SYSTEM COMPONENTS

• OPERATING SYSTEM PROCESS MANAGEMENT=>In operating systems, process is defined as “A program in execution”. Process can be considered as an entity that consists of a number of elements, including: identifier, state, priority, program counter, memory pointer, context data, and I/O request. The above information about a process is usually stored in a data structure, typically called process block.
• MAIN MEMORY MANAGEMENT=>Memory management is the act of managing computer memory. In its simpler forms, this involves providing ways to allocate portions of memory to programs at their request, and freeing it for reuse when no longer needed. The management of main memory is critical to the computer system.Virtual memory systems separate the memory addresses used by a process from actual physical addresses, allowing separation of processes and increasing the effectively available amount of RAM using disk swapping. The quality of the virtual memory manager can have a big impact on overall system performance.Garbage collection is the automated allocation, and deallocation of computer memory resources for a program. This is generally implemented at the programming language level and is in opposition to manual memory management, the explicit allocation and deallocation of computer memory resources.
• SECONDARY STORAGE MANAGEMENT=>Since main memory (primary storage) is volatile and too small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory.Most modern computer systems use disks as the principle on-line storage medium, for both programs and data.The operating system is responsible for the following activities in connection with disk management:Free space managementStorage allocationDisk scheduling
• PROTECTION SYSTEM=>Protection System is rather anyware, i.e commercial software that applies extremely annoying ads to convince users of the need to buy it (buying Protection System means registering this program for at least one year period). We have to stress on that registering Protection System is no escape from its alerts as the hackers’ design is to get endless cashflow from user who once agreed to pay. That is, registered Protection System will ask for updates and extended registration. There is thus ho way to get rid of Protection System’s noisy ads but to remove Protection System entirely. to detect the infections harming your computer system and to remove Protection System automatically.
• COMMAND INTERPRETER SYSTEM=>A hardware accelerated I/O data processing engine to execute a minimum number of types of I/O data processing commands in response to a stimulus from a host computer. The data processing engine, referred to as a command interpreter includes a command queue, a logic unit, a multiple purpose interface, at least one memory, and a controlling state machine, that each operate in concert with each other and without software control. The types of commands executed by the command interpreter can include, but are not limited to, an Initialize, Copy, DMA Read, DMA Write, Cumulative Exclusive OR, Verify, Compare, and ECC Check. The execution of commands that specify a source data location and a destination data location are characterized by a plurality of reads to an internal cache from the source data location for each bulk write from the internal cache to the destination data location. The locations of the data operated on by the command interpreter include a local I/O controller memory and a non-local I/O controller memory accessible to the command interpreter by way of an I/O bus.