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stress-matrix.c
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stress-matrix.c
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/*
* Copyright (C) 2013-2021 Canonical, Ltd.
* Copyright (C) 2022-2024 Colin Ian King.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "stress-ng.h"
#include "core-builtin.h"
#include "core-pragma.h"
#include "core-put.h"
#include "core-target-clones.h"
#define MIN_MATRIX_SIZE (16)
#define MAX_MATRIX_SIZE (8192)
#define DEFAULT_MATRIX_SIZE (128)
static const stress_help_t help[] = {
{ NULL, "matrix N", "start N workers exercising matrix operations" },
{ NULL, "matrix-method M", "specify matrix stress method M, default is all" },
{ NULL, "matrix-ops N", "stop after N maxtrix bogo operations" },
{ NULL, "matrix-size N", "specify the size of the N x N matrix" },
{ NULL, "matrix-yx", "matrix operation is y by x instead of x by y" },
{ NULL, NULL, NULL }
};
#if defined(HAVE_VLA_ARG)
typedef float stress_matrix_type_t;
/*
* the matrix stress test has different classes of maxtrix stressor
*/
typedef void (*stress_matrix_func_t)(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n]);
typedef struct {
const char *name; /* human readable form of stressor */
const stress_matrix_func_t func[2]; /* method functions, x by y, y by x */
} stress_matrix_method_info_t;
static const char *current_method = NULL; /* current matrix method */
static size_t method_all_index; /* all method index */
static const stress_matrix_method_info_t matrix_methods[];
/*
* stress_matrix_xy_prod()
* matrix product
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_prod(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
size_t i;
for (i = 0; i < n; i++) {
register size_t j;
for (j = 0; j < n; j++) {
register size_t k;
PRAGMA_UNROLL_N(8)
for (k = 0; k < n; k++) {
r[i][j] += a[i][k] * b[k][j];
}
}
}
}
/*
* stress_matrix_yx_prod()
* matrix product
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_prod(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
size_t j;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
register size_t k;
for (k = 0; k < n; k++) {
r[i][j] += a[i][k] * b[k][j];
}
}
}
}
/*
* stress_matrix_xy_add()
* matrix addition
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_add(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = a[i][j] + b[i][j];
}
}
}
/*
* stress_matrix_yx_add()
* matrix addition
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_add(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = a[i][j] + b[i][j];
}
}
}
/*
* stress_matrix_xy_sub()
* matrix subtraction
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_sub(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = a[i][j] - b[i][j];
}
}
}
/*
* stress_matrix_xy_sub()
* matrix subtraction
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_sub(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = a[i][j] - b[i][j];
}
}
}
/*
* stress_matrix_trans()
* matrix transpose
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_trans(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n], /* Ignored */
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = a[j][i];
}
}
}
/*
* stress_matrix_trans()
* matrix transpose
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_trans(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n], /* Ignored */
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
(void)b;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = a[j][i];
}
}
}
/*
* stress_matrix_mult()
* matrix scalar multiply
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_mult(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
stress_matrix_type_t v = b[0][0];
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = v * a[i][j];
}
}
}
/*
* stress_matrix_mult()
* matrix scalar multiply
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_mult(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
stress_matrix_type_t v = b[0][0];
(void)b;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = v * a[i][j];
}
}
}
/*
* stress_matrix_div()
* matrix scalar divide
