README.md

OpenMP Hello World Examples

This directory contains five examples illustrating a simple "Hello World" program executed in different modes using OpenMP.

Examples

1. hello1: Runs on the CPU.
2. hello2: Runs in parallel on the CPU, distributed across threads.
3. hello3: Runs on the GPU.
4. hello4: Runs in parallel on the GPU, distributed across threads.
5. hello5: Runs in parallel on the GPU, distributed across teams and threads.

Prerequisites

• LLVM compiler with OpenMP support.
• A compatible GPU and the appropriate runtime environment.

Build Instructions

To build all examples, run:

make

This will generate the following binaries:

• hello1
• hello2
• hello3
• hello4
• hello5

Run Instructions

To execute all examples, use:

make run

This will run each binary and display the output for the respective example.

Example Outputs

• hello1: Prints a message from the CPU and checks if it is running on the initial device.
• hello2: Prints messages from multiple threads running in parallel on the CPU.
• hello3: Prints a message from the GPU and checks if it is running on the initial device.
• hello4: Prints messages from multiple threads running in parallel on the GPU.
• hello5: Prints messages from multiple threads and teams running in parallel on the GPU.

Cleanup

To clean up the generated files, run:

make clean

This will remove all binaries and intermediate files created during the build process.