I play Serious Sam 3 on Ubuntu 12.10 amd64 with AMD Phenom II X4 955 processor. And all time I play it there was fully loaded only one core. Command
mpstat 1 1500 -P ALL
after some time gives summary about idle-time percentage for each CPU:
CPU0 = 12.86%; CPU1 = 77.04%; CPU2 = 85.36%; CPU3 = 82.47%
Obviously, CPU0 was loaded more time. I repeat the test, and get nearly the same result
CPU0 = 13.73%; CPU1 = 80.37%; CPU2 = 85.72%; CPU3 = 83.10%
Any time I minimize game and look to CPU-load widget in KDE I see that CPU0 fully loaded.
Is there a way to fix this?