Kernel

Kernel

1. MicroKernel

   • Kernel
     • Servers
       • Software
         • Embeed Systems/ Game consoles
           • Managment
             • Created
               • MAIN MEMORY Waiting
                 • MAIN MEMORY Running
                   • MAIN MEMORY Blocked
                     • VIRTUAL MEMORY Swapped out and blocked
                 • VIRTUAL MEMORY Swapped out and waiting
             • Terminated
   • Communication
     • Messages
   • Errors
     • Only Proccess
   • Performance
     • Slow, minimal features

2. Monolithic

   • Kernel
     • Software
       • Linux
         • PROCCESS MANAGMENT Pid
           • PROCESS SCHEDULING Use CFS
             • INTERRUPT HANDLING isr
               • SYSTEM CALLS functions returns value, success,/error
                 • TIMER 1000HZ
                   • MEMORY divides into blocks (pages)
                     • SYNCHRONIZATION Shared-Memory-Applications are applications using the same resources
       • FreeBSD
         • PROCCESS MANAGEMENT Every thread is a Process
           • PROCCESS SCHEDULING time-share scheduler
             • INTERRUPT HANDLING Mutex
               • TIMER 100HZ
                 • MEMORY use pages
                   • SYNCHRONIZATION uses look mechanisms and atomic operations
   • Communication
     • Services
       • System Calls
   • Errors
     • Affect hole system
   • Performance
     • FAST,processes the ability to call all functions directly like a program in user-space

3. Hybrid

   • Kernel/Servers
     • Software
       • Windows Vista
         • PROCCESS MANAGEMENT Each process has a virtual address space executable code
           • PROCCESS SCHEDULING schedule threads
             • INTERRUPT HANDLING IRQL
               • SYSTEM CALLS function of WINDOWS API
                 • TIMER 100HZ (66.6 multiprocessor)
                   • MEMORY depends of physics memory of computer
                     • SYNCHRONIZATION needs synchronization objects in order to access shared data
   • Performance
     • FAST, fast of monolithic with stability of microkernel