Struct taskctx::TimeStat

pub struct TimeStat { /* private fields */ }

任务时间统计结构

Implementations

impl TimeStat

pub fn new() -> Self

新建一个进程时需要初始化时间

pub fn output(&self) -> (usize, usize)

To get the time statistics

The format is (user time, kernel time) in nanoseconds

pub fn reset(&mut self, current_timestamp: usize)

复位时间统计器

pub fn switch_into_kernel_mode(&mut self, tid: isize, current_timestamp: usize)

从用户态进入内核态，记录当前时间戳，统计用户态时间

pub fn switch_into_user_mode(&mut self, tid: isize, current_timestamp: usize)

从内核态进入用户态，记录当前时间戳，统计内核态时间

pub fn swtich_from_old_task(&mut self, tid: isize, current_timestamp: usize)

内核态下，当前任务被切换掉，统计内核态时间

pub fn switch_to_new_task(&mut self, tid: isize, current_timestamp: usize)

内核态下，切换到当前任务，更新内核态时间戳

pub fn output_timer_as_us(&self) -> (usize, usize)

以微秒形式输出计时器信息

(计时器周期，当前计时器剩余时间)

pub fn set_timer( &mut self, timer_interval_ns: usize, timer_remained_ns: usize, timer_type: usize ) -> bool

设定计时器信息

若type不为None则返回成功

pub fn update_timer(&mut self, delta: usize, _tid: isize)

更新计时器，同时判断是否要发出信号

pub fn check_pending_timer_signal(&mut self) -> Option<usize>

Return

If the timer has triggered, return the signal number and reset the timer Otherwise, return None

Reference:

1. https://man7.org/linux/man-pages/man2/setitimer.2.html
2. https://github.com/bminor/musl/blob/master/arch/x86_64/bits/signal.h

Trait Implementations

impl Default for TimeStat

fn default() -> Self

Returns the “default value” for a type.