How do I identify physical cores vs logical?

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Honorable
Jul 25, 2013
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cpu.jpg


I have an intel i3220 3.3 Ghz that has 2 physical cores and hyper threading. This image is from my resource monitor. I want to know how to tell which ones are the physical cores so I can play around with the CPU affinity in RadeonPro to see what works best.

cpu2.jpg


 
Solution
Sn1992-1361850
The best way to do it is just to benchmark it.

Write any trivial program that uses 2 threads. Then bind the threads to two cores. If the performance drops significantly between a pair of cores versus another pair, then you know those two cores are on the same physical core.

I would trust a benchmark like this over whatever anything else tells you.

In Windows, the logical/physical cores are interleaved. Cores 0,1 are on the same physical core. Cores 2,3 are on the same... Cores 4,5 are on the same... etc...
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Sn1992-1361850

Sn1992-1361850

Dignified
Jul 13, 2013
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The best way to do it is just to benchmark it.

Write any trivial program that uses 2 threads. Then bind the threads to two cores. If the performance drops significantly between a pair of cores versus another pair, then you know those two cores are on the same physical core.

I would trust a benchmark like this over whatever anything else tells you.

In Windows, the logical/physical cores are interleaved. Cores 0,1 are on the same physical core. Cores 2,3 are on the same... Cores 4,5 are on the same... etc...
 
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