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tests: delete the manual matrix-test

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This test program was useful a decade ago when weston_matrix_invert()
was being developed. It was a manual test program that ran for a certain
number of seconds and required human interpretation of numbers to see if
results were acceptable or not. Hence it was foundamentally unsuitable
for CI.

The way it generated random matrices for inversion testing was also very
naive, and it used the determinant value to determine invertability
which is completely bogus. This made it also a bad test for correctness.

Much better speed and correctness testing is implemented in

    https://gitlab.freedesktop.org/pq/fourbyfour

with documented testing procedures. It has a copy of the weston_matrix
implementation.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
dev
Pekka Paalanen 2 years ago committed by Pekka Paalanen
parent 62ab6891db
commit a1e5d46d91
2 changed files with 0 additions and 425 deletions
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  1. 424
      tests/matrix-test.c
  2. 1
      tests/meson.build

424
tests/matrix-test.c
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@ -1,424 +0,0 @@
/*
* Copyright © 2012 Collabora, Ltd.
*
* 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 (including the
* next paragraph) 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 "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <unistd.h>
#include <signal.h>
#include <time.h>
#include <libweston/matrix.h>
struct inverse_matrix {
double LU[16]; /* column-major */
unsigned perm[4]; /* permutation */
};
static struct timespec begin_time;
static void
reset_timer(void)
{
clock_gettime(CLOCK_MONOTONIC, &begin_time);
}
static double
read_timer(void)
{
struct timespec t;
clock_gettime(CLOCK_MONOTONIC, &t);
return (double)(t.tv_sec - begin_time.tv_sec) +
1e-9 * (t.tv_nsec - begin_time.tv_nsec);
}
static double
det3x3(const float *c0, const float *c1, const float *c2)
{
return (double)
c0[0] * c1[1] * c2[2] +
c1[0] * c2[1] * c0[2] +
c2[0] * c0[1] * c1[2] -
c0[2] * c1[1] * c2[0] -
c1[2] * c2[1] * c0[0] -
c2[2] * c0[1] * c1[0];
}
static double
determinant(const struct weston_matrix *m)
{
double det = 0;
#if 1
/* develop on last row */
det -= m->d[3 + 0 * 4] * det3x3(&m->d[4], &m->d[8], &m->d[12]);
det += m->d[3 + 1 * 4] * det3x3(&m->d[0], &m->d[8], &m->d[12]);
det -= m->d[3 + 2 * 4] * det3x3(&m->d[0], &m->d[4], &m->d[12]);
det += m->d[3 + 3 * 4] * det3x3(&m->d[0], &m->d[4], &m->d[8]);
#else
/* develop on first row */
det += m->d[0 + 0 * 4] * det3x3(&m->d[5], &m->d[9], &m->d[13]);
det -= m->d[0 + 1 * 4] * det3x3(&m->d[1], &m->d[9], &m->d[13]);
det += m->d[0 + 2 * 4] * det3x3(&m->d[1], &m->d[5], &m->d[13]);
det -= m->d[0 + 3 * 4] * det3x3(&m->d[1], &m->d[5], &m->d[9]);
#endif
return det;
}
static void
print_permutation_matrix(const struct inverse_matrix *m)
{
const unsigned *p = m->perm;
const char *row[4] = {
"1 0 0 0\n",
"0 1 0 0\n",
"0 0 1 0\n",
"0 0 0 1\n"
};
printf(" P =\n%s%s%s%s", row[p[0]], row[p[1]], row[p[2]], row[p[3]]);
}
static void
print_LU_decomposition(const struct inverse_matrix *m)
{
unsigned r, c;
printf(" L "
" U\n");
for (r = 0; r < 4; ++r) {
double v;
for (c = 0; c < 4; ++c) {
if (c < r)
v = m->LU[r + c * 4];
else if (c == r)
v = 1.0;
else
v = 0.0;
printf(" %12.6f", v);
}
printf(" | ");
for (c = 0; c < 4; ++c) {
if (c >= r)
v = m->LU[r + c * 4];
else
v = 0.0;
printf(" %12.6f", v);
}
printf("\n");
}
}
static void
print_inverse_data_matrix(const struct inverse_matrix *m)
{
unsigned r, c;
for (r = 0; r < 4; ++r) {
for (c = 0; c < 4; ++c)
printf(" %12.6f", m->LU[r + c * 4]);
printf("\n");
}
printf("permutation: ");
for (r = 0; r < 4; ++r)
printf(" %u", m->perm[r]);
printf("\n");
}
static void
print_matrix(const struct weston_matrix *m)
{
unsigned r, c;
for (r = 0; r < 4; ++r) {
for (c = 0; c < 4; ++c)
printf(" %14.6e", m->d[r + c * 4]);
printf("\n");
}
}
static double
frand(void)
{
double r = random();
return r / (double)(RAND_MAX / 2) - 1.0f;
}
static void
randomize_matrix(struct weston_matrix *m)
{
unsigned i;
for (i = 0; i < 16; ++i)
#if 1
m->d[i] = frand() * exp(10.0 * frand());
#else
m->d[i] = frand();
#endif
}
/* Take a matrix, compute inverse, multiply together
* and subtract the identity matrix to get the error matrix.
* Return the largest absolute value from the error matrix.
*/
static double
test_inverse(struct weston_matrix *m)
{
unsigned i;
struct inverse_matrix q;
double errsup = 0.0;
