Core 3 is faster?

[Charr]

I was looking at /proc/cpuinfo today for my i7, and noticed that core 3 was reported faster than the others, and I have no idea why. Its a 920 at 200x19, HT enabled. This is on Ubuntu Ibex x64, I don't remember seeing this in Arch or Gentoo.

Here are what all the others report:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Core(TM) i7 CPU         920  @ 2.67GHz
stepping	: 4
cpu MHz		: 3799.977
cache size	: 8192 KB
physical id	: 0
siblings	: 8
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr sse4_1 sse4_2 popcnt lahf_lm
bogomips	: [b][color=green]7599.95[/b][/color]
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

And the odd one:

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Core(TM) i7 CPU         920  @ 2.67GHz
stepping	: 4
cpu MHz		: 3799.977
cache size	: 8192 KB
physical id	: 0
siblings	: 8
core id		: 2
cpu cores	: 4
apicid		: 4
initial apicid	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr sse4_1 sse4_2 popcnt lahf_lm
bogomips	: [b][color=red]11121.02[/b][/color]
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

 

[UmHelp]

Doesn't the bogomips calculation have something to do with how much nothing the processor can do in a given time?

I think that core is just lazy.

But really if you are talking about the bogomips it is in no way a performance metric for processors. If i remember correctly it has something to do with how the kernel does internal busy waiting.

 

[petteyg359]

On my laptop with a C2D T5800, I actually get different MHz readings from the cores. When power-saving is active, core 1 stays at the 800MHz minimum, and only core 0 jumps up to full speed.

 

[splat]

i always thought the bogomips displayed was simply mhz * 2. never seen cores have different bogomips displayed. core i7 can dynamicly change each core tho, right?