Processes VS Threads

Threads are a part of a process, i.e. a process may contain one or more threads. but thread cannot contain process.

Process

• contains the program code and its current activity.
• has a self-contained execution environment.
• has a complete set of private basic run-time resources; each process has its own memory space
• To facilitate communication between the processes, most operating system use Inter processes Communication(IPC) resources, such as pipes and sockets.
• Run in separate memory spaces.

Thread

• excite even the smallest sequence of programmed instructions that can be manged independently by an operating system.
• threads are made of and exist within a process
• lightweight processes
• Threads can directly communicate with other threads of its process
• Run in shared memory spaces