Linux Time 子系统文档索引
文档
| 文档 | 描述 | 源码位置 |
|---|---|---|
| time_overview.md | 时间体系总览：Clocksource、timekeeper、hrtimer、vDSO | kernel/time/ |
| time_subsystem.md | 时间子系统: tick, hrtimer, timekeeping, posix-timers | kernel/time/ |
| time_deep_dive_r1.md | 深度分析 R1: tick_device, timekeeper, NTP, hrtimer | kernel/time/ |
主要内容
1. 时间基础
- jiffies 和 HZ
- struct timespec / struct timeval
2. Tick 设备
- tick_handle_periodic()
- NO_HZ / Dynamic Tick
- struct tick_sched
3. 高精度定时器 (hrtimer)
- struct hrtimer
- hrtimer_start()
- hrtimer_cpu_base
4. Posix Timers
- timer_create()
- itimer
- clock_* syscall
5. Timekeeping
- struct tk_core
- struct timekeeper
- update_wall_time()
关键源码位置
| 组件 | 路径 |
|---|---|
| tick | kernel/time/tick-*.c |
| hrtimer | kernel/time/hrtimer.c |
| timekeeping | kernel/time/timekeeping.c |
| posix-timers | kernel/time/posix-timers.c |