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|
use bencher::Bencher;
use std::sync::Arc;
use tokio::{sync::Semaphore, task};
fn uncontended(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_multi_thread()
.worker_threads(6)
.build()
.unwrap();
let s = Arc::new(Semaphore::new(10));
b.iter(|| {
let s = s.clone();
rt.block_on(async move {
for _ in 0..6 {
let permit = s.acquire().await;
drop(permit);
}
})
});
}
async fn task(s: Arc<Semaphore>) {
let permit = s.acquire().await;
drop(permit);
}
fn uncontended_concurrent_multi(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_multi_thread()
.worker_threads(6)
.build()
.unwrap();
let s = Arc::new(Semaphore::new(10));
b.iter(|| {
let s = s.clone();
rt.block_on(async move {
let j = tokio::try_join! {
task::spawn(task(s.clone())),
task::spawn(task(s.clone())),
task::spawn(task(s.clone())),
task::spawn(task(s.clone())),
task::spawn(task(s.clone())),
task::spawn(task(s.clone()))
};
j.unwrap();
})
});
}
fn uncontended_concurrent_single(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_current_thread()
.build()
.unwrap();
let s = Arc::new(Semaphore::new(10));
b.iter(|| {
let s = s.clone();
rt.block_on(async move {
tokio::join! {
task(s.clone()),
task(s.clone()),
task(s.clone()),
task(s.clone()),
task(s.clone()),
task(s.clone())
};
})
});
}
fn contended_concurrent_multi(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_multi_thread()
.worker_threads(6)
.build()
.unwrap();
let s = Arc::new(Semaphore::new(5));
b.iter(|| {
let s = s.clone();
rt.block_on(async move {
let j = tokio::try_join! {
task::spawn(task(s.clone())),
task::spawn(task(s.clone())),
task::spawn(task(s.clone())),
task::spawn(task(s.clone())),
task::spawn(task(s.clone())),
task::spawn(task(s.clone()))
};
j.unwrap();
})
});
}
fn contended_concurrent_single(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_current_thread()
.build()
.unwrap();
let s = Arc::new(Semaphore::new(5));
b.iter(|| {
let s = s.clone();
rt.block_on(async move {
tokio::join! {
task(s.clone()),
task(s.clone()),
task(s.clone()),
task(s.clone()),
task(s.clone()),
task(s.clone())
};
})
});
}
bencher::benchmark_group!(
sync_semaphore,
uncontended,
uncontended_concurrent_multi,
uncontended_concurrent_single,
contended_concurrent_multi,
contended_concurrent_single
);
bencher::benchmark_main!(sync_semaphore);
|
