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// Copyright (c) 2017-2023, University of Tennessee. All rights reserved.
// SPDX-License-Identifier: BSD-3-Clause
// This program is free software: you can redistribute it and/or modify it under
// the terms of the BSD 3-Clause license. See the accompanying LICENSE file.
#include "test.hh"
#include "lapack.hh"
#include "lapack/device.hh"
#include "lapack/flops.hh"
#include "print_matrix.hh"
#include "error.hh"
#include "lapacke_wrappers.hh"
#include <vector>
// -----------------------------------------------------------------------------
template< typename scalar_t >
void test_getrf_device_work( Params& params, bool run )
{
using lapack::device_info_int;
using lapack::device_pivot_int;
using real_t = blas::real_type< scalar_t >;
// get & mark input values
int64_t m = params.dim.m();
int64_t n = params.dim.n();
int64_t device = params.device();
int64_t align = params.align();
int64_t verbose = params.verbose();
params.matrix.mark();
real_t eps = std::numeric_limits< real_t >::epsilon();
real_t tol = params.tol() * eps;
// mark non-standard output values
params.ref_time();
params.ref_gflops();
params.gflops();
if (! run)
return;
if (blas::get_device_count() == 0) {
params.msg() = "skipping: no GPU devices or no GPU support";
return;
}
// ---------- setup
int64_t lda = roundup( blas::max( 1, m ), align );
size_t size_A = (size_t) lda * n;
size_t size_ipiv = (size_t) blas::min( m, n );
std::vector< scalar_t > A_tst( size_A );
std::vector< scalar_t > A_ref( size_A );
std::vector< device_pivot_int > ipiv_tst( size_ipiv );
std::vector< int64_t > ipiv_tst_i64( size_ipiv );
std::vector< lapack_int > ipiv_ref( size_ipiv );
lapack::generate_matrix( params.matrix, m, n, &A_tst[0], lda );
A_ref = A_tst;
// Allocate and copy to GPU.
lapack::Queue queue( device );
scalar_t* dA_tst = blas::device_malloc< scalar_t >( size_A, queue );
device_pivot_int* d_ipiv = blas::device_malloc< device_pivot_int >( size_ipiv, queue );
device_info_int* d_info = blas::device_malloc< device_info_int >( 1, queue );
blas::device_copy_matrix( m, n, A_tst.data(), lda, dA_tst, lda, queue );
if (verbose >= 1) {
printf( "\n"
"A m=%5lld, n=%5lld, lda=%5lld\n",
llong( m ), llong( n ), llong( lda ) );
}
if (verbose >= 2) {
printf( "A = " ); print_matrix( m, n, &A_tst[0], lda );
}
// Allocate workspace
size_t d_size, h_size;
lapack::getrf_work_size_bytes( m, n, dA_tst, lda, &d_size, &h_size, queue );
char* d_work = blas::device_malloc< char >( d_size, queue );
std::vector<char> h_work_vector( h_size );
char* h_work = h_work_vector.data();
// test error exits
if (params.error_exit() == 'y') {
assert_throw( lapack::getrf( -1, n, dA_tst, lda, d_ipiv, d_work, d_size, h_work, h_size, d_info, queue ), lapack::Error );
assert_throw( lapack::getrf( m, -1, dA_tst, lda, d_ipiv, d_work, d_size, h_work, h_size, d_info, queue ), lapack::Error );
assert_throw( lapack::getrf( m, n, dA_tst, m-1, d_ipiv, d_work, d_size, h_work, h_size, d_info, queue ), lapack::Error );
}
// ---------- run test
testsweeper::flush_cache( params.cache() );
queue.sync();
double time = testsweeper::get_wtime();
lapack::getrf( m, n, dA_tst, lda, d_ipiv,
d_work, d_size, h_work, h_size, d_info, queue );
queue.sync();
time = testsweeper::get_wtime() - time;
params.time() = time;
double gflop = lapack::Gflop< scalar_t >::getrf( m, n );
params.gflops() = gflop / time;
// Copy result back to CPU.
