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use print_duration::print_duration;
use std::{
convert::TryInto,
io::{stdout, Write},
sync::{
atomic::{AtomicBool, AtomicU64, AtomicU8, Ordering},
Arc, Mutex,
},
thread,
time::{Duration, Instant},
};
pub fn update_execution_position<const N: usize>(
i: usize,
execution_position_timer: Instant,
thread_execution_position: &Arc<AtomicU8>,
thread_execution_times: &Arc<[Mutex<(Duration, u64)>; N]>,
) -> Instant {
{
let mut data = thread_execution_times[i - 1].lock().unwrap();
data.0 += execution_position_timer.elapsed();
data.1 += 1;
}
thread_execution_position.store(i as u8, Ordering::SeqCst);
Instant::now()
}
pub struct Polling {
pub poll_rate: u64,
pub printing: bool,
pub early_exit_minimum: Option<f64>,
pub thread_execution_reporting: bool,
}
impl Polling {
const DEFAULT_POLL_RATE: u64 = 10;
pub fn new(printing: bool, early_exit_minimum: Option<f64>) -> Self {
Self {
poll_rate: Polling::DEFAULT_POLL_RATE,
printing,
early_exit_minimum,
thread_execution_reporting: false,
}
}
}
pub fn poll<const N: usize>(
data: Polling,
// Current count of each thread.
counters: Vec<Arc<AtomicU64>>,
offset: u64,
// Final total iterations.
iterations: u64,
// Best values of each thread.
thread_bests: Vec<Arc<Mutex<f64>>>,
// Early exit switch.
thread_exit: Arc<AtomicBool>,
// Current positions of execution of each thread.
thread_execution_positions: Vec<Arc<AtomicU8>>,
// Current average times between execution positions for each thread
thread_execution_times: Vec<Arc<[Mutex<(Duration, u64)>; N]>>,
) {
let start = Instant::now();
let mut stdout = stdout();
let mut count = offset
+ counters
.iter()
.map(|c| c.load(Ordering::SeqCst))
.sum::<u64>();
if data.printing {
println!("{:20}", iterations);
}
let mut poll_time = Instant::now();
let mut held_best: f64 = f64::MAX;
let mut held_average_execution_times: [(Duration, u64); N] =
vec![(Duration::new(0, 0), 0); N].try_into().unwrap();
let mut held_recent_execution_times: [Duration; N] =
vec![Duration::new(0, 0); N].try_into().unwrap();
while count < iterations {
if data.printing {
// loop {
let percent = count as f32 / iterations as f32;
// If count == 0, give 00... for remaining time as placeholder
let remaining_time_estimate = if count == 0 {
Duration::new(0, 0)
} else {
start.elapsed().div_f32(percent)
};
print!(
"\r{:20} ({:.2}%) {} / {} [{}] {}\t",
count,
100. * percent,
print_duration(start.elapsed(), 0..3),
print_duration(remaining_time_estimate, 0..3),
if held_best == f64::MAX {
String::from("?")
} else {
format!("{}", held_best)
},
if data.thread_execution_reporting {
let (average_execution_times, recent_execution_times): (
Vec<String>,
Vec<String>,
) = (0..thread_execution_times[0].len())
.map(|i| {
let (mut sum, mut num) = (Duration::new(0, 0), 0);
for n in 0..thread_execution_times.len() {
{
let mut data = thread_execution_times[n][i].lock().unwrap();
sum += data.0;
held_average_execution_times[i].0 += data.0;
num += data.1;
held_average_execution_times[i].1 += data.1;
*data = (Duration::new(0, 0), 0);
}
}
if num > 0 {
held_recent_execution_times[i] = sum.div_f64(num as f64);
}
(
if held_average_execution_times[i].1 > 0 {
format!(
"{:.1?}",
held_average_execution_times[i]
.0
.div_f64(held_average_execution_times[i].1 as f64)
)
} else {
String::from("?")
},
if held_recent_execution_times[i] > Duration::new(0, 0) {
format!("{:.1?}", held_recent_execution_times[i])
} else {
String::from("?")
},
)
})
.unzip();
let execution_positions: Vec<u8> = thread_execution_positions
.iter()
.map(|pos| pos.load(Ordering::SeqCst))
.collect();
format!(
"{{ [{}] [{}] {:.?} }}",
recent_execution_times.join(", "),
average_execution_times.join(", "),
execution_positions
)
} else {
String::from("")
}
);
stdout.flush().unwrap();
}
// Updates best and does early exiting
match (data.early_exit_minimum, data.printing) {
(Some(early_exit), true) => {
for thread_best in thread_bests.iter() {
let thread_best_temp = *thread_best.lock().unwrap();
if thread_best_temp < held_best {
held_best = thread_best_temp;
if thread_best_temp <= early_exit {
thread_exit.store(true, Ordering::SeqCst);
println!();
return;
}
}
}
}
(None, true) => {
for thread_best in thread_bests.iter() {
let thread_best_temp = *thread_best.lock().unwrap();
if thread_best_temp < held_best {
held_best = thread_best_temp;
}
}
}
(Some(early_exit), false) => {
for thread_best in thread_bests.iter() {
if *thread_best.lock().unwrap() <= early_exit {
thread_exit.store(true, Ordering::SeqCst);
return;
}
}
}
(None, false) => {}
}
thread::sleep(saturating_sub(
Duration::from_millis(data.poll_rate),
poll_time.elapsed(),
));
poll_time = Instant::now();
count = offset
+ counters
.iter()
.map(|c| c.load(Ordering::SeqCst))
.sum::<u64>();
}
if data.printing {
println!(
"\r{:20} (100.00%) {} / {} [{}] {}\t",
count,
print_duration(start.elapsed(), 0..3),
print_duration(start.elapsed(), 0..3),
held_best,
if data.thread_execution_reporting {
let (average_execution_times, recent_execution_times): (Vec<String>, Vec<String>) =
(0..thread_execution_times[0].len())
.map(|i| {
let (mut sum, mut num) = (Duration::new(0, 0), 0);
for n in 0..thread_execution_times.len() {
{
let mut data = thread_execution_times[n][i].lock().unwrap();
sum += data.0;
held_average_execution_times[i].0 += data.0;
num += data.1;
held_average_execution_times[i].1 += data.1;
*data = (Duration::new(0, 0), 0);
}
}
if num > 0 {
held_recent_execution_times[i] = sum.div_f64(num as f64);
}
(
if held_average_execution_times[i].1 > 0 {
format!(
"{:.1?}",
held_average_execution_times[i]
.0
.div_f64(held_average_execution_times[i].1 as f64)
)
} else {
String::from("?")
},
if held_recent_execution_times[i] > Duration::new(0, 0) {
format!("{:.1?}", held_recent_execution_times[i])
} else {
String::from("?")
},
)
})
.unzip();
let execution_positions: Vec<u8> = thread_execution_positions
.iter()
.map(|pos| pos.load(Ordering::SeqCst))
.collect();
format!(
"{{ [{}] [{}] {:.?} }}",
recent_execution_times.join(", "),
average_execution_times.join(", "),
execution_positions
)
} else {
String::from("")
}
);
stdout.flush().unwrap();
}
}
// Since `Duration::saturating_sub` is unstable this is an alternative.
fn saturating_sub(a: Duration, b: Duration) -> Duration {
if let Some(dur) = a.checked_sub(b) {
dur
} else {
Duration::new(0, 0)
}
}