This Computer Engineering Seminar Topic deals with the following:

RTOS    —   VxWorks
Abstract:
The VxWorks is the high performance real time operating system. Most widely used RTOS is the VxWorks. The operating system, which performs the proceeding in the real time instead of latter time with storing it in some memory. Development environment for this OS is Tornado, Wind River Systems Inc, US. This is scalable Operating system in which kernel, I/O system, network layer and all are in component nature and which are being used whenever required to add to Kernel. Modularity of this feature is one of the main advantage in development of real time applications.

Introduction
VxWorks is the real time operating system (RTOS) unlike other operating systems like windows, Linux etc. It is the multi tasking and single user operating system. RTOS is response even for external events. The main advantage of RTOS is less context switching time, accuracy and predictable response. Development environment for vxWorks is Tornado.VxWorks: A Partner in the Real-time Development CycleUNIX and Windows hosts are excellent systems for program development and for many interactive applications. However, they are not appropriate for real-time applications. On the other hand, traditional real-time operating systems provide poor environments for application development or for non-real-time components of an application, such as graphical user interfaces (GUIs).Rather than trying to create a single operating system that “does it all,” the Wind River philosophy is to utilize two complementary and cooperating operating systems (VxWorks and UNIX, or VxWorks and Windows) and let each do what it does best. VxWorks handles the critical real-time chores, while the host machine is used for program development and for applications that are not time-critical.

You can scale VxWorks to include exactly the feature combinations your application requires. During development, you can include additional features to speed your work (such as the networking facilities), then exclude them to save resources in the final version of your application.You can use the cross-development host machine to edit, compile, link, and store real-time code, but then run and debug that real-time code on VxWorks. The resulting VxWorks application can run standalone–either in ROM or disk-based–with no further need for the network or the host system. However, the host machine and VxWorks can also work together in a hybrid application, with the host machine using VxWorks systems as real-time “servers” in a networked environment. For instance, a VxWorks system controlling a robot might itself be controlled by a host machine that runs an expert system, or several VxWorks systems running factory equipment might be connected to host machines that track inventory or generate reports.

High-Performance Real-time Kernel Facilities
The VxWorks kernel, wind, includes multitasking with preemptive priority scheduling, intertask synchronization and communications facilities, interrupt handling support, watchdog timers, and memory management.

POSIX Compatibility
VxWorks provides most interfaces specified by the 1003.1b standard (formerly the 1003.4 standard), simplifying your ports from other conforming systems.

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