Hardware Profiling Guide
Identify performance bottlenecks and optimize Intel-based systems using hardware profiling techniques.
Key Features
- System-wide performance monitoring with VTune Amplifier
- Real-time resource profiling (CPU, memory, GPU)
- Customizable sampling rates and filters
- Integration with Intel oneAPI toolkits
Getting Started
- Install Intel VTune Amplifier suite
- Launch GUI:
amplifier-gui - Choose "Sampling" profiling mode
- Configure target application in session settings
Performance Profiling Workflow
Use hierarchical sampling to identify bottlenecks:
#include <immintrin.h>
void profile_target() {
__m128i start, end;
start = _rdtsc();
// Insert code to profile
end = _rdtsc();
printf("Cycles: %" PRIu64"\n", _mm_cvtsi128_si64(end - start));
}
CPU Profiling
C-state analysis
Monitor P-state transitions with pmu_counters and thermal management registers.
Memory Profiling
L3 Cache
Analyze cache miss rates using perf_events_open() API