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|
use bencher::{black_box, Bencher};
use std::sync::Arc;
use tokio::{sync::RwLock, task};
fn read_uncontended(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_multi_thread()
.worker_threads(6)
.build()
.unwrap();
let lock = Arc::new(RwLock::new(()));
b.iter(|| {
let lock = lock.clone();
rt.block_on(async move {
for _ in 0..6 {
let read = lock.read().await;
black_box(read);
}
})
});
}
fn read_concurrent_uncontended_multi(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_multi_thread()
.worker_threads(6)
.build()
.unwrap();
async fn task(lock: Arc<RwLock<()>>) {
let read = lock.read().await;
black_box(read);
}
let lock = Arc::new(RwLock::new(()));
b.iter(|| {
let lock = lock.clone();
rt.block_on(async move {
let j = tokio::try_join! {
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone()))
};
j.unwrap();
})
});
}
fn read_concurrent_uncontended(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_current_thread()
.build()
.unwrap();
async fn task(lock: Arc<RwLock<()>>) {
let read = lock.read().await;
black_box(read);
}
let lock = Arc::new(RwLock::new(()));
b.iter(|| {
let lock = lock.clone();
rt.block_on(async move {
tokio::join! {
task(lock.clone()),
task(lock.clone()),
task(lock.clone()),
task(lock.clone()),
task(lock.clone()),
task(lock.clone())
};
})
});
}
fn read_concurrent_contended_multi(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_multi_thread()
.worker_threads(6)
.build()
.unwrap();
async fn task(lock: Arc<RwLock<()>>) {
let read = lock.read().await;
black_box(read);
}
let lock = Arc::new(RwLock::new(()));
b.iter(|| {
let lock = lock.clone();
rt.block_on(async move {
let write = lock.write().await;
let j = tokio::try_join! {
async move { drop(write); Ok(()) },
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone())),
task::spawn(task(lock.clone())),
};
j.unwrap();
})
});
}
fn read_concurrent_contended(b: &mut Bencher) {
let rt = tokio::runtime::Builder::new_current_thread()
.build()
.unwrap();
async fn task(lock: Arc<RwLock<()>>) {
let read = lock.read().await;
black_box(read);
}
let lock = Arc::new(RwLock::new(()));
b.iter(|| {
let lock = lock.clone();
rt.block_on(async move {
let write = lock.write().await;
tokio::join! {
async move { drop(write) },
task(lock.clone()),
task(lock.clone()),
task(lock.clone()),
task(lock.clone()),
task(lock.clone()),
};
})
});
}
bencher::benchmark_group!(
sync_rwlock,
read_uncontended,
read_concurrent_uncontended,
read_concurrent_uncontended_multi,
read_concurrent_contended,
read_concurrent_contended_multi
);
bencher::benchmark_main!(sync_rwlock);
|
