Disadvantages of embedded Operating system

Answer 1

Embedded operating system

An embedded operating system is an operating system for embedded computer systems. These operating systems are designed to be very compact and efficient, forsaking many functions that non-embedded computer operating systems provide, and which may not be used by the specialized applications they run. They are frequently also real-time operating systems.

Examples of embedded operating systems could include the software used in Automated Teller Machines, Cash Registers, CCTV systems, jukeboxes, etc.

Features of Embedded Operating System

1-Embedded systems are designed to do some specific task, rather than be a general-purpose computer for multiple tasks. Some also have real-time performance constraints that must be met, for reasons such as safety and usability; others may have low or no performance requirements, allowing the system hardware to be simplified to reduce costs.

2-Embedded systems are not always standalone devices. Many embedded systems consist of small, computerized parts within a larger device that serves a more general purpose. For example, the Gibson Robot Guitar features an embedded system for tuning the strings, but the overall purpose of the Robot Guitar is, of course, to play music similarly, an embedded system in an automobile provides a specific function as a subsystem of the car itself.

3-The program instructions written for embedded systems are referred to as firmware, and are stored in read-only memory or Flash memory chips. They run with limited computer hardware resources: little memory, small or non-existent keyboard and/or screen.

Common features

The following table provides an overview of the features common to HP thin clients based on operating system using the following legend

3. Feature is fully functional and operates the same as the desktop environment.

2. Feature is partially functional and does not operate the same as the desktop environment.

1. Feature is barely functional and requires a highly skilled administrator to enable it.

Answer 2

Disadvantages of embedded operating systemsSome projects require the power and versatility of high-end operating systems, but such systems also have substantial disadvantages:

• Increased complexity: Full-blown embedded operating systems are extremely complex. Unless you and your team already possess deep expertise in their use, you'll spend months gaining the necessary knowledge and experience.
• Boot time: In most embedded applications, boot time is a big issue. Without special programming, full-blown operating systems require 15 - 20 seconds to boot. You can improve that, but to do so requires an expert level of knowledge.
• Shut-down issues: What happens when power fails and the system is not shut down "gracefully"? Is shut-down time important to your application? If so, be aware that high-end operating systems require substantial time to shut down correctly. As with boot time, shut- down times can be reduced, but doing so requires substantial know-how.
• Test complexity: For an embedded test, all the permutations of the run-time environment must be identified and incorporated into the test suite. This is a huge job and it's rarely fully- accomplished, as is obvious whenever an embedded "system" crashes.

• Interface responsiveness: We have become used to our PC's having the occasional "hiccup," as one of its many background processes eats up processor cycles. However, if your microwave oven took varying times to respond to the "start" button, you'd probably think it was broken, or on its last legs. Embedded user interfaces need consistent response times and this is more difficult to achieve with a complex multitasking operating system

Answer 3

By Er. Nidhi Lal (Elex & Tell) Embedded operating system An embedded operating system is an operating system for embedded computer systems. These operating systems are designed to be very compact and efficient, forsaking many functions that non-embedded computer operating systems provide, and which may not be used by the specialized applications they run. They are frequently also real-time operating systems. Examples of embedded operating systems could include the software used in Automated Teller Machines, Cash Registers, CCTV systems, jukeboxes, etc. Features of Embedded Operating System 1-Embedded systems are designed to do some specific task, rather than be a general-purpose computer for multiple tasks. Some also have real-time performance constraints that must be met, for reasons such as safety and usability; others may have low or no performance requirements, allowing the system hardware to be simplified to reduce costs. 2-Embedded systems are not always standalone devices. Many embedded systems consist of small, computerized parts within a larger device that serves a more general purpose. For example, the Gibson Robot Guitar features an embedded system for tuning the strings, but the overall purpose of the Robot Guitar is, of course, to play music similarly, an embedded system in an automobile provides a specific function as a subsystem of the car itself. 3-The program instructions written for embedded systems are referred to as firmware, and are stored in read-only memory or Flash memory chips. They run with limited computer hardware resources: little memory, small or non-existent keyboard and/or screen. Common features The following table provides an overview of the features common to HP thin clients based on operating system using the following legend 3. Feature is fully functional and operates the same as the desktop environment. 2. Feature is partially functional and does not operate the same as the desktop environment. 1. Feature is barely functional and requires a highly skilled administrator to enable it.