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    • Virtualization apps can't detect all the CPU cores
    Community Discussion 989 views · 4 replies ·
    Tofloor
    poster avatar
    savanweylyn
    deepin
    2017-01-20 00:06
    Author
    Since I've installed Deepin on an SSD, none of the virtualization apps (vmWare Workstation, VirtualBox, qemu-kvm) can onyl detect two of the four CPU cores. Why?

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    HualetWang
    deepin
    2017-01-20 01:12
    #1
    Have you checked in the System Monitor application and confirmed that the host machine is running 4 cores instead of 2 ?
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    yangbo
    deepin
    2017-01-20 01:24
    #2
    Not sure about this. Maybe hyperthread?
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    savanweylyn
    deepin
    2017-01-20 01:54
    #3
    https://bbs.deepin.org/post/134319
    Have you checked in the System Monitor application and confirmed that the host machine is running 4  ...

    Yes. It shows that the host machine is running 2 cores. While the host has 4 CPU cores. Output of lscpu shows this:

    CPU(s):                         4
    On-line CPU(s) list:     0,3
    Off-line CPU(s) list:     1,2
    Thread(s) per core:    1
    Core(s) per socket:     2
    Socket(s):                      1
    NUMA node(s):            1
    Vendor ID:                     AuthenticAMD
    CPU family:                   22
    Model:                            48
    Model name:                AMD A6-6310 APU with AMD Radeon R4 Graphics
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    savanweylyn
    deepin
    2017-01-20 08:56
    #4
    Problem solved. It was caused by Laptop Mode Tools' cpuhotplug module. It supposed to disable idle CPU cores when on battery,.

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