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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /third_party/rust/crossbeam-utils/benches
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/crossbeam-utils/benches')
-rw-r--r--third_party/rust/crossbeam-utils/benches/atomic_cell.rs156
1 files changed, 156 insertions, 0 deletions
diff --git a/third_party/rust/crossbeam-utils/benches/atomic_cell.rs b/third_party/rust/crossbeam-utils/benches/atomic_cell.rs
new file mode 100644
index 0000000000..844f7c02b6
--- /dev/null
+++ b/third_party/rust/crossbeam-utils/benches/atomic_cell.rs
@@ -0,0 +1,156 @@
+#![feature(test)]
+
+extern crate test;
+
+use std::sync::Barrier;
+
+use crossbeam_utils::atomic::AtomicCell;
+use crossbeam_utils::thread;
+
+#[bench]
+fn load_u8(b: &mut test::Bencher) {
+ let a = AtomicCell::new(0u8);
+ let mut sum = 0;
+ b.iter(|| sum += a.load());
+ test::black_box(sum);
+}
+
+#[bench]
+fn store_u8(b: &mut test::Bencher) {
+ let a = AtomicCell::new(0u8);
+ b.iter(|| a.store(1));
+}
+
+#[bench]
+fn fetch_add_u8(b: &mut test::Bencher) {
+ let a = AtomicCell::new(0u8);
+ b.iter(|| a.fetch_add(1));
+}
+
+#[bench]
+fn compare_exchange_u8(b: &mut test::Bencher) {
+ let a = AtomicCell::new(0u8);
+ let mut i = 0;
+ b.iter(|| {
+ let _ = a.compare_exchange(i, i.wrapping_add(1));
+ i = i.wrapping_add(1);
+ });
+}
+
+#[bench]
+fn concurrent_load_u8(b: &mut test::Bencher) {
+ const THREADS: usize = 2;
+ const STEPS: usize = 1_000_000;
+
+ let start = Barrier::new(THREADS + 1);
+ let end = Barrier::new(THREADS + 1);
+ let exit = AtomicCell::new(false);
+
+ let a = AtomicCell::new(0u8);
+
+ thread::scope(|scope| {
+ for _ in 0..THREADS {
+ scope.spawn(|_| loop {
+ start.wait();
+
+ let mut sum = 0;
+ for _ in 0..STEPS {
+ sum += a.load();
+ }
+ test::black_box(sum);
+
+ end.wait();
+ if exit.load() {
+ break;
+ }
+ });
+ }
+
+ start.wait();
+ end.wait();
+
+ b.iter(|| {
+ start.wait();
+ end.wait();
+ });
+
+ start.wait();
+ exit.store(true);
+ end.wait();
+ })
+ .unwrap();
+}
+
+#[bench]
+fn load_usize(b: &mut test::Bencher) {
+ let a = AtomicCell::new(0usize);
+ let mut sum = 0;
+ b.iter(|| sum += a.load());
+ test::black_box(sum);
+}
+
+#[bench]
+fn store_usize(b: &mut test::Bencher) {
+ let a = AtomicCell::new(0usize);
+ b.iter(|| a.store(1));
+}
+
+#[bench]
+fn fetch_add_usize(b: &mut test::Bencher) {
+ let a = AtomicCell::new(0usize);
+ b.iter(|| a.fetch_add(1));
+}
+
+#[bench]
+fn compare_exchange_usize(b: &mut test::Bencher) {
+ let a = AtomicCell::new(0usize);
+ let mut i = 0;
+ b.iter(|| {
+ let _ = a.compare_exchange(i, i.wrapping_add(1));
+ i = i.wrapping_add(1);
+ });
+}
+
+#[bench]
+fn concurrent_load_usize(b: &mut test::Bencher) {
+ const THREADS: usize = 2;
+ const STEPS: usize = 1_000_000;
+
+ let start = Barrier::new(THREADS + 1);
+ let end = Barrier::new(THREADS + 1);
+ let exit = AtomicCell::new(false);
+
+ let a = AtomicCell::new(0usize);
+
+ thread::scope(|scope| {
+ for _ in 0..THREADS {
+ scope.spawn(|_| loop {
+ start.wait();
+
+ let mut sum = 0;
+ for _ in 0..STEPS {
+ sum += a.load();
+ }
+ test::black_box(sum);
+
+ end.wait();
+ if exit.load() {
+ break;
+ }
+ });
+ }
+
+ start.wait();
+ end.wait();
+
+ b.iter(|| {
+ start.wait();
+ end.wait();
+ });
+
+ start.wait();
+ exit.store(true);
+ end.wait();
+ })
+ .unwrap();
+}