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haoala

The image on the right shows 8 cores even though there are only 4 physical cores. There are 4 additional virtual cores due to Intel's hyperthreading technology, where each physical core counts for two logical cores.

woohoo

Red indicates CPU usage in kernel mode, and green is the sum of kernel-mode and user-mode execution.

Firephinx

Running nvvp on the Gates Machines opens up NVIDIA's Visual Profiler as long as you have X11 forwarding properly set up. It is very useful for visualizing the time spent in kernel functions and where you should focus your efforts on tuning your program.