paracodex-serial-cuda-analysis

name	paracodex-serial-cuda-analysis
description	ParaCodex prompt for serial to cuda analysis step.

Serial to CUDA Migration - Analysis Phase

Directory: {kernel_dir}/
Files: {file_listing}
Reference: Check Makefile in {kernel_dir}/

Task

Analyze Serial code in {source_dir}/ for migration to CUDA. produce {kernel_dir}/analysis.md. Copy source files to {kernel_dir}/.

Process

0. Setup

• Copy {file_listing} from {source_dir} to {kernel_dir}.

1. Identify Hotspots

• Run the code, time it.
• Identify Loop/Function taking most time.
• Distinguish hotspot kernel time from end-to-end runtime, including setup and data movement.
• If several helper functions form one timed pipeline, treat that pipeline as the optimization target.

2. Check Parallelizability

Reference: references/examples.md.

• Dependencies: Loop carried? (Hard).
• Independent: (Easy).
• Reduction: (Medium).
• Structural fit: Does the hotspot need a fused CUDA kernel rather than a direct helper-by-helper translation?
• Check whether the default run size is too small to expose real transfer, launch, or occupancy behavior.
• Mark the hotspot as small-input sensitive only when tiny-run conclusions are likely to mislead the migration.
• Read system_info_summary.txt and recommend a larger profiling size using the actual device memory and compute capability; prefer the largest short-run, memory-safe input that should load the GPU meaningfully.
• If that larger size still leaves the GPU weakly utilized or mostly launch/setup bound, mark it insufficient and recommend pushing higher within the practical budget.

3. Output Report

Reference: references/output.md (Use template).

• Fill "Hotspot Analysis".
• Fill "Migration Strategy".
• Fill "Structural Risk".
• Fill "Scalability Check".
• Estimate Speedup: (Potential).

Constraints

• No git commands.