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_div(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
stress_matrix_type_t v = b[0][0];
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = a[i][j] / v;
}
}
}
/*
* stress_matrix_div()
* matrix scalar divide
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_div(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
stress_matrix_type_t v = b[0][0];
(void)b;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = a[i][j] / v;
}
}
}
/*
* stress_matrix_hadamard()
* matrix hadamard product
* (A o B)ij = AijBij
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_hadamard(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = a[i][j] * b[i][j];
}
}
}
/*
* stress_matrix_hadamard()
* matrix hadamard product
* (A o B)ij = AijBij
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_hadamard(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = a[i][j] * b[i][j];
}
}
}
/*
* stress_matrix_frobenius()
* matrix frobenius product
* A : B = Sum(AijBij)
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_frobenius(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
stress_matrix_type_t sum = 0.0;
(void)r;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
sum += a[i][j] * b[i][j];
}
}
stress_float_put((float)sum);
}
/*
* stress_matrix_frobenius()
* matrix frobenius product
* A : B = Sum(AijBij)
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_frobenius(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
stress_matrix_type_t sum = 0.0;
(void)r;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
sum += a[i][j] * b[i][j];
}
}
stress_float_put((float)sum);
}
/*
* stress_matrix_copy()
* naive matrix copy, r = a
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_copy(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
/* unrolling does not help, the following turns into a memcpy */
for (j = 0; j < n; j++) {
r[i][j] = a[i][j];
}
}
}
/*
* stress_matrix_copy()
* naive matrix copy, r = a
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_copy(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
(void)b;
for (j = 0; j < n; j++) {
register size_t i;
/* unrolling does not help, the following turns into a memcpy */
for (i = 0; i < n; i++) {
r[i][j] = a[i][j];
}
}
}
/*
* stress_matrix_mean(void)
* arithmetic mean
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_mean(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = (a[i][j] + b[i][j]) / (stress_matrix_type_t)2.0;
}
}
}
/*
* stress_matrix_mean(void)
* arithmetic mean
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_mean(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = (a[i][j] + b[i][j]) / (stress_matrix_type_t)2.0;
}
}
}
/*
* stress_matrix_zero()
* simply zero the result matrix
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_zero(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
(void)a;
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
/* unrolling does not help, the following turns into a memset */
for (j = 0; j < n; j++) {
r[i][j] = 0.0;
}
}
}
/*
* stress_matrix_zero()
* simply zero the result matrix
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_zero(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
(void)a;
(void)b;
for (j = 0; j < n; j++) {
register size_t i;
/* unrolling does not help, the following turns into a memset */
for (i = 0; i < n; i++) {
r[i][j] = 0.0;
}
}
}
/*
* stress_matrix_negate()
* simply negate the matrix a and put result in r
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_negate(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
(void)a;
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = -a[i][j];
}
}
}
/*
* stress_matrix_negate()
* simply negate the matrix a and put result in r
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_negate(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
(void)a;
(void)b;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = -a[i][j];
}
}
}
/*
* stress_matrix_identity()
* set r to the identity matrix
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_identity(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t i;
(void)a;
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
PRAGMA_UNROLL_N(8)
