Multi Tasking:
- Performing more than one task simultaneously.
- In computer, every instruction execute by the processor.
- Processor can execute only 1 instruction at a time.
- When we try to perform multi tasking, processor space will be shared among the tasks.
- Control UNIT of CPU performs multi tasking using
- Time slicing
- Context switching
- The processor control switches among the tasks to complete.
- Multi tasking is the concept of maximum utilization of CPU.
- Performing multi tasking is nothing but applying stress on processor to complete tasks parallel.
- Following diagram explains clearly how processor executes multiple tasks.
Task v/s Thread:
- Task is a Program(Process)
- Thread is a sub program(Sub process)
- To execute ‘n’ tasks, ‘n’ process spaces required.
- To execute ‘n’ threads, single process space is required.
- When we implement threading, that decreases the stress on the processor.
