Multiprocessing and Multiprogramming:
1. Definition of Multiprocessing and
Multiprogramming: Multiprocessing is a general term which means handling
numerous processes at once using multiple central processing units. On the
other hand Multiprogramming means to run instances from several programs at
same time using only one central processing unit.
2. Number of CPU Utilization:
Multiprocessing needs multiple CPUs to operate a task. But Multiprogramming
requires single CPU for all the operations.
3. Parallel Processing: Multiprocessing
authorizes parallel processing to handle corresponding processes
simultaneously. On the contrary, Multiprogramming depends on context switching
to instantaneously handle multiple programs. It can’t process multiple
processes concurrently rather it only processes one process at once and other
processes wait in the queue. And
when the current process is finished, the system start executing the next
process from the queue.
4. Processing time: Multiprocessing
requires a smaller amount to perform all the operations. But Multiprogramming
takes longer time to process all the tasks than multiprocessing.
5. Efficiency: Multiprocessing helps to
create smooth coordination between computer system and devices and eases the
working flow with proficiency. But Multiprogramming has lesser efficiency in
6. Cost: Generally, Multiprocessing
operating systems are a bit pricey than the other systems because of the
multiple number of processors. On the other hand, Multiprogramming operating
systems are much cheaper than Multiprogramming systems since each system has
only one processor.
7. Clock speed rate: The main objective to
build a Multiprocessing system is to perform tasks at higher clock speed rate.
But to perform Multiprogramming, a processor of medium to high clock speed rate
8. Performance: A Multiprocessing
operating system is built for the purpose of handling high speed mathematical
computations what a multiprogramming operating system cannot do.
9. Task Allocation: Multiprocessing
distributes multiple jobs to multiple processing unit so that the system can
execute tasks concurrently. But Multiprogramming cannot do the allocation
because of having only one processing unit.
10. Memory Sharing: In Multiprocessing
operating system, primary memory and peripherals can be shared by multiple
processors which immensely increases the memory reading writing speed. On the
other hand, only one processor can access the primary memory and peripherals in
Multiprogramming operating system.
11. Operating System: Multiprocessing is
applied in parallel operating systems whereas Multiprogramming is utilized in
batch operating systems.
12. Developers: Multiprocessing is related
to kernel designers. However, Multiprogramming is related to application designers.
13. Example: Now-a-days, most of the
computers are based on multiple processors. In market term, these systems are
called multi-cored system. Intel Core i3, Core i5, Core i7 etc. are the best
examples of multiprocessing system. Conversely, multiprogramming systems are
bit of old now because of lesser efficiency. They are called single-core
system. Intel Pentium 3, 4, Celeron etc. are the example of multiprogramming