Struct MixedPreconditionedCg 

pub struct MixedPreconditionedCg { /* private fields */ }

Mixed CPU/GPU preconditioned conjugate gradient solver.

The preconditioner (ILU(0)) runs entirely on CPU; SpMV is the hot path that would execute on GPU in a real deployment. In this pure-Rust implementation SpMV uses GpuPrecondCsr::spmv, which simulates the GPU compute path without an actual GPU dependency.

Implementations

impl MixedPreconditionedCg

pub fn new(a: &GpuPrecondCsr, max_iter: usize, tol: f64) -> SparseResult<Self>

Create a new solver, pre-computing ILU(0) from matrix a.

Errors

Propagates any error from Ilu0Preconditioner::compute.

pub fn solve( &self, a: &GpuPrecondCsr, b: &Array1<f64>, ) -> SparseResult<(Array1<f64>, usize)>

Solve Ax = b using preconditioned CG (Fletcher-Reeves with ILU(0)).

Returns (x, iterations_used).

Errors

Returns SparseError::ValueError if b.len() != a.nrows.