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TEST: Move benchmarks from parallel to main crate
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#![cfg(feature="rayon")] | ||
#![feature(test)] | ||
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extern crate rayon; | ||
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#[macro_use] | ||
extern crate ndarray; | ||
extern crate itertools; | ||
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use ndarray::prelude::*; | ||
use ndarray::parallel::prelude::*; | ||
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extern crate num_cpus; | ||
extern crate test; | ||
use test::Bencher; | ||
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use ndarray::Zip; | ||
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const EXP_N: usize = 256; | ||
const ADDN: usize = 512; | ||
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use std::cmp::max; | ||
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fn set_threads() { | ||
let n = max(1, num_cpus::get() / 2); | ||
//println!("Using {} threads", n); | ||
let _ = rayon::ThreadPoolBuilder::new().num_threads(n).build_global(); | ||
} | ||
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#[bench] | ||
fn map_exp_regular(bench: &mut Bencher) | ||
{ | ||
let mut a = Array2::<f64>::zeros((EXP_N, EXP_N)); | ||
a.swap_axes(0, 1); | ||
bench.iter(|| { | ||
a.mapv_inplace(|x| x.exp()); | ||
}); | ||
} | ||
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#[bench] | ||
fn rayon_exp_regular(bench: &mut Bencher) | ||
{ | ||
set_threads(); | ||
let mut a = Array2::<f64>::zeros((EXP_N, EXP_N)); | ||
a.swap_axes(0, 1); | ||
bench.iter(|| { | ||
a.view_mut().into_par_iter().for_each(|x| *x = x.exp()); | ||
}); | ||
} | ||
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const FASTEXP: usize = EXP_N; | ||
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#[inline] | ||
fn fastexp(x: f64) -> f64 { | ||
let x = 1. + x/1024.; | ||
x.powi(1024) | ||
} | ||
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#[bench] | ||
fn map_fastexp_regular(bench: &mut Bencher) | ||
{ | ||
let mut a = Array2::<f64>::zeros((FASTEXP, FASTEXP)); | ||
bench.iter(|| { | ||
a.mapv_inplace(|x| fastexp(x)) | ||
}); | ||
} | ||
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#[bench] | ||
fn rayon_fastexp_regular(bench: &mut Bencher) | ||
{ | ||
set_threads(); | ||
let mut a = Array2::<f64>::zeros((FASTEXP, FASTEXP)); | ||
bench.iter(|| { | ||
a.view_mut().into_par_iter().for_each(|x| *x = fastexp(*x)); | ||
}); | ||
} | ||
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#[bench] | ||
fn map_fastexp_cut(bench: &mut Bencher) | ||
{ | ||
let mut a = Array2::<f64>::zeros((FASTEXP, FASTEXP)); | ||
let mut a = a.slice_mut(s![.., ..-1]); | ||
bench.iter(|| { | ||
a.mapv_inplace(|x| fastexp(x)) | ||
}); | ||
} | ||
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#[bench] | ||
fn rayon_fastexp_cut(bench: &mut Bencher) | ||
{ | ||
set_threads(); | ||
let mut a = Array2::<f64>::zeros((FASTEXP, FASTEXP)); | ||
let mut a = a.slice_mut(s![.., ..-1]); | ||
bench.iter(|| { | ||
a.view_mut().into_par_iter().for_each(|x| *x = fastexp(*x)); | ||
}); | ||
} | ||
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#[bench] | ||
fn map_fastexp_by_axis(bench: &mut Bencher) | ||
{ | ||
let mut a = Array2::<f64>::zeros((FASTEXP, FASTEXP)); | ||
bench.iter(|| { | ||
for mut sheet in a.axis_iter_mut(Axis(0)) { | ||
sheet.mapv_inplace(fastexp) | ||
} | ||
}); | ||
} | ||
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#[bench] | ||
fn rayon_fastexp_by_axis(bench: &mut Bencher) | ||
{ | ||
set_threads(); | ||
let mut a = Array2::<f64>::zeros((FASTEXP, FASTEXP)); | ||
bench.iter(|| { | ||
a.axis_iter_mut(Axis(0)).into_par_iter() | ||
.for_each(|mut sheet| sheet.mapv_inplace(fastexp)); | ||
}); | ||
} | ||
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#[bench] | ||
fn rayon_fastexp_zip(bench: &mut Bencher) | ||
{ | ||
set_threads(); | ||
let mut a = Array2::<f64>::zeros((FASTEXP, FASTEXP)); | ||
bench.iter(|| { | ||
Zip::from(&mut a).into_par_iter().for_each(|(elt, )| *elt = fastexp(*elt)); | ||
}); | ||
} | ||
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#[bench] | ||
fn add(bench: &mut Bencher) | ||
{ | ||
let mut a = Array2::<f64>::zeros((ADDN, ADDN)); | ||
let b = Array2::<f64>::zeros((ADDN, ADDN)); | ||
let c = Array2::<f64>::zeros((ADDN, ADDN)); | ||
let d = Array2::<f64>::zeros((ADDN, ADDN)); | ||
bench.iter(|| { | ||
azip!(mut a, b, c, d in { | ||
*a += b.exp() + c.exp() + d.exp(); | ||
}); | ||
}); | ||
} | ||
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#[bench] | ||
fn rayon_add(bench: &mut Bencher) | ||
{ | ||
set_threads(); | ||
let mut a = Array2::<f64>::zeros((ADDN, ADDN)); | ||
let b = Array2::<f64>::zeros((ADDN, ADDN)); | ||
let c = Array2::<f64>::zeros((ADDN, ADDN)); | ||
let d = Array2::<f64>::zeros((ADDN, ADDN)); | ||
bench.iter(|| { | ||
par_azip!(mut a, b, c, d in { | ||
*a += b.exp() + c.exp() + d.exp(); | ||
}); | ||
}); | ||
} |