What do "processor" and "cpu cores" mean in /proc/cpuinfo?

07
2014-07
  • why

    Possible Duplicate:
    Difference Between Cores and Processors

    What do "processor" and "cpu cores" mean here?

    cat /proc/cpuinfo 
    processor   : 0
    vendor_id   : GenuineIntel
    cpu family  : 6
    model       : 15
    model name  : Intel(R) Core(TM)2 Duo CPU     T5670  @ 1.80GHz
    stepping    : 13
    cpu MHz     : 1801.000
    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 : 10
    wp      : yes
    flags       : fpu vme de pse tsc msr pae mce cx8 apic 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 aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dts
    bogomips    : 3591.62
    clflush size    : 64
    cache_alignment : 64
    address sizes   : 36 bits physical, 48 bits virtual
    power management:

    processor   : 1
    vendor_id   : GenuineIntel
    cpu family  : 6
    model       : 15
    model name  : Intel(R) Core(TM)2 Duo CPU     T5670  @ 1.80GHz
    stepping    : 13
    cpu MHz     : 800.000
    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 : 10
    wp      : yes
    flags       : fpu vme de pse tsc msr pae mce cx8 apic 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 aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dts
    bogomips    : 3590.97
    clflush size    : 64
    cache_alignment : 64
    address sizes   : 36 bits physical, 48 bits virtual
    power management:
    • Answers
  • Pops

    In this case processor is just an identifier (which starts at 0). You have two processors, so they're 0 and 1. CPU cores means the number of cores in each physical processor (two here).

  • Matt

    It is two processor cores on one die essentially like having a dual processor system in one processor.

    The central processing unit (CPU) is the portion of a computer system that carries out the instructions of a computer program, and is the primary element carrying out the computer's functions.


    • Related Question

    linux - Determine Socket from /proc/cpuinfo
  • David Grant

    Is there a simple way to determine the CPU socket from the output of /proc/cpuinfo. Determining the type of processor is simple enough, but the processor I have (Celeron) has two different possible sockets. The output of /proc/cpuinfo is:

    processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Celeron(R) CPU 2.66GHz
stepping : 9
cpu MHz : 2672.411
cache size : 256 KB
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 mtrr pge mca cmov pat     pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc up pebs bts pni dtes64 monitor ds_cpl tm2 cid cx16 xtpr lahf_lm
bogomips : 5344.82
clflush size : 64
power management:

    I've looked on the Intel processor finder web site with appropriate filters, but the stepping values do not appear to match anything.


    • Related Answers
  • Iain

    lshw will show you the socket

    sudo lshw -class cpu