1 /*
2 Copyright (c) 2012, Intel Corporation
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are
7 met:
8
9 * Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11
12 * Redistributions in binary form must reproduce the above copyright
13 notice, this list of conditions and the following disclaimer in the
14 documentation and/or other materials provided with the distribution.
15
16 * Neither the name of Intel Corporation nor the names of its
17 contributors may be used to endorse or promote products derived from
18 this software without specific prior written permission.
19
20
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
22 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
24 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
25 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "../../common/timing.h"
35 #include "algorithm.h"
36 #include "matrix.h"
37 #include "util.h"
38 #include <cmath>
39
main(int argc,char ** argv)40 int main(int argc, char **argv) {
41 if (argc < 4) {
42 printf("usage: %s <input-matrix> <input-rhs> <output-file>\n", argv[0]);
43 return -1;
44 }
45
46 double gmres_cycles;
47
48 DEBUG_PRINT("Loading A...\n");
49 Matrix *A = CRSMatrix::matrix_from_mtf(argv[1]);
50 if (A == NULL)
51 return -1;
52 DEBUG_PRINT("... size: %lu\n", A->cols());
53
54 DEBUG_PRINT("Loading b...\n");
55 Vector *b = Vector::vector_from_mtf(argv[2]);
56 if (b == NULL)
57 return -1;
58
59 Vector x(A->cols());
60 DEBUG_PRINT("Beginning gmres...\n");
61 reset_and_start_timer();
62 gmres(*A, *b, x, A->cols() / 2, .01);
63 gmres_cycles = get_elapsed_mcycles();
64 // Write result out to file
65 x.to_mtf(argv[argc - 1]);
66
67 // Compute residual (double-check)
68 #ifdef DEBUG
69 Vector bprime(b->size());
70 A->multiply(x, bprime);
71 Vector resid(bprime.size(), &(bprime[0]));
72 resid.subtract(*b);
73 DEBUG_PRINT("residual error check: %lg\n", resid.norm() / b->norm());
74 #endif
75 // Print profiling results
76 DEBUG_PRINT("-- Total mcycles to solve : %.03f --\n", gmres_cycles);
77 }
78