How to Test and Verify CPU Performance Post-Replacement

Testing and verifying CPU performance after replacement ensures that your HPC system is functioning optimally and reliably. Follow these structured steps:

Step 1: Initial System Checks

• Verify correct CPU detection:
• lscpu
• Confirm BIOS recognizes the new CPU properly.

Step 2: Run Basic Diagnostic Tests

1. Execute basic diagnostic tools like stress-ng or Prime95:

stress-ng --cpu <cores> --timeout 30m

Step 3: Benchmark Performance

• Use CPU benchmarking tools like Linpack or STREAM to assess performance:

mpirun -np <cores> ./xhpl

Step 4: Monitor CPU Stability and Temperatures

• Continuously monitor temperatures and power usage:

watch -n 1 sensors

Step 5: Evaluate Performance Results

• Compare benchmark results against previous data or expected performance standards.
• Ensure CPU temperatures and stability metrics remain within optimal thresholds.

Step 6: Document Results

• Record detailed test outcomes, performance metrics, and observations.

Step 7: Final System Validation

• Confirm system readiness for regular workloads.
• Continue monitoring periodically to ensure sustained performance.

Following these steps ensures that your newly replaced CPU meets performance expectations and maintains HPC system integrity.