Operating system

• kernel space, user space
  • interact by system call (dual mode)
• interrupt
  • system call, I/O interrupt
• process
  • foreground process, background process
  • deamon, service
  • PCB
  • PID
  • context switching
• memory
  • code segment, text segment
  • data segment
    • global variable
  • heap segment
    • memory leakage
  • stack segment
    • dynamic assignment
• hierarchy architecture of process
  • new, ready, running, blocked, terminated
  • process state diagram
  • parent process, child process
    • PPID
  • fork, exec - system call
• thread

first draft: 2023.04.14 19:03