device_info_int info_tst;
blas::device_copy_matrix( m, n, dA_tst, lda, A_tst.data(), lda, queue );
blas::device_memcpy( &info_tst, d_info, 1, queue );
blas::device_memcpy( &ipiv_tst[0], d_ipiv, size_ipiv, queue );
queue.sync();
if (info_tst != 0) {
fprintf( stderr, "lapack::getrf returned error %lld\n", llong( info_tst ) );
}
// Cleanup GPU memory.
blas::device_free( dA_tst, queue );
blas::device_free( d_ipiv, queue );
blas::device_free( d_info, queue );
blas::device_free( d_work, queue );
if (verbose >= 2) {
printf( "A_factor = " ); print_matrix( m, n, &A_tst[0], lda );
printf( "ipiv = [" );
for (size_t i = 0; i < size_ipiv; ++i) {
printf( " %3lld", llong( ipiv_tst[ i ] ) );
}
printf( "];\n" );
}
if (params.check() == 'y' && m == n) {
// ---------- check error
// Relative backwards error = ||b - Ax|| / (n * ||A|| * ||x||).
// For m != n, could check PA - LU.
int64_t nrhs = 1;
int64_t ldb = roundup( blas::max( 1, n ), align );
size_t size_B = (size_t) ldb * nrhs;
std::vector< scalar_t > B_tst( size_B );
std::vector< scalar_t > B_ref( size_B );
int64_t idist = 1;
int64_t iseed[4] = { 0, 1, 2, 3 };
lapack::larnv( idist, iseed, B_tst.size(), &B_tst[0] );
B_ref = B_tst;
std::copy( ipiv_tst.begin(), ipiv_tst.end(), ipiv_tst_i64.begin() );
info_tst = lapack::getrs(
lapack::Op::NoTrans, n, nrhs, &A_tst[0], lda, &ipiv_tst_i64[0], &B_tst[0], ldb );
if (info_tst != 0) {
fprintf( stderr, "lapack::getrs returned error %lld\n", llong( info_tst ) );
}
blas::gemm( blas::Layout::ColMajor, blas::Op::NoTrans, blas::Op::NoTrans,
n, nrhs, n,
-1.0, &A_ref[0], lda,
&B_tst[0], ldb,
1.0, &B_ref[0], ldb );
if (verbose >= 2) {
printf( "R = " ); print_matrix( n, nrhs, &B_ref[0], ldb );
}
real_t error = lapack::lange( lapack::Norm::One, n, nrhs, &B_ref[0], ldb );
real_t Xnorm = lapack::lange( lapack::Norm::One, n, nrhs, &B_tst[0], ldb );
real_t Anorm = lapack::lange( lapack::Norm::One, n, n, &A_ref[0], lda );
error /= (n * Anorm * Xnorm);
params.error() = error;
params.okay() = (error < tol);
}
if (params.ref() == 'y') {
// ---------- run reference
testsweeper::flush_cache( params.cache() );
time = testsweeper::get_wtime();
int64_t info_ref = LAPACKE_getrf( m, n, &A_ref[0], lda, &ipiv_ref[0] );
time = testsweeper::get_wtime() - time;
if (info_ref != 0) {
fprintf( stderr, "LAPACKE_getrf returned error %lld\n", llong( info_ref ) );
}
params.ref_time() = time;
params.ref_gflops() = gflop / time;
if (verbose >= 2) {
printf( "Aref_factor = " ); print_matrix( m, n, &A_ref[0], lda );
}
}
}
// -----------------------------------------------------------------------------
void test_getrf_device( Params& params, bool run )
{
switch (params.datatype()) {
case testsweeper::DataType::Single:
test_getrf_device_work< float >( params, run );
break;
case testsweeper::DataType::Double:
test_getrf_device_work< double >( params, run );
break;
case testsweeper::DataType::SingleComplex:
test_getrf_device_work< std::complex<float> >( params, run );
break;
case testsweeper::DataType::DoubleComplex:
test_getrf_device_work< std::complex<double> >( params, run );
break;
default:
throw std::runtime_error( "unknown datatype" );
break;
}
}
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