Re: [dmidecode] Flag handling for Intel E5405 CPUs

[Francois Gaudreault]

Bonjour :)

I see.  Thanks for explaining this to me :)

On 12-05-28 4:28 PM, Jean Delvare wrote:
> Bonjour François,
>
> On Mon, 28 May 2012 14:55:05 -0400, Francois Gaudreault wrote:
> > Just a simple question here. I know this is a quite old CPU, but I would
> > like to know why HTT is listed in the flag list while Hyper-Threading is
> > not supported on E5400 Series of Intel?  Is this an OS limitation or
> > BIOS buggy stuff?
>
> Neither. The HTT flag is described as "Multi-Threading" in recent
> versions of the Intel CPUID document [1], not "Hyper-Threading". In
> more details, the document says: "The physical processor package is
> capable of supporting more than one logical processor." This covers both
> hyper-threading (which your CPU doesn't implement) and multi-core
> (which your CPU does implement.) So it's OK for your CPU to have the
> HTT flag set and thus OK for dmidecode to tell you so.
>
> [1] http://www.intel.com/Assets/PDF/appnote/241618.pdf


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