LinuxQuestions.org - 32 or 64 bit processor

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32 or 64 bit processor

Operating System RedHat Enterprise 4

Is there a command to determine if your processor is 32 or 64 ?

Code:

uname -p

if output is x86_64 it is a 64bit processor, if it is i686 (or similar) the cpu is 32bit. Sometimes the output is unknown, but I've never seen it!

Looks like I have one of those instances..

Code:

it-etch:/etc# uname -p

unknown

lets try another approach

Code:

it-etch:/etc# cat /proc/cpuinfo

processor      : 0

vendor_id      : GenuineIntel

cpu family      : 15

model          : 4

model name      : Intel(R) Pentium(R) D CPU 2.80GHz

stepping        : 7

cpu MHz        : 2800.329

cache size      : 1024 KB

physical id    : 0

siblings        : 2

core id        : 0

cpu cores      : 2

fdiv_bug        : no

hlt_bug        : no

f00f_bug        : no

coma_bug        : no

fpu            : yes

fpu_exception  : yes

cpuid level    : 5

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 pni monitor ds_cpl cid cx16 xtpr lahf_lm

bogomips        : 5605.53



processor      : 1

vendor_id      : GenuineIntel

cpu family      : 15

model          : 4

model name      : Intel(R) Pentium(R) D CPU 2.80GHz

stepping        : 7

cpu MHz        : 2800.329

cache size      : 1024 KB

physical id    : 0

siblings        : 2

core id        : 1

cpu cores      : 2

fdiv_bug        : no

hlt_bug        : no

f00f_bug        : no

coma_bug        : no

fpu            : yes

fpu_exception  : yes

cpuid level    : 5

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 pni monitor ds_cpl cid cx16 xtpr lahf_lm

bogomips        : 5600.59

cat /proc/cpuinfo didn't provide any info lets see what lshw reveals

Code:

it-etch:/etc# lshw





    *-cpu

          description: CPU

          product: Intel(R) Pentium(R) D CPU 2.80GHz

          vendor: Intel Corp.

          physical id: 400

          bus info: cpu@0

          version: 15.4.7

          serial: 0000-0F47-0000-0000-0000-0000

          slot: Microprocessor

          size: 2800MHz

          width: 64 bits

          clock: 800MHz

          capabilities: fpu fpu_exception wp 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 x86-64 constant_tsc pni monitor ds_cpl cid cx16 xtpr lahf_lm

          configuration: id=1

        *-cache:0

            description: L1 cache

            physical id: 700

            size: 16KB

            capacity: 16KB

            capabilities: internal write-back data

        *-cache:1

            description: L2 cache

            physical id: 701

            size: 2MB

            capacity: 2MB

            capabilities: internal varies unified

        *-logicalcpu:0

            description: Logical CPU

            physical id: 1.1

            width: 64 bits

            capabilities: logical

        *-logicalcpu:1

            description: Logical CPU

            physical id: 1.2

            width: 64 bits

            capabilities: logical

eureka, when all else fails lshw still manages to pull out more info

dmidecode can also extract info from the system, lshw actually uses dmidecode to gather some info, but lshw formats the data output a lot nicer.

Me, too.

Code:

debian64:~$ uname -p

unknown

debian64:~$

I like infobash:

Code:

debian64:~$ infobash 0

CPU[AMD Athlon 64 3200+ clocked at 1989.871 Mhz]  Kernel[Linux 2.6.22-1-amd64 x86_64]  Up[-2days-]  Mem[-226.0/436.6MB-]  HDD[-160GB(57%used)-]  Procs[-97-]  Client[Shell]

debian64:~$

Thank you, guys! It looks like "uname -p" does not recognize the first 64-bit processors for personal computers (Athlon64 and Pentium D). And now the op have a lot of options to retrieve the information he was looking for! :)

Edit: ..and just for completeness, I post results on a 32-bit machine:

Code:

linux # uname -p

i686



linux # lshw -C processor

  *-cpu

      description: CPU

      product: Genuine Intel(R) CPU          T2300  @ 1.66GHz

      vendor: Intel Corp.

      physical id: 4

      bus info: cpu@0

      version: 6.14.8

      serial: 0000-06E8-0000-0000-0000-0000

      slot: N/A

      size: 1GHz

      capacity: 1GHz

      width: 32 bits

      clock: 167MHz

      capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr cpufreq

      configuration: id=0

    *-logicalcpu:0

          description: Logical CPU

          physical id: 0.1

          width: 32 bits

          capabilities: logical

    *-logicalcpu:1

          description: Logical CPU

          physical id: 0.2

          width: 32 bits

          capabilities: logical

Quote:

Originally Posted by rickh (Post 2867202)

Me, too.

I like infobash:

Code:

debian64:~$ infobash 0

CPU[AMD Athlon 64 3200+ clocked at 1989.871 Mhz]  Kernel[Linux 2.6.22-1-amd64 x86_64]  Up[-2days-]  Mem[-226.0/436.6MB-]  HDD[-160GB(57%used)-]  Procs[-97-]  Client[Shell]

debian64:~$

Did you install infobash manually ?

I fail to find infobash in any of the Debian package listing for stable, testing, or unstable...

Just curious.

I actually activated this Sidux repo temporarily so I could install it with Aptitude.

Code:

#deb http://sidux.com/debian/ sid main

#deb-src http://sidux.com/debian/ sid main

Thanks to all for info and quick response...