1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/* ************************************************************************
* Copyright (C) 2018-2022 Advanced Micro Devices, Inc. All rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* ************************************************************************ */
#include <cstdlib>
#include <iostream>
#include <rocalution/rocalution.hpp>
using namespace rocalution;
int main(int argc, char* argv[])
{
// Check command line parameters
if(argc == 1)
{
std::cerr << argv[0] << " <matrix> [Num threads]" << std::endl;
exit(1);
}
// Initialize rocALUTION
init_rocalution();
// Check command line parameters for number of OMP threads
if(argc > 2)
{
set_omp_threads_rocalution(atoi(argv[2]));
}
// Print rocALUTION info
info_rocalution();
// rocALUTION objects
LocalVector<double> x;
LocalVector<double> rhs;
LocalVector<double> e;
LocalMatrix<double> mat;
// Move objects to accelerator
mat.MoveToAccelerator();
x.MoveToAccelerator();
rhs.MoveToAccelerator();
e.MoveToAccelerator();
// Read matrix from MTX file
mat.ReadFileMTX(std::string(argv[1]));
// Allocate vectors
x.Allocate("x", mat.GetN());
rhs.Allocate("rhs", mat.GetM());
e.Allocate("e", mat.GetN());
// Initialize rhs such that A 1 = rhs
e.Ones();
mat.Apply(e, &rhs);
// Initial zero guess
x.Zeros();
// Start time measurement
double tick = rocalution_time();
// Linear Solver
CG<LocalMatrix<double>, LocalVector<double>, double> ls;
// AMG Preconditioner
SAAMG<LocalMatrix<double>, LocalVector<double>, double> p;
// Disable verbosity output of AMG preconditioner
p.Verbose(0);
// Set solver preconditioner
ls.SetPreconditioner(p);
// Set solver operator
ls.SetOperator(mat);
// Build solver
ls.Build();
// Compute 2 coarsest levels on the host
p.SetHostLevels(2);
// Stop time measurement
double tack = rocalution_time();
std::cout << "Building took: " << (tack - tick) / 1e6 << " sec" << std::endl;
// Print matrix info
mat.Info();
// Initialize solver tolerances
ls.Init(1e-8, 1e-8, 1e+8, 10000);
// Set verbosity output
ls.Verbose(1);
// Start time measurement
tick = rocalution_time();
// Solve A x = rhs
ls.Solve(rhs, &x);
// Stop time measurement
tack = rocalution_time();
std::cout << "Solver took: " << (tack - tick) / 1e6 << " sec" << std::endl;
// Clear solver
ls.Clear();
// Compute error L2 norm
e.ScaleAdd(-1.0, x);
double error = e.Norm();
std::cout << "||e - x||_2 = " << error << std::endl;
// Stop rocALUTION platform
stop_rocalution();
return 0;
}
|
