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School/Analyse/Periode 2/Week 1.md
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@ -42,5 +42,19 @@ Were waiting a lot on IO time to finish, very inefficient. We can solve this usi
# Multitasking # Multitasking
To speed up computers we overlap CPU time and IO Time. To speed up computers we overlap CPU time and IO Time.
While a program waits for IO, o While a program waits for IO, other programs can use CPU. This solution requires multiple programs to be loaded into memory, hence the name multitasking.
Multitasking overlaps IO time of a program with CPU time of other program.
## Multitasking with multiple processors
If computer has a single CPU, programs should take turns in using it.
If computer has multiple CPUS, each task can be given a different CPU.
- If the number of tasks is more than available cpu's, we still take turns.
when program issues IO command, cpu is granted to the next program.