87 lines
2.7 KiB
Rust
87 lines
2.7 KiB
Rust
use criterion::{black_box, criterion_group, criterion_main, Criterion};
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use euler::System;
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use sbp::operators::{SbpOperator2d, Upwind4, UpwindOperator2d, SBP4};
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use sbp::Float;
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fn advance_system<SBP: SbpOperator2d>(universe: &mut System<SBP>, n: usize) {
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for _ in 0..n {
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universe.advance(1.0 / 40.0 * 0.2);
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}
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}
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fn advance_system_upwind<UO: UpwindOperator2d>(universe: &mut System<UO>, n: usize) {
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for _ in 0..n {
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universe.advance_upwind(1.0 / 40.0 * 0.2);
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}
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}
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fn advance_embedded<UO: UpwindOperator2d>(universe: &mut System<UO>, embedded: bool) {
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let dt = 0.2 / std::cmp::max(universe.nx(), universe.ny()) as Float;
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let t = 1.0;
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if embedded {
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let mut dt = dt;
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universe.advance_adaptive(t, &mut dt, 1e-2);
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} else {
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for _ in 0..(t / dt).round() as isize {
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universe.advance_upwind(dt);
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}
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}
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}
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fn performance_benchmark(c: &mut Criterion) {
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let mut group = c.benchmark_group("EulerSystem");
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group.sample_size(25);
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let w = 40;
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let h = 26;
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let x = ndarray::Array1::linspace(-10.0, 10.0, w);
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let x = x.broadcast((h, w)).unwrap();
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let y = ndarray::Array1::linspace(-10.0, 10.0, h);
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let y = y.broadcast((w, h)).unwrap().reversed_axes();
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let mut universe = System::new(x.into_owned(), y.into_owned(), Upwind4);
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group.bench_function("advance", |b| {
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b.iter(|| {
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universe.init_with_vortex(0.0, 0.0);
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advance_system(&mut universe, black_box(20))
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})
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});
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let mut universe = System::new(x.into_owned(), y.into_owned(), Upwind4);
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group.bench_function("advance_upwind", |b| {
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b.iter(|| {
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universe.init_with_vortex(0.0, 0.0);
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advance_system_upwind(&mut universe, black_box(20))
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})
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});
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let mut universe = System::new(x.into_owned(), y.into_owned(), SBP4);
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group.bench_function("advance_trad4", |b| {
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b.iter(|| {
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universe.init_with_vortex(0.0, 0.0);
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advance_system(&mut universe, black_box(20))
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})
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});
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group.finish();
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let mut group = c.benchmark_group("adaptive integration");
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group.sample_size(10);
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let mut universe = System::new(x.into_owned(), y.into_owned(), Upwind4);
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group.bench_function("static dt", |b| {
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b.iter(|| {
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universe.init_with_vortex(0.0, 0.0);
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advance_embedded(&mut universe, false);
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})
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});
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group.bench_function("adaptive dt", |b| {
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b.iter(|| {
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universe.init_with_vortex(0.0, 0.0);
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advance_embedded(&mut universe, true);
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})
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});
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group.finish();
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}
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criterion_group!(benches, performance_benchmark);
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criterion_main!(benches);
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