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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A system can be of a single purpose or multiple purpose. Here an ATM card user is supposed to get his money from the teller machine within 4 or 5 seconds from the moment he press the confirmation button.

The card user will not wait 5 minutes at the ATM after he pressed the confirm button. So an ATM is a time critical system. Where as a personal computer PC is not a time critical system. The purpose of a PC is multiple. A user can run many applications at the same time. After pressing the SAVE button of a finished document, there is no particular time limit that the doc should be saved within 5 seconds.

It may take several minutes in some cases depending upon the number of tasks and processes running in parallel. I hope you got ane basic idea now!


An RTOS is used for time critical systems. You can read a good wnd about the basic concepts of an RTOS here: We can also say an RTOS is supposed to give quick and predictable response.

Before going deep down, it will be good if you read this article from Howstuffworks- about Operating Systems. Lets take the case of task scheduling first. GPOS is programmed to handle scheduling in fifference a way that it manages to achieve high throughput. Here throughput means — the total number of processes that complete their execution per unit time. In such a case, some times execution of a high priority process will get delayed inorder to serve 5 or 6 low priority tasks.

High throughput is achieved by serving 5 low priority bftween than by serving a single high priority one. Where as in an RTOS — scheduling is always priority based. Most RTOS uses pre-emptive task scheduling method which is based on priority levels. Here a high dkfference process gets executed over the low priority ones.

A high priority process execution will get override only if a request comes from an even high priority process.

Knowledge Base: RTOS Vs GPOS

A GPOS is made for high end, general purpose systems like a personal computer, a work station, a server system etc. A GPOS being too heavy demands very high end hardware configurations. It is economical to port an RTOS to an embedded system of limited expectations and functionalities Example: The more number of threads to schedule, latencies will get added up! In an RTOS the kernel is kept very simple and only very important service requests are kept within the kernel call.


All other service requests are treated as external processes and threads. All such service requests from kernel are associated with a bounded latency in an RTOS.

Difference in a RTOS And a GPOS? | Root Level Technology

This ensures highly predictable and quick response from an RTOS. I have written this article from the perspective of an embedded system, which analyses which OS is better for an embedded system.

If we go bstween beyond there are many many points to discuss, but it is not in the scope of diference article. Some vendors have even introduced a dual kernel system — which has one kernel to serve for GPOS and another kernel to serve for real time systems. Your email address will not be published. Task Scheduling Lets take the case of task scheduling first. Previous post Next post. You may also like: Using inverters with AC generators.

What is difference between RTOS and GPOS?

I have got a unique information from this article. Nice article, really helpful. Thanx guys,this article very helpfull, especially for beginners.

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