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geo-ant 2022-10-21 08:51:41 +02:00 committed by Sébastien Crozet
parent daade1cf5e
commit a4e28a136e
2 changed files with 114 additions and 92 deletions
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77
src/base/par_iter.rs
View File

@ -1,15 +1,12 @@
//! this module implements parallelators to make matrices work with
//! the rayon crate seamlessly
use core::fmt::Debug;
use rayon::{
iter::plumbing::{bridge},
prelude::*,
};
use crate::{
iter::{ColumnIter, ColumnIterMut}, Dim, Matrix, MatrixSlice, MatrixSliceMut,
RawStorage, RawStorageMut, U1,
iter::{ColumnIter, ColumnIterMut},
Dim, Matrix, MatrixSlice, MatrixSliceMut, RawStorage, RawStorageMut, U1,
};
use core::fmt::Debug;
use rayon::{iter::plumbing::bridge, prelude::*};
/// A rayon parallel iterator over the colums of a matrix
pub struct ParColumnIter<'a, T, R: Dim, Cols: Dim, S: RawStorage<T, R, Cols>> {
@ -78,29 +75,42 @@ where
}
/// A rayon parallel iterator through the mutable columns of a matrix
pub struct ParColumnIterMut<'a,T,R:Dim ,Cols:Dim, S:RawStorage<T,R,Cols>+RawStorageMut<T,R,Cols>> {
mat : &'a mut Matrix<T,R,Cols,S>,
pub struct ParColumnIterMut<
'a,
T,
R: Dim,
Cols: Dim,
S: RawStorage<T, R, Cols> + RawStorageMut<T, R, Cols>,
> {
mat: &'a mut Matrix<T, R, Cols, S>,
}
impl<'a,T,R,Cols,S> ParColumnIterMut<'a,T,R,Cols,S>
where R: Dim, Cols : Dim, S:RawStorage<T,R,Cols> + RawStorageMut<T,R,Cols> {
impl<'a, T, R, Cols, S> ParColumnIterMut<'a, T, R, Cols, S>
where
R: Dim,
Cols: Dim,
S: RawStorage<T, R, Cols> + RawStorageMut<T, R, Cols>,
{
/// create a new parallel iterator for the given matrix
fn new(mat : &'a mut Matrix<T,R,Cols,S>) -> Self {
Self {
mat,
}
fn new(mat: &'a mut Matrix<T, R, Cols, S>) -> Self {
Self { mat }
}
}
impl<'a,T,R,Cols,S> ParallelIterator for ParColumnIterMut<'a,T,R,Cols,S>
where R: Dim, Cols : Dim, S:RawStorage<T,R,Cols> + RawStorageMut<T,R,Cols>,
T : Send + Sync + Debug + PartialEq + Clone + 'static,
S : Send + Sync {
impl<'a, T, R, Cols, S> ParallelIterator for ParColumnIterMut<'a, T, R, Cols, S>
where
R: Dim,
Cols: Dim,
S: RawStorage<T, R, Cols> + RawStorageMut<T, R, Cols>,
T: Send + Sync + Debug + PartialEq + Clone + 'static,
S: Send + Sync,
{
type Item = MatrixSliceMut<'a, T, R, U1, S::RStride, S::CStride>;
fn drive_unindexed<C>(self, consumer: C) -> C::Result
where
C: rayon::iter::plumbing::UnindexedConsumer<Self::Item> {
bridge(self,consumer)
where
C: rayon::iter::plumbing::UnindexedConsumer<Self::Item>,
{
bridge(self, consumer)
}
fn opt_len(&self) -> Option<usize> {
@ -108,26 +118,33 @@ S : Send + Sync {
}
}
impl<'a,T,R,Cols,S> IndexedParallelIterator for ParColumnIterMut<'a,T,R,Cols,S>
where R: Dim, Cols : Dim, S:RawStorage<T,R,Cols> + RawStorageMut<T,R,Cols>,
T : Send + Sync + Debug + PartialEq + Clone + 'static,
S : Send + Sync {
impl<'a, T, R, Cols, S> IndexedParallelIterator for ParColumnIterMut<'a, T, R, Cols, S>
where
R: Dim,
Cols: Dim,
S: RawStorage<T, R, Cols> + RawStorageMut<T, R, Cols>,
T: Send + Sync + Debug + PartialEq + Clone + 'static,
S: Send + Sync,
{
fn drive<C: rayon::iter::plumbing::Consumer<Self::Item>>(self, consumer: C) -> C::Result {
bridge(self,consumer)
