RTOS has unfair scheduling i.e scheduling is based on priority. GPOS has fair scheduling i.e it can be adjusted dynamically for optimized. well, in GPOS the code is not modular i.e. developer can not choose Kernel modules selectively. GPOSes are not scalable. but in the case of RTOS Kernel code. The main difference between GPOS and RTOS is that the RTOS should be deterministic. That is, the time consumed by the operating system to.

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If we go even beyond there are many many points to discuss, but it is not in the scope of this bftween. Previous story What are the different types of OS? Your email address will not be published. Previous post Next post.

What is the main difference between GPOS and RTOS?

In General, the more the number of threads the more time GPOS takes to schedule and start executing the the thread. It dump a betwedn to the processor.

Thanx guys,this article very helpfull, especially for beginners. So I am rewriting this post so that most of you can benefit.

Moreover, a preemptive kernel does not address other conditions that can impose unbounded latencies, such as the loss of priority information that occurs when a client invokes a driver or other system service d Priority Inversion Problem This is problem which can arrive in preemptive priority based scheduling. There is not short-cut for a good answer. Normally this ‘something’ is hardwired to processor with a line. In some cases the OS may decay the priority or dyanamically adjust of the thread in order to achive fairness.


This may cause jitters in RTOS env. In an RTOS the kernel is kept very simple and only very important service requests are kept within the kernel call. Those posts will tell more detailed concepts of RTOS. Most RTOS uses pre-emptive task scheduling method which is based on priority levels.

Difference between RTOS and GPOS.

Many Embedded interviewer ask this question. So from where other Latency Comes? A high priority process execution will get override only if a request comes from an even high priority process. Task Scheduling Lets take the case of beteeen scheduling first. Its all about money, if you can save even 25 cents on one embedded device hardware, and embedded devices are sold in millions of units say memory card Diffference can make millions of dollars.

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More appropriate answer would be ROTS are deterministic. A GPOS is made for high end, general purpose systems like a personal computer, a work station, a server system etc.

In between a high priority thread comes, If your kernel is non-preemptive until system call finishes your high priority thread would not get to execute. Notify me of new posts by email. But it gives no gaurntee that the high priroirty thread will be given preference to the lower priority one.


If kernel is preemptive you can determine the worst time where High rros thread would start execution. Posted by Techi at Where as a personal computer PC is not a time critical system.

What’s The Difference Between A RTOS And A GPOS?

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The more number of threads to schedule, latencies will get added up! It means, say temperature sensor says, initiate the cooling process. After a interrupt occurs following action are taken by OS a Interrupt intiated b A interrupt handler is found c Interrupt is handled d Makes the task runnable e Task is scheduled f Task, yeah dears actual RTOS goos runs here.

RTOS must handle this. Disable only current interrupt.

Discuss to Learn: Difference between RTOS and GPOS (General Purpose Operating Systems)

And most naive answer you could come up rtox is ‘ROTS are fast’. It is economical to port an RTOS to an embedded system of limited expectations and functionalities Example: The purpose of a PC is multiple. Where as in an RTOS — scheduling is always priority based. You may also like: