A/An ...process shares data with other executing processes

Reasons to support process cooperation:

Cooperating processes need an …mechanism to exchange data

fundamental mechanisms

IPC = Inter-Process Communication

Normally, the OS restricts a process to its own memory

managed by the OS

message passing Allow processes to communicate without sharing memory

A thread is a ... sequence of execution

A thread is the basic unit of CPU utilization

A traditional process has a …thread of control

A single-threaded process can perform

A multi-threaded process can perform multiple tasks at a time

A thread comprises a thread ID, a PC, a register set, and a stack

Process threads share

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