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tests: add benchmark for fast_atof()

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This commit is contained in:
Hugues Delorme 2016-01-12 16:32:11 +01:00
parent decb5fedc7
commit 8c5aea272f
4 changed files with 240 additions and 48 deletions
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4
tests/CMakeLists.txt
View File

@ -29,10 +29,12 @@ file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/temp)
set(GMIO_TEST_CORE_SRC
main_test_core.c
test_core.c
test_core_benchmark_fast_atof.c
test_core_internal.c
test_core_platform.c
core_utils.c
stream_buffer.c)
stream_buffer.c
../benchmarks/commons/benchmark_tools.c)
if(GMIO_BUILD_SHARED_LIBS)
# Note_1: MSVC wants it because internal symbols are not exported (GCC
# exports all symbols)

4
tests/main_test_core.c
View File

@ -23,10 +23,10 @@ const char* test_core__stream();
const char* test_internal__byte_swap();
const char* test_internal__byte_codec();
const char* test_internal__fast_atof();
const char* test_internal__gmio_fast_atof();
const char* test_internal__safe_cast();
const char* test_internal__stringstream();
const char* test_internal__string_utils();
const char* test_internal__benchmark_gmio_fast_atof();
const char* test_platform__alignment();
const char* test_platform__global_h();
@ -44,10 +44,10 @@ const char* all_tests()
UTEST_RUN(test_internal__byte_swap);
UTEST_RUN(test_internal__byte_codec);
UTEST_RUN(test_internal__fast_atof);
UTEST_RUN(test_internal__gmio_fast_atof);
UTEST_RUN(test_internal__safe_cast);
UTEST_RUN(test_internal__stringstream);
UTEST_RUN(test_internal__string_utils);
UTEST_RUN(test_internal__benchmark_gmio_fast_atof);
UTEST_RUN(test_platform__alignment);
UTEST_RUN(test_platform__global_h);

