1. 00-INDEX
    2.     - this file
    3. highres.txt
    4.     - High resolution timers and dynamic ticks design notes
    5. hpet.txt
    6.     - High Precision Event Timer Driver for Linux
    7. hpet_example.c
    8.     - sample hpet timer test program
    9. hrtimers.txt
    10.     - subsystem for high-resolution kernel timers
    11. Makefile
    12.     - Build and link hpet_example
    13. NO_HZ.txt
    14.     - Summary of the different methods for the scheduler clock-interrupts management.
    15. timekeeping.txt
    16.     - Clock sources, clock events, sched_clock() and delay timer notes
    17. timers-howto.txt
    18.     - how to insert delays in the kernel the right (tm) way.
    19. timer_stats.txt
    20.     - 定时器使用统计