Emulator

What steps will reproduce the problem?

1. Run a game on a dual core computer
2. Limit the Dolphin process to only one core

What is the expected output? What do you see instead?
When the game run with the two cores, it takes 70~80% of the CPUs and the
game runs at 100% speed. Then, by disabling one of the two cores, Dolphin
takes 50% (or 100% of one cpu), but the game is still at 100% speed.
So, if the game needs 80% of two cpu to run at full speed, it should
decrease the speed when disabling one core.

What version of the product are you using? On what operating system?
Revision: r4771
CPU: Core 2 duo T6400
RAM: 4GB
GFX: ATI Mobility Radeon HD 3470

Please provide any additional information below.
I don't know if this is really an issue, but this is very strange.