bridge(self, consumer)
}
fn len(&self) -> usize {
self.mat.ncols()
}
fn with_producer<CB: rayon::iter::plumbing::ProducerCallback<Self::Item>>(self, callback: CB) -> CB::Output {
fn with_producer<CB: rayon::iter::plumbing::ProducerCallback<Self::Item>>(
self,
callback: CB,
) -> CB::Output {
let producer = ColumnIterMut::new(self.mat);
callback.callback(producer)
}
}
impl<'a, T, R: Dim, Cols: Dim, S: RawStorage<T, R, Cols> + RawStorageMut<T,R,Cols>> Matrix<T, R, Cols, S>
impl<'a, T, R: Dim, Cols: Dim, S: RawStorage<T, R, Cols> + RawStorageMut<T, R, Cols>>
Matrix<T, R, Cols, S>
where
T: Send + Sync + Clone + Debug + PartialEq + 'static,
S: Sync,

129
tests/core/matrix.rs
View File

@ -1141,111 +1141,116 @@ fn omatrix_to_string() {
fn column_iteration() {
// dynamic matrix
let dmat = nalgebra::dmatrix![
13,14,15;
23,24,25;
33,34,35;
];
13,14,15;
23,24,25;
33,34,35;
];
let mut col_iter = dmat.column_iter();
assert_eq!(col_iter.next(),Some(dmat.column(0)));
assert_eq!(col_iter.next(),Some(dmat.column(1)));
assert_eq!(col_iter.next(),Some(dmat.column(2)));
assert_eq!(col_iter.next(),None);
assert_eq!(col_iter.next(), Some(dmat.column(0)));
assert_eq!(col_iter.next(), Some(dmat.column(1)));
assert_eq!(col_iter.next(), Some(dmat.column(2)));
assert_eq!(col_iter.next(), None);
// statically sized matrix
let smat: nalgebra::SMatrix<f64, 2, 2> = nalgebra::matrix![1.0, 2.0; 3.0, 4.0];
let mut col_iter = smat.column_iter();
assert_eq!(col_iter.next(),Some(smat.column(0)));
assert_eq!(col_iter.next(),Some(smat.column(1)));
assert_eq!(col_iter.next(),None);
assert_eq!(col_iter.next(), Some(smat.column(0)));
assert_eq!(col_iter.next(), Some(smat.column(1)));
assert_eq!(col_iter.next(), None);
}
#[test]
fn column_iteration_mut() {
let mut dmat = nalgebra::dmatrix![
13,14,15;
23,24,25;
33,34,35;
];
13,14,15;
23,24,25;
33,34,35;
];
let mut cloned = dmat.clone();
let mut col_iter = dmat.column_iter_mut();
assert_eq!(col_iter.next(),Some(cloned.column_mut(0)));
assert_eq!(col_iter.next(),Some(cloned.column_mut(1)));
assert_eq!(col_iter.next(),Some(cloned.column_mut(2)));
assert_eq!(col_iter.next(),None);
assert_eq!(col_iter.next(), Some(cloned.column_mut(0)));
assert_eq!(col_iter.next(), Some(cloned.column_mut(1)));
assert_eq!(col_iter.next(), Some(cloned.column_mut(2)));
assert_eq!(col_iter.next(), None);
// statically sized matrix
let mut smat: nalgebra::SMatrix<f64, 2, 2> = nalgebra::matrix![1.0, 2.0; 3.0, 4.0];
let mut cloned = smat.clone();
let mut col_iter = smat.column_iter_mut();
assert_eq!(col_iter.next(),Some(cloned.column_mut(0)));
assert_eq!(col_iter.next(),Some(cloned.column_mut(1)));
assert_eq!(col_iter.next(),None);
assert_eq!(col_iter.next(), Some(cloned.column_mut(0)));
assert_eq!(col_iter.next(), Some(cloned.column_mut(1)));
assert_eq!(col_iter.next(), None);
}
#[test]
fn column_iteration_double_ended() {
let dmat = nalgebra::dmatrix![
13,14,15,16,17;
23,24,25,26,27;
33,34,35,36,37;
];
13,14,15,16,17;
23,24,25,26,27;
33,34,35,36,37;
];
let mut col_iter = dmat.column_iter();
assert_eq!(col_iter.next(),Some(dmat.column(0)));
assert_eq!(col_iter.next(),Some(dmat.column(1)));
assert_eq!(col_iter.next_back(),Some(dmat.column(4)));
