Difference between Multiprogramming and
Multitasking
|
Multiprogramming
|
Multitasking
|
|
In Multiprogramming, at the same
time, we can run the multiple processes concurrently on one processor.
|
In Multitasking, at the same time,
we can execute multiple tasks by the use of multiple CPUs.
|
|
Multiprogramming is implemented
by using the concept of context switching
|
Multitasking is implemented by
using the concept of time-sharing.
|
|
In Multiprogramming, to execute the
processes, only one CPU is used.
|
In Multitasking, to allot a task
we need Multiple CPU’s.
|
|
Multiprogramming requires more
time to execute processes.
|
Multitasking requires less time
to execute processes.
|
|
The reason to use multiprogramming
is we can reduce the CPU ideal time.
|
The reason to use multitasking is
we can easily run multiple processes concurrently through time-sharing.
|
|
Multiprocessing is more
expensive.
|
Multitasking is less expensive.
|
Difference between Time-Sharing and Real-Time Operating System
|
Time-Sharing Operating System
|
Real-Time
Operating System
|
|
In
a time-sharing operating system, for a request, a fast response is
emphasized.
|
In
a real-time operating system, the task of computation is emphasized before
its nominative point.
|
|
Time-sharing
operating systems provide the switching method/function.
|
The real-time operating system does not give
the switching method/function.
|
|
In
a time-sharing operating system, there is a possibility of changes in the
program.
|
In
a Real-time operating system, there is no possibility of changes in the
program.
|
|
In
time-sharing, resources are shared externally.
|
In
a Real-time operating system, resources are not shared externally.
|
|
The time-sharing system can deal with more
processes and applications concurrently.
|
The
real-time operating system can only deal with one process and application at
a time.
|
|
In
this operating system, it is must that the user response is given within a
second.
|
In
this operating system, the response is given to the user within the time
constraint.
|
Difference between Multicore System and Multiprocessor System
|
Multicore System
|
Multiprocessor System
|
|
In
Multicore, a single program executes faster.
|
In
Multiprocessor, multiple programs can execute faster.
|
|
Multicore
is not reliable.
|
Multiprocessor
is reliable because if one CPU fails, then other CPU will not be affected.
|
|
In
Multicore, traffic is less.
|
In
Multiprocessor, traffic is more.
|
|
In
this type of system, there is only one CPU, and the multiple cores are
resides in that CPU.
|
In
this type of system, there are multiple CPUs.
|