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/**********************************************************************
Copyright(c) 2011-2015 Intel Corporation All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**********************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h> // for memset, memcmp
#include "test.h"
#include "erasure_code.h"
//#define CACHED_TEST
#ifdef CACHED_TEST
// Cached test, loop many times over small dataset
# define TEST_SOURCES 10
# define TEST_LEN 8*1024
# define TEST_TYPE_STR "_warm"
#else
# ifndef TEST_CUSTOM
// Uncached test. Pull from large mem base.
# define TEST_SOURCES 10
# define GT_L3_CACHE 32*1024*1024 /* some number > last level cache */
# define TEST_LEN GT_L3_CACHE / TEST_SOURCES
# define TEST_TYPE_STR "_cold"
# else
# define TEST_TYPE_STR "_cus"
# endif
#endif
typedef unsigned char u8;
// Global GF(256) tables
u8 gff[256];
u8 gflog[256];
u8 gf_mul_table[256 * 256];
void mk_gf_field(void)
{
int i;
u8 s = 1;
gflog[0] = 0;
for (i = 0; i < 256; i++) {
gff[i] = s;
gflog[s] = i;
s = (s << 1) ^ ((s & 0x80) ? 0x1d : 0); // mult by GF{2}
}
}
void mk_gf_mul_table(u8 * table)
{
// Populate a single table with all multiply combinations for a fast,
// single-table lookup of GF(2^8) multiply at the expense of memory.
int i, j;
for (i = 0; i < 256; i++)
for (j = 0; j < 256; j++)
table[i * 256 + j] = gf_mul(i, j);
}
void gf_vect_dot_prod_ref(int len, int vlen, u8 * v, u8 ** src, u8 * dest)
{
int i, j;
u8 s;
for (i = 0; i < len; i++) {
s = 0;
for (j = 0; j < vlen; j++)
s ^= gf_mul(src[j][i], v[j]);
dest[i] = s;
}
}
void gf_vect_dot_prod_mult(int len, int vlen, u8 * v, u8 ** src, u8 * dest)
{
int i, j;
u8 s;
for (i = 0; i < len; i++) {
s = 0;
for (j = 0; j < vlen; j++) {
s ^= gf_mul_table[v[j] * 256 + src[j][i]];
}
dest[i] = s;
}
}
int main(void)
{
int i, j;
u8 vec[TEST_SOURCES], dest1[TEST_LEN], dest2[TEST_LEN];
u8 *matrix[TEST_SOURCES];
struct perf start;
mk_gf_field();
mk_gf_mul_table(gf_mul_table);
//generate random vector and matrix/data
for (i = 0; i < TEST_SOURCES; i++) {
vec[i] = rand();
if (!(matrix[i] = malloc(TEST_LEN))) {
fprintf(stderr, "Error failure\n\n");
return -1;
}
for (j = 0; j < TEST_LEN; j++)
matrix[i][j] = rand();
}
BENCHMARK(&start, BENCHMARK_TIME,
gf_vect_dot_prod_ref(TEST_LEN, TEST_SOURCES, vec, matrix, dest1));
printf("gf_vect_dot_prod_2tbl" TEST_TYPE_STR ": ");
perf_print(start, (long long)TEST_LEN * (TEST_SOURCES + 1));
BENCHMARK(&start, BENCHMARK_TIME,
gf_vect_dot_prod_mult(TEST_LEN, TEST_SOURCES, vec, matrix, dest2));
printf("gf_vect_dot_prod_1tbl" TEST_TYPE_STR ": ");
perf_print(start, (long long)TEST_LEN * (TEST_SOURCES + 1));
// Compare with reference function
if (0 != memcmp(dest1, dest2, TEST_LEN)) {
printf("Error, different results!\n\n");
return -1;
}
printf("Pass functional test\n");
return 0;
}
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