if flag contains lm then it said to be 64 bit
http://www.linuxquestions.org/questi...9/#post3669808

Quote:

Originally Posted by johnsfine (Post 3669808)

Yes. The output you quoted shows your CPU is 64 bit.

That is an even more certain way to know your CPU is 64

That line tells you it is 64 bit. Notice the lm (meaning "long mode") that I highlighted.

That line also tells you your cpu is 64 bit.

All 32 bit x86 cpu's have 32 bit virtual addressing. All current x86-64 cpus have 48 bit virtual addressing. Future 64 bit cpus are expected to have more than 48 bit addressing.

The physical address size is more varied by CPU model. A 32 bit cpu could have 36 bit physical addresses. Apparently a 64 bit cpu also can have 36 bit physical addresses (I think typical 64 bit cpus have 38 or more bits physical address).