RTOS Kernel Architecture
For simpler applications, RTOS is usually a kernel but as complexity increases, various modules like networking protocol stacks debugging facilities, a device I/Os are includes in addition to the kernel.
RTOS architecture diagram
k (A) Kernel, RTOS kernel acts as an abstraction layer between the hardware and the applications. There are three broad categories of kernels
(i) Monolithic kernel
Monolithic kernels are part of Unix-like operating systems like Linux, F FreeBSD, etc. A monolithic kernel is one single program that contains all nine of the code necessary to perform each kernel connected task. It runs all basic system services (i. e. process and memory management; interrupt handling and Input /Output communication, file system, etc) and provides powerful abstraction§ of the Underlying hardware. Amount of context switches and electronic communication concerned area unit greatly reduced that makes it runs quicker than microkernel.
(iii) Hybrid Kernel
Hybrid kernels are extensions of microkernels with some properties of monolithic kernels. Hybrid kernels area unit is similar to’ microkernels, except that ‘ they include additional code in kernel space so that such code can run more swiftly than it would be it in user. space. These are a part of the operative systems like Microsoft Windows NGO, 2000 and XP DragonF 1y BSD, etc.