From a990de90fe41456a23e58bd087d2f107d321f3a1 Mon Sep 17 00:00:00 2001 From: Valentin Popov Date: Fri, 19 Jul 2024 16:37:58 +0400 Subject: Deleted vendor folder --- vendor/once_cell/examples/bench_acquire.rs | 39 ------------------------------ 1 file changed, 39 deletions(-) delete mode 100644 vendor/once_cell/examples/bench_acquire.rs (limited to 'vendor/once_cell/examples/bench_acquire.rs') diff --git a/vendor/once_cell/examples/bench_acquire.rs b/vendor/once_cell/examples/bench_acquire.rs deleted file mode 100644 index 1518047..0000000 --- a/vendor/once_cell/examples/bench_acquire.rs +++ /dev/null @@ -1,39 +0,0 @@ -//! Benchmark the overhead that the synchronization of `OnceCell::get` causes. -//! We do some other operations that write to memory to get an imprecise but somewhat realistic -//! measurement. - -use once_cell::sync::OnceCell; -use std::sync::atomic::{AtomicUsize, Ordering}; - -const N_THREADS: usize = 16; -const N_ROUNDS: usize = 1_000_000; - -static CELL: OnceCell = OnceCell::new(); -static OTHER: AtomicUsize = AtomicUsize::new(0); - -fn main() { - let start = std::time::Instant::now(); - let threads = - (0..N_THREADS).map(|i| std::thread::spawn(move || thread_main(i))).collect::>(); - for thread in threads { - thread.join().unwrap(); - } - println!("{:?}", start.elapsed()); - println!("{:?}", OTHER.load(Ordering::Relaxed)); -} - -#[inline(never)] -fn thread_main(i: usize) { - // The operations we do here don't really matter, as long as we do multiple writes, and - // everything is messy enough to prevent the compiler from optimizing the loop away. - let mut data = [i; 128]; - let mut accum = 0usize; - for _ in 0..N_ROUNDS { - let _value = CELL.get_or_init(|| i + 1); - let k = OTHER.fetch_add(data[accum & 0x7F] as usize, Ordering::Relaxed); - for j in data.iter_mut() { - *j = (*j).wrapping_add(accum); - accum = accum.wrapping_add(k); - } - } -} -- cgit v1.2.3