Auger

Generates a mock sky of ultra-high-energy cosmic rays as expected from the Auger Observatory, using a Monte Carlo simulation. Demonstrates an impressive 210x GPU speedup over a serial CPU implementation.

Dependencies: clRNG

main.c
├── defs.h       General libraries, including OpenCL
├── clbuild.c    For building kernel
└── cr.cl        Kernel
    └── exposure.clh  OpenCL header with helper function

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Usage

Build with CMake

clRNG must be installed and detectable. The example is silently skipped if clRNG is not found.

cmake -B build && cmake --build build
cd build/auger && ./augerOCL

Build with Makefile

cd auger && make run

Performance

Benchmark on: GPU — Intel HD Graphics 5300, 24 compute units, 900 MHz; CPU — Intel Core M-5Y51 @ 1.10 GHz, 4 cores.

Generating 5,000,000 cosmic rays:

Version	Time
Serial on CPU	4m 39.424s
Parallel on GPU	1.33s
Speedup	210x