mirror/async-std
2
0
Fork 1
mirror of https://github.com/async-rs/async-std.git synced 2025-03-04 17:19:41 +00:00
Code Issues Releases Wiki Activity

Merge pull request #747 from async-rs/fix/scheduler-perf

Browse source 
Fix new scheduler loop
This commit is contained in:
Yoshua Wuyts 2020-04-09 17:26:46 +02:00 committed by GitHub
commit aebba2bd95
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
src/rt/runtime.rs
View file

@ -249,6 +249,8 @@ impl Machine {
continue;
}
let mut sched = rt.sched.lock().unwrap();
// One final check for available tasks while the scheduler is locked.
if let Some(task) = iter::repeat_with(|| self.find_task(rt))
.find(|s| !s.is_retry())
@ -258,19 +260,19 @@ impl Machine {
continue;
}
let mut sched = rt.sched.lock().unwrap();
// If another thread is already blocked on the reactor, there is no point in keeping
// the current thread around since there is too little work to do.
if sched.polling {
thread::sleep(Duration::from_micros(10));
continue;
break;
}
// Unlock the schedule poll the reactor until new I/O events arrive.
sched.polling = true;
drop(sched);
rt.reactor.poll(None).unwrap();
let mut sched = rt.sched.lock().unwrap();
// Lock the scheduler again and re-register the machine.
sched = rt.sched.lock().unwrap();
sched.polling = false;
runs = 0;