On 1/17/07, Robert Love <rml@novell.com> wrote:
On Wed, 2007-01-17 at 21:23 +0100, Per Jessen wrote:
So, does my Celeron processor support hyperthreading? I'm fairly certain it does not, which is why the HT flag seems to be misplaced.
Your processor does support hyperthreading, architecturally speaking, hence the HT flag. But you have only one virtual core. So for all practical purposes, your chip is not hyperthreaded.
To programmatically see if a chip physically has HT cores, you have to look at the "physical id" and "core id" fields. And the Prescott-based Celeron D family, such as yours, supports SSE 2 and 3.
Ah, interesting. How do you tell from my cpuinfo that it is a Celeron D?
Just from the name and the speed and the other flags.
And is there an SSE3 indicator/flag?
Yes, PNI (stands for Prescott New Instructions).
Robert hey fellows and gals, this confuses me to no end.<sigh>
here is my cat /proc/info processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 3 model name : Intel(R) Pentium(R) 4 CPU 2.80GHz stepping : 4 cpu MHz : 2806.601 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 3 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pni monitor ds_cpl cid xtpr bogomips : 5616.79 processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 3 model name : Intel(R) Pentium(R) 4 CPU 2.80GHz stepping : 4 cpu MHz : 2806.601 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 3 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pni monitor ds_cpl cid xtpr bogomips : 5613.15 It sure looks like I have 2 processors. What say you?
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