Thread creation has less overhead than process creation

Threads can run in parallel on a multiprocessor machine

Threads share the resources of the process

A blocked thread doesn’t block the process

Examine data to find dependencies between tasks

Divide data between tasks that run on separate cores

divide program into tasks that can run in parallel

Ensure that these tasks perform equal work of equal value

Testing a program with many execution paths

Distribution of tasks across multiple cores

Distribution of data across multiple cores

Threads

threads made by Operating System are called

threads made At the user level are called

User threads are managed with OS support

Kernel threads are supported and managed directly by the OS

Most modern OSs doesn’t support kernel threads (e.g., Windows, Linux)

Threads cannot run in parallel on multi-core systems

Multiple threads can run in parallel on multi-core systems

Multiple threads can access the kernel at a given time

Does not suffer from the drawback of the many-to-one model