183
tests/test_core_benchmark_fast_atof.c Normal file
View File

@ -0,0 +1,183 @@
/****************************************************************************
** gmio
** Copyright Fougue (2 Mar. 2015)
** contact@fougue.pro
**
** This software is a reusable library whose purpose is to provide complete
** I/O support for various CAD file formats (eg. STL)
**
** This software is governed by the CeCILL-B license under French law and
** abiding by the rules of distribution of free software. You can use,
** modify and/ or redistribute the software under the terms of the CeCILL-B
** license as circulated by CEA, CNRS and INRIA at the following URL
** "http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html".
****************************************************************************/
#include "utest_assert.h"
#include "../benchmarks/commons/benchmark_tools.h"
#include "../src/gmio_core/internal/fast_atof.h"
#include <stdio.h>
#include <stdlib.h>
static const float float_array[] = {
1145816.0615274f,
859213.75982427f,
966810.0021625f,
116009.39334184f,
-71263.236445963f,
1632844.0273334f,
56876.761679015f,
1670907.7036338f,
1437992.5029064f,
706598.88550015f,
1912856.6587869f,
-74873.963359219f,
861707.30952253f,
251769.8571327f,
1699911.3574624f,
187482.6645886f,
635324.18922303f,
825239.16816583f,
923229.60096562f,
1671951.443363f,
1229446.7883787f,
757413.85596684f,
-14473.833429848f,
1322835.7150326f,
-33251.199514256f,
1531123.3647313f,
528501.5790856f,
436167.23596871f,
14397.062228246f,
1454939.7571268f,
1692972.0920012f,
1780646.3084559f,
989713.49335728f,
1541628.0544557f,
10818.210575179f,
193697.32038756f,
459958.03305877f,
386664.66157262f,
1424156.8543595f,
1737569.8573131f,
998766.07898565f,
1498818.5395481f,
1245966.4099132f,
1455428.7210365f,
197385.08439501f,
879153.40041702f,
-82192.77676297f,
899980.71459121f,
442951.18727859f,
429733.95261435f,
-91807.596567929f,
242590.54984087f,
38434.983528422f,
1438265.2223754f,
94147.7701972f,
1883829.7321852f,
692408.39047935f,
1102390.5784368f,
1195454.442173f,
1016988.4061986f,
329433.38976681f,
34867.718878606f,
1139500.6440764f,
1105145.6145966f,
857621.72278837f,
385386.37328212f,
99213.089933252f,
1057370.9274909f,
618583.85429652f,
243663.42967547f,
953197.6427665f,
1965283.5770814f,
1104619.5847935f,
260492.339805f,
234207.59892753f,
1614202.0538515f,
1189281.6673914f,
1554272.0507617f,
1025472.5255656f,
1222277.3171599f,
1453022.1682289f,
1456530.4573889f,
-85452.126751399f,
12215.028755467f,
1387416.2917898f,
1526189.9514246f,
1610725.9704781f,
190781.76379706f,
854656.48162861f,
1351074.6843419f,
551066.49000713f,
52031.184291482f,
1173924.6147098f,
723591.50886703f,
1147671.5720946f,
918000.17292518f,
1489562.4640815f,
509914.95117076f,
716195.46181345f,
1981909.6994968f,
};
static void test_internal__run_atof(float (*func_atof)(const char*))
{
size_t iter;
for (iter = 0; iter < 1000; ++iter) {
size_t i;
for (i = 0; i < GMIO_ARRAY_SIZE(float_array); ++i) {
char strbuff[512] = {0};
const float f = float_array[i];
float fres = 0.f;
sprintf(strbuff, "%f", f);
fres = func_atof(strbuff);
sprintf(strbuff, "%E", f);
fres = func_atof(strbuff);
}
}
}
static float float_strtod(const char* str)
{
return (float)strtod(str, NULL);
}
static void benchmark_fast_atof(const char* dummy)
{
GMIO_UNUSED(dummy);
test_internal__run_atof(&fast_atof);
}
static void benchmark_strtod(const char* dummy)
{
GMIO_UNUSED(dummy);
test_internal__run_atof(&float_strtod);
}
const char* test_internal__benchmark_gmio_fast_atof()
{
struct benchmark_cmp_arg bmk_arg[] = {
{ "str->float", &benchmark_fast_atof, NULL, &benchmark_strtod, NULL },
{0}
};
struct benchmark_cmp_result bmk_res = {0};
const struct benchmark_cmp_result_header header = { "fast_atof", "strtod" };
struct benchmark_cmp_result_array bmk_res_array = {0};
benchmark_cmp_batch(2, bmk_arg, &bmk_res, NULL, NULL);
bmk_res_array.ptr = &bmk_res;
bmk_res_array.count = 1;
puts("\n");
benchmark_print_results(
BENCHMARK_PRINT_FORMAT_MARKDOWN,
header,
bmk_res_array);
UTEST_ASSERT((1.2*bmk_res.func1_exec_time_ms) < bmk_res.func2_exec_time_ms);
return NULL;
}

97
tests/test_core_internal.c
View File

@ -24,6 +24,7 @@
#include "../src/gmio_core/internal/numeric_utils.h"
#include "../src/gmio_core/internal/safe_cast.h"
#include "../src/gmio_core/internal/stringstream.h"
#include "../src/gmio_core/internal/stringstream_fast_atof.h"
#include "../src/gmio_core/internal/string_utils.h"
#include <stdlib.h>
@ -60,29 +61,59 @@ const char* test_internal__byte_codec()
return NULL;
}
static gmio_bool_t gmio_test_calculation_atof(const char* value_str)
static void gmio_test_atof_fprintf_err(
const char* func_fast_atof_str,
const char* val_str,
float fast_val,
float std_val)
{
const gmio_float32_t fast_value = fast_atof(value_str);
const gmio_float32_t std_value = (gmio_float32_t)strtod(value_str, NULL);
const gmio_bool_t accurate =
gmio_float32_ulp_equals(fast_value, std_value, 1);
if (!accurate) {
fprintf(stderr,
"*** ERROR: fast_atof() less accurate than strtod()\n"
" value_str : \"%s\"\n"
" fast_value: %.12f (%s) as_int: 0x%x\n"
" std_value : %.12f (%s) as_int: 0x%x\n"
" ulp_diff : %u\n",
value_str,
fast_value,
gmio_float32_sign(fast_value) > 0 ? "+" : "-",
gmio_convert_uint32(fast_value),
std_value,
gmio_float32_sign(std_value) > 0 ? "+" : "-",
gmio_convert_uint32(std_value),
gmio_float32_ulp_diff(fast_value, std_value));
fprintf(stderr,
"*** ERROR: %s() less accurate than strtod()\n"
" value_str : \"%s\"\n"
" fast_value: %.12f (%s) as_int: 0x%x\n"
" std_value : %.12f (%s) as_int: 0x%x\n"
" ulp_diff : %u\