New macbook pro retina 13 inch 2.9 i5 reports 4 cores?

[guyht]

Just got my new macbook pro retina 13 inch with 2.9GHz duel core intel i5, but its reporting that I have 4 cores:

% sysctl -n hw.ncpu
4

It also shows 4 cores in activity monitor and the load average is always around 4 - 5

Is the i5 actually quad core? What is going on here?
Thx

 

[T5BRICK]

The i5 and i7 processors used in the 13" rMBP are dual core with hyper threading.

 

[CaptainChunk]

Just got my new macbook pro retina 13 inch with 2.9GHz duel core intel i5, but its reporting that I have 4 cores:

% sysctl -n hw.ncpu
4

It also shows 4 cores in activity monitor and the load average is always around 4 - 5

Is the i5 actually quad core? What is going on here?
Thx

No. Mobile i5 CPUs support HyperThreading, so it's also reporting the two "virtual" cores. On a quad-core i7, it would report 8 total "cores".

 

[guyht]

ah, makes sense! thanks

 

[Mr. Retrofire]

Just got my new macbook pro retina 13 inch with 2.9GHz duel core intel i5, but its reporting that I have 4 cores:

% sysctl -n hw.ncpu
4

Please use

sudo sysctl -n hw.physicalcpu