Re: physical processors or dual core or just HT

On Monday 11 September 2006 13:16, str tux wrote:
Guys,

How I will know whether I'm using real dual processors or it
is a dual core or just a machine having Hyper Threading.

Is there any commands?

cat /proc/cpuinfo

A dual core has 'core id' and 'cpu cores' or similar entries, HT
has 'ht' in the flags line. For example, my 2GHz Centrino
notebook:

alan@gentoo ~ $ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Pentium(R) M processor 2.00GHz
stepping : 8
cpu MHz : 800.000
cache size : 2048 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 pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm
pbe nx est tm2
bogomips : 1598.90

And one of the work servers (dual P4 HT):

[alanm@dot ~]$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 3
model name : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping : 3
cpu MHz : 2801.152
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 : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr
pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht
tm pbe pni monitor ds_cpl cid
bogomips : 5603.94

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 3
model name : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping : 3
cpu MHz : 2801.152
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 : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr
pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht
tm pbe pni monitor ds_cpl cid
bogomips : 5599.48

alan

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