intel-vtune-amd-uprof

You can identify CPU hotspots using Intel VTune or AMD uProf to collect a profile and generate a top-functions report. This reveals which functions consume the most CPU time and helps prioritize optimization efforts.

Roofline analysis maps achieved performance against hardware limits to determine if a kernel is compute-bound or memory-bound. You need it when optimizing scientific simulations to guide data-layout, vectorization, or algorithmic improvements.

Yes, Intel VTune Community Edition and AMD uProf support memory-access and microarchitecture-exploration analysis. They measure cache misses, DRAM bandwidth, NUMA effects, and pipeline stalls to determine why hotspots are slow.

Yes, CPU profiling requires builds with debug symbols to accurately map collected data to source functions. You also need access to Intel VTune or AMD uProf profiling tools installed on the target system.

The best way is to perform roofline analysis to measure achieved performance against hardware limits. This maps your kernel's performance to determine if it is compute-bound or memory-bound, guiding data-layout or vectorization changes.

High CPI indicates pipeline stalls or microarchitecture bottlenecks. Microarchitecture-exploration analysis investigates front-end and back-end bounds, speculation, and memory access patterns to determine why hotspots are slow.