High throughput is achieved by serving 5 low priority tasks than by serving a single high priority one. In such a case, some times execution of a high priority process will get delayed inorder to serve 5 or 6 low priority tasks. Here throughput means – the total number of processes that complete their execution per unit time. In the case of a GPOS – task scheduling is not based on “priority” always! GPOS is programmed to handle scheduling in such a way that it manages to achieve high throughput. Lets take the case of task scheduling first. Now lets get into differences in the working of GPOS and RTOS.Before going deep down, it will be good if you read this article from Howstuffworks- about Operating Systems. We can also say an RTOS is supposed to give quick and predictable response. You can read a good article about the basic concepts of an RTOS here:- What is Real Time Operating System. Example:- Windows, Linux, Unix etc.Īn RTOS is used for time critical systems. I hope you got the basic idea now!Ī GPOS is used for systems/applications that are not time critical. It may take several minutes (in some cases) depending upon the number of tasks and processes running in parallel. After pressing the SAVE button of a finished document, there is no particular time limit that the doc should be saved within 5 seconds. A user can run many applications at the same time. Where as a personal computer (PC) is not a time critical system. The card user will not wait 5 minutes at the ATM after he pressed the confirm button. 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. Example of a “time critical system” is – Automated Teller Machines (ATM). The basic difference of using a GPOS or an RTOS lies in the nature of the system – i.e whether the system is “time critical” or not! A system can be of a single purpose or multiple purpose.

Task manager priority high vs real time