assert_eq!(col_iter.next_back(),Some(dmat.column(3)));
assert_eq!(col_iter.next(),Some(dmat.column(2)));
assert_eq!(col_iter.next_back(),None);
assert_eq!(col_iter.next(),None);
assert_eq!(col_iter.next(), Some(dmat.column(0)));
assert_eq!(col_iter.next(), Some(dmat.column(1)));
assert_eq!(col_iter.next_back(), Some(dmat.column(4)));
assert_eq!(col_iter.next_back(), Some(dmat.column(3)));
assert_eq!(col_iter.next(), Some(dmat.column(2)));
assert_eq!(col_iter.next_back(), None);
assert_eq!(col_iter.next(), None);
}
#[test]
fn parallel_column_iteration() {
use nalgebra::dmatrix;
use rayon::prelude::*;
use nalgebra::{dmatrix,dvector};
let dmat : DMatrix<f64> = dmatrix![
13.,14.;
23.,24.;
33.,34.;
];
let dmat: DMatrix<f64> = dmatrix![
13.,14.;
23.,24.;
33.,34.;
];
let cloned = dmat.clone();
// test that correct columns are iterated over
dmat.par_column_iter().enumerate().for_each(|(idx,col)| {
assert_eq!(col,cloned.column(idx));
dmat.par_column_iter().enumerate().for_each(|(idx, col)| {
assert_eq!(col, cloned.column(idx));
});
// test that a more complex expression produces the same
// result as the serial equivalent
let par_result : f64 = dmat.par_column_iter().map(|col| col.norm()).sum();
let ser_result : f64= dmat.column_iter().map(|col| col.norm()).sum();
assert_eq!(par_result,ser_result);
let par_result: f64 = dmat.par_column_iter().map(|col| col.norm()).sum();
let ser_result: f64 = dmat.column_iter().map(|col| col.norm()).sum();
assert_eq!(par_result, ser_result);
}
#[test]
fn colum_iteration_mut_double_ended() {
let dmat = nalgebra::dmatrix![
13,14,15,16,17;
23,24,25,26,27;
33,34,35,36,37;
];
13,14,15,16,17;
23,24,25,26,27;
33,34,35,36,37;
];
let cloned = dmat.clone();
let mut col_iter = dmat.column_iter();
assert_eq!(col_iter.next(),Some(cloned.column(0)));
assert_eq!(col_iter.next(),Some(cloned.column(1)));
assert_eq!(col_iter.next_back(),Some(cloned.column(4)));
assert_eq!(col_iter.next_back(),Some(cloned.column(3)));
assert_eq!(col_iter.next(),Some(cloned.column(2)));
assert_eq!(col_iter.next_back(),None);
assert_eq!(col_iter.next(),None);
assert_eq!(col_iter.next(), Some(cloned.column(0)));
assert_eq!(col_iter.next(), Some(cloned.column(1)));
assert_eq!(col_iter.next_back(), Some(cloned.column(4)));
assert_eq!(col_iter.next_back(), Some(cloned.column(3)));
assert_eq!(col_iter.next(), Some(cloned.column(2)));
assert_eq!(col_iter.next_back(), None);
assert_eq!(col_iter.next(), None);
}
#[test]
fn parallel_column_iteration_mut() {
use rayon::prelude::*;
let mut first = DMatrix::<f32>::zeros(400,300);
let mut second = DMatrix::<f32>::zeros(400,300);
first.column_iter_mut().enumerate().for_each(|(idx,mut col)|col[idx]=1.);
second.par_column_iter_mut().enumerate().for_each(|(idx,mut col)| col[idx]=1.);
assert_eq!(first,second);
assert_eq!(second,DMatrix::identity(400,300));
let mut first = DMatrix::<f32>::zeros(400, 300);
let mut second = DMatrix::<f32>::zeros(400, 300);
first
.column_iter_mut()
.enumerate()
.for_each(|(idx, mut col)| col[idx] = 1.);
second
.par_column_iter_mut()
.enumerate()
.for_each(|(idx, mut col)| col[idx] = 1.);
assert_eq!(first, second);
assert_eq!(second, DMatrix::identity(400, 300));
}