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[acekiller]

Hi there. Recently I installed the latest CodeXL (v1.6.7247.0) and found that it can do power profiling, which is a good function for AMD APUs because APUs highlight energy efficiency. However, I have a little confusion on the power profiler's counter: the CPU Compute Unit 0 power and CPU Compute Unit 1 Power.

This is the power profiling results for teapot example. it only shows the CPU CU0 and CPU CU1 power. I also checked the documentation and found that they only provide CU0 and CU1 profiling. As I understand, each CPU core is a CU, why CU2 and CU3 are missing in this case? Or I understand no in a correct way? Thanks for any kind help.

[dorono]

Hi acekiller,

Your AMD APU contains 4 CPU Cores: Core 0, Core 1, Core 2 and Core 3. The cores are organized in pairs. Each pair is called a Compute Unit.

Thus:

• Compute Unit 0 = Core 0 + Core 1
• Compute Unit 1 = Core 2 + Core 3

CodeXL Power Profiler reports the average power consumption of the Compute Units. This data is not available individually for each core.

[acekiller]

Hi, dorono, thanks for your answer, that does help me a lot to make it more clear. ^_^