if (matrix_invert(q.LU, q.perm, m) != 0)
return INFINITY;
for (i = 0; i < 4; ++i)
inverse_transform(q.LU, q.perm, &m->d[i * 4]);
m->d[0] -= 1.0f;
m->d[5] -= 1.0f;
m->d[10] -= 1.0f;
m->d[15] -= 1.0f;
for (i = 0; i < 16; ++i) {
double err = fabs(m->d[i]);
if (err > errsup)
errsup = err;
}
return errsup;
}
enum {
TEST_OK,
TEST_NOT_INVERTIBLE_OK,
TEST_FAIL,
TEST_COUNT
};
static int
test(void)
{
struct weston_matrix m;
double det, errsup;
randomize_matrix(&m);
det = determinant(&m);
errsup = test_inverse(&m);
if (errsup < 1e-6)
return TEST_OK;
if (fabs(det) < 1e-5 && isinf(errsup))
return TEST_NOT_INVERTIBLE_OK;
printf("test fail, det: %g, error sup: %g\n", det, errsup);
return TEST_FAIL;
}
static int running;
static void
stopme(int n)
{
running = 0;
}
static void
test_loop_precision(void)
{
int counts[TEST_COUNT] = { 0 };
printf("\nRunning a test loop for 10 seconds...\n");
running = 1;
alarm(10);
while (running) {
counts[test()]++;
}
printf("tests: %d ok, %d not invertible but ok, %d failed.\n"
"Total: %d iterations.\n",
counts[TEST_OK], counts[TEST_NOT_INVERTIBLE_OK],
counts[TEST_FAIL],
counts[TEST_OK] + counts[TEST_NOT_INVERTIBLE_OK] +
counts[TEST_FAIL]);
}
static void __attribute__((noinline))
test_loop_speed_matrixvector(void)
{
struct weston_matrix m;
struct weston_vector v = { { 0.5, 0.5, 0.5, 1.0 } };
unsigned long count = 0;
double t;
printf("\nRunning 3 s test on weston_matrix_transform()...\n");
weston_matrix_init(&m);
running = 1;
alarm(3);
reset_timer();
while (running) {
weston_matrix_transform(&m, &v);
count++;
}
t = read_timer();
printf("%lu iterations in %f seconds, avg. %.1f ns/iter.\n",
count, t, 1e9 * t / count);
}
static void __attribute__((noinline))
test_loop_speed_inversetransform(void)
{
struct weston_matrix m;
struct inverse_matrix inv;
struct weston_vector v = { { 0.5, 0.5, 0.5, 1.0 } };
unsigned long count = 0;
double t;
printf("\nRunning 3 s test on inverse_transform()...\n");
weston_matrix_init(&m);
matrix_invert(inv.LU, inv.perm, &m);
running = 1;
alarm(3);
reset_timer();
while (running) {
inverse_transform(inv.LU, inv.perm, v.f);
count++;
}
t = read_timer();
printf("%lu iterations in %f seconds, avg. %.1f ns/iter.\n",
count, t, 1e9 * t / count);
}
static void __attribute__((noinline))
test_loop_speed_invert(void)
{
struct weston_matrix m;
struct inverse_matrix inv;
unsigned long count = 0;
double t;
printf("\nRunning 3 s test on matrix_invert()...\n");
weston_matrix_init(&m);
running = 1;
alarm(3);
reset_timer();
while (running) {
matrix_invert(inv.LU, inv.perm, &m);
count++;
}
t = read_timer();
printf("%lu iterations in %f seconds, avg. %.1f ns/iter.\n",
count, t, 1e9 * t / count);
}
static void __attribute__((noinline))
test_loop_speed_invert_explicit(void)
{
struct weston_matrix m;
unsigned long count = 0;
double t;
printf("\nRunning 3 s test on weston_matrix_invert()...\n");
weston_matrix_init(&m);
running = 1;
alarm(3);
reset_timer();
while (running) {
weston_matrix_invert(&m, &m);
count++;
}
t = read_timer();
printf("%lu iterations in %f seconds, avg. %.1f ns/iter.\n",
count, t, 1e9 * t / count);
}
int main(void)
{
struct sigaction ding;
struct weston_matrix M;
struct inverse_matrix Q;
int ret;
double errsup;
double det;
ding.sa_handler = stopme;
sigemptyset(&ding.sa_mask);
ding.sa_flags = 0;
sigaction(SIGALRM, &ding, NULL);
srandom(13);
M.d[0] = 3.0; M.d[4] = 17.0; M.d[8] = 10.0; M.d[12] = 0.0;
M.d[1] = 2.0; M.d[5] = 4.0; M.d[9] = -2.0; M.d[13] = 0.0;
M.d[2] = 6.0; M.d[6] = 18.0; M.d[10] = -12; M.d[14] = 0.0;
M.d[3] = 0.0; M.d[7] = 0.0; M.d[11] = 0.0; M.d[15] = 1.0;
ret = matrix_invert(Q.LU, Q.perm, &M);
printf("ret = %d\n", ret);
printf("det = %g\n\n", determinant(&M));
if (ret != 0)
return 1;
print_inverse_data_matrix(&Q);
printf("P * A = L * U\n");
print_permutation_matrix(&Q);
print_LU_decomposition(&Q);
printf("a random matrix:\n");
randomize_matrix(&M);
det = determinant(&M);
print_matrix(&M);
errsup = test_inverse(&M);
printf("\nThe matrix multiplied by its inverse, error:\n");
print_matrix(&M);
printf("max abs error: %g, original determinant %g\n", errsup, det);
test_loop_precision();
test_loop_speed_matrixvector();
test_loop_speed_inversetransform();
test_loop_speed_invert();
test_loop_speed_invert_explicit();
return 0;
}

1
tests/meson.build
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@ -251,7 +251,6 @@ endif
tests_standalone = [
['config-parser', [], [ dep_zucmain ]],
['matrix', [], [ dep_libm, dep_matrix_c ]],
['timespec', [], [ dep_zucmain ]],
['zuc',
[

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