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    SubjectRe: Wrong number of cpus detected/reported
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    Date
    On Tue, 2003-06-10 at 14:36, Samuel Flory wrote:
    > John Appleby wrote:
    >
    > >>After the upgrade the system is reporting that the machine has 8 cpu
    > >>instead of 4. I have been looking for some kind of information on the
    > >>Internet (www.google.com/linux) about that but I didn't have success.
    > >>
    > >>
    > >
    > >I suspect that it is identifying 4 Xeon CPUs with Hyperthreading, which
    > >will correctly double the amount of processors your kernel thinks you
    > >have. Intel's Hyperthreading
    > >
    > >This ought to be a good thing... the only thing I don't quite understand
    > >is that I thought Hyperthreading was added in 2.4.17.
    > >
    > >
    > >
    >
    > Red Hat enabled basic hyperthreading support in their 2.4.9 eratta
    > kernels some where along the line. I just didn't think 1.4 Xeons did
    > HT. (Maybe the MP Xeons are different from the DP xeons.)

    His does. From his cpuinfo:

    processor : 7
    vendor_id : GenuineIntel
    cpu family : 15
    model : 1
    model name : Intel(R) Xeon(TM) CPU 1.40GHz
    stepping : 1
    cpu MHz : 1399.982
    cache size : 256 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
    bogomips : 2798.38

    See that ht flag near the end?

    Don't know why he doesn't go with RH 9 or RH AS though.

    Steven

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