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jini
Asked: 2011-04-24 18:29:14 +0800 CST

How to find out if my debian server setup is a dual core or not?

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I have access to root and would like to find out.

central-processing-unit debian

2 Answers

  1. The place to look is /proc/cpuinfo, as others have said. However, at a glance this does not tell you whether a server is dual-core. If you see two entries, it could be because

    • the server has one processor with two cores
    • the server has one processor that supports hyperthreading
    • the server has two processors with one core each

    For example, take this information from cpuinfo.

    $ grep processor /proc/cpuinfo
processor   : 0
processor   : 1
processor   : 2
processor   : 3
processor   : 4
processor   : 5
processor   : 6
processor   : 7

    I can see that there are 8 logical processors, but I don't know how many CPUs and cores there are.

    $ grep 'physical id' /proc/cpuinfo
physical id : 0
physical id : 0
physical id : 0
physical id : 0
physical id : 0
physical id : 0
physical id : 0
physical id : 0

    Now I know there is only one CPU, but I don't know if it has 8 cores or 4 cores and hyperthreading.

    $ grep 'core id' /proc/cpuinfo
core id     : 0
core id     : 1
core id     : 2
core id     : 3
core id     : 0
core id     : 1
core id     : 2
core id     : 3

    Now I have the complete picture; this is a single quad-core CPU with hyperthreading.

    • 5
  2. Best Answer
    $ cat /proc/cpuinfo

    That should give info about how many cores are available and which type they are.

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