08time/time

   1 %Time Management
   2 %Thadeu Cascardo
   3
   4 # Tickes, Jiffies
   5
   6 * The timer ticks with a frequency, interrupting the system
   7 * Necessary for preemptive scheduling, using a time slice
   8 * Linux counts the number of ticks in the *jiffies* variable
   9 * It's interrupted *HZ* times in a second
  10
  11 # Busy waiting
  12
  13 * time\\_after
  14 * time\\_before
  15 * cpu\\_relax
  16 * udelay
  17
  18 # Scheduling
  19
  20 * schedule
  21 * set\\_current\\_state
  22 * TASK\\_INTERRUPTIBLE
  23 * TASK\\_UNINTERRUPTIBLE
  24 * TASK\\_RUNNING
  25 * schedule\\_timeout
  26 * schedule\\_timeout\\_interruptible
  27 * msleep
  28 * msleep\\_interruptible
  29
  30 # Timers
  31
  32 * linux/timer.h
  33 * struct timer\\_list
  34         - unsigned long expires
  35         - void function(unsigned long)
  36         - unsigned long data
  37 * init\\_timer
  38 * TIMER\\_INITIALIZER
  39 * add\\_timer
  40 * del\\_timer
  41 * mod\\_timer
  42 * del\\_timer\\_sync
  43
  44 # Work queues
  45
  46 # Delayed work
  47
  48 # Tasklets
  49
  50 # Wait queue
  51
  52 # Completion