for (j = 0; j < n; j++) {
r[i][j] = (i == j) ? 1.0 : 0.0;
}
}
}
/*
* stress_matrix_identity()
* set r to the identity matrix
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_identity(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
register size_t j;
(void)a;
(void)b;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
r[i][j] = (i == j) ? 1.0 : 0.0;
}
}
}
/*
* stress_matrix_xy_square()
* matrix square, r = a x a
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_xy_square(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
size_t i;
(void)b;
for (i = 0; i < n; i++) {
register size_t j;
for (j = 0; j < n; j++) {
register size_t k;
PRAGMA_UNROLL_N(8)
for (k = 0; k < n; k++) {
r[i][j] += a[i][k] * a[k][j];
}
}
}
}
/*
* stress_matrix_yx_square()
* matrix square, r = a x a
*/
static void OPTIMIZE3 TARGET_CLONES stress_matrix_yx_square(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
size_t j;
(void)b;
for (j = 0; j < n; j++) {
register size_t i;
for (i = 0; i < n; i++) {
register size_t k;
for (k = 0; k < n; k++) {
r[i][j] += a[i][k] * a[k][j];
}
}
}
}
/*
* stress_matrix_xy_all()
* iterate over all matrix stressors
*/
static void stress_matrix_xy_all(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n]);
/*
* stress_matrix_yx_all()
* iterate over all matrix stressors
*/
static void OPTIMIZE3 stress_matrix_yx_all(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n]);
/*
* Table of matrix stress methods, ordered x by y and y by x
*/
static const stress_matrix_method_info_t matrix_methods[] = {
{ "all", { stress_matrix_xy_all, stress_matrix_yx_all } },/* Special "all" test */
{ "add", { stress_matrix_xy_add, stress_matrix_yx_add } },
{ "copy", { stress_matrix_xy_copy, stress_matrix_yx_copy } },
{ "div", { stress_matrix_xy_div, stress_matrix_yx_div } },
{ "frobenius", { stress_matrix_xy_frobenius, stress_matrix_yx_frobenius } },
{ "hadamard", { stress_matrix_xy_hadamard, stress_matrix_yx_hadamard } },
{ "identity", { stress_matrix_xy_identity, stress_matrix_yx_identity } },
{ "mean", { stress_matrix_xy_mean, stress_matrix_yx_mean } },
{ "mult", { stress_matrix_xy_mult, stress_matrix_yx_mult } },
{ "negate", { stress_matrix_xy_negate, stress_matrix_yx_negate } },
{ "prod", { stress_matrix_xy_prod, stress_matrix_yx_prod } },
{ "sub", { stress_matrix_xy_sub, stress_matrix_yx_sub } },
{ "square", { stress_matrix_xy_square, stress_matrix_yx_square } },
{ "trans", { stress_matrix_xy_trans, stress_matrix_yx_trans } },
{ "zero", { stress_matrix_xy_zero, stress_matrix_yx_zero } },
};
static stress_metrics_t matrix_metrics[SIZEOF_ARRAY(matrix_methods)];
/*
* stress_matrix_xy_all()
* iterate over all matrix stressors
*/
static void OPTIMIZE3 stress_matrix_xy_all(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
double t;
current_method = matrix_methods[method_all_index].name;
t = stress_time_now();
matrix_methods[method_all_index].func[0](n, a, b, r);
matrix_metrics[method_all_index].duration += stress_time_now() - t;
matrix_metrics[method_all_index].count += 1.0;
}
/*
* stress_matrix_yx_all()
* iterate over all matrix stressors
*/
static void OPTIMIZE3 stress_matrix_yx_all(
const size_t n,
stress_matrix_type_t a[RESTRICT n][n],
stress_matrix_type_t b[RESTRICT n][n],
stress_matrix_type_t r[RESTRICT n][n])
{
double t;
current_method = matrix_methods[method_all_index].name;
t = stress_time_now();
matrix_methods[method_all_index].func[1](n, a, b, r);
matrix_metrics[method_all_index].duration += stress_time_now() - t;
matrix_metrics[method_all_index].count += 1.0;
}
static inline size_t round_up(size_t page_size, size_t n)
{
page_size = (page_size == 0) ? 4096 : page_size;
return (n + page_size - 1) & (~(page_size -1));
}
/*
* stress_matrix_data()
*` generate some random data scaled by v
*/
static inline stress_matrix_type_t stress_matrix_data(const stress_matrix_type_t v)
{
const uint64_t r = stress_mwc64();
return v * (stress_matrix_type_t)r;
}
static inline int stress_matrix_exercise(
stress_args_t *args,
const size_t matrix_method,
const size_t matrix_yx,
const size_t n)
{
typedef stress_matrix_type_t (*matrix_ptr_t)[n];
int ret = EXIT_NO_RESOURCE;
const size_t matrix_size = sizeof(stress_matrix_type_t) * n * n;
const size_t matrix_mmap_size = round_up(args->page_size, matrix_size);
const size_t num_matrix_methods = SIZEOF_ARRAY(matrix_methods);
const stress_matrix_func_t func = matrix_methods[matrix_method].func[matrix_yx];
const bool verify = !!(g_opt_flags & OPT_FLAGS_VERIFY);
matrix_ptr_t a, b = NULL, r = NULL, s = NULL;
register size_t i, j;
const stress_matrix_type_t v = 65535 / (stress_matrix_type_t)((uint64_t)~0);
int flags = MAP_PRIVATE | MAP_ANONYMOUS;
#if defined(MAP_POPULATE)
flags |= MAP_POPULATE;
#endif
method_all_index = 1;
current_method = matrix_methods[matrix_method].name;
for (i = 0; i < num_matrix_methods; i++) {
matrix_metrics[i].duration = 0.0;
matrix_metrics[i].count = 0.0;
}
a = (matrix_ptr_t)stress_mmap_populate(NULL, matrix_mmap_size,
PROT_READ | PROT_WRITE, flags, -1, 0);
if (a == MAP_FAILED) {
pr_fail("%s: matrix allocation failed, out of memory\n", args->name);
goto tidy_ret;
}
b = (matrix_ptr_t)stress_mmap_populate(NULL, matrix_mmap_size,
PROT_READ | PROT_WRITE, flags, -1, 0);
if (b == MAP_FAILED) {
pr_fail("%s: matrix allocation failed, out of memory\n", args->name);
goto tidy_a;
}
r = (matrix_ptr_t)stress_mmap_populate(NULL, matrix_mmap_size,
PROT_READ | PROT_WRITE, flags, -1, 0);
if (r == MAP_FAILED) {
pr_fail("%s: matrix allocation failed, out of memory\n", args->name);
goto tidy_b;
}
if (verify) {
s = (matrix_ptr_t)stress_mmap_populate(NULL, matrix_mmap_size,
PROT_READ | PROT_WRITE, flags, -1, 0);
if (s == MAP_FAILED) {
pr_fail("%s: matrix allocation failed, out of memory\n", args->name);
goto tidy_r;
}
}
/*
* Initialise matrices
*/
for (i = 0; i < n; i++) {
for (j = 0; j < n; j++) {
a[i][j] = stress_matrix_data(v);
b[i][j] = stress_matrix_data(v);
r[i][j] = 0.0;
}
}
ret = EXIT_SUCCESS;
/*
* Normal use case, 100% load, simple spinning on CPU
*/
do {
double t;
t = stress_time_now();
(void)func(n, a, b, r);
matrix_metrics[matrix_method].duration += stress_time_now() - t;
matrix_metrics[matrix_method].count += 1.0;
stress_bogo_inc(args);
if (verify) {
t = stress_time_now();
(void)func(n, a, b, s);
matrix_metrics[matrix_method].duration += stress_time_now() - t;
matrix_metrics[matrix_method].count += 1.0;
stress_bogo_inc(args);
if (shim_memcmp(r, s, matrix_size)) {
pr_fail("%s: %s: data difference between identical matrix computations\n",
args->name, current_method);
ret = EXIT_FAILURE;
}
}
if (matrix_method == 0) {
method_all_index++;
if (method_all_index >= SIZEOF_ARRAY(matrix_methods))
method_all_index = 1;
}
} while (stress_continue(args));
/* Dump metrics except for 'all' method */
for (i = 1, j = 0; i < num_matrix_methods; i++) {
if (matrix_metrics[i].duration > 0.0) {
char msg[64];
const double rate = matrix_metrics[i].count / matrix_metrics[i].duration;
(void)snprintf(msg, sizeof(msg), "%s matrix ops per sec", matrix_methods[i].name);
stress_metrics_set(args, j, msg,
rate, STRESS_METRIC_HARMONIC_MEAN);
j++;
}
}
if (verify)
(void)munmap((void *)s, matrix_mmap_size);
tidy_r:
(void)munmap((void *)r, matrix_mmap_size);
tidy_b:
(void)munmap((void *)b, matrix_mmap_size);
tidy_a:
(void)munmap((void *)a, matrix_mmap_size);
tidy_ret:
return ret;
}
/*
* stress_matrix()
* stress CPU by doing floating point math ops
*/
static int stress_matrix(stress_args_t *args)
{
size_t matrix_method = 0; /* All method */
size_t matrix_size = DEFAULT_MATRIX_SIZE;
size_t matrix_yx = 0;
int rc;
stress_catch_sigill();
(void)stress_get_setting("matrix-method", &matrix_method);
(void)stress_get_setting("matrix-yx", &matrix_yx);
if (args->instance == 0)
pr_dbg("%s: using method '%s' (%s)\n", args->name, matrix_methods[matrix_method].name,
matrix_yx ? "y by x" : "x by y");
if (!stress_get_setting("matrix-size", &matrix_size)) {
if (g_opt_flags & OPT_FLAGS_MAXIMIZE)
matrix_size = MAX_MATRIX_SIZE;
if (g_opt_flags & OPT_FLAGS_MINIMIZE)
matrix_size = MIN_MATRIX_SIZE;
}
stress_set_proc_state(args->name, STRESS_STATE_SYNC_WAIT);
stress_sync_start_wait(args);
stress_set_proc_state(args->name, STRESS_STATE_RUN);
rc = stress_matrix_exercise(args, matrix_method, matrix_yx, matrix_size);
stress_set_proc_state(args->name, STRESS_STATE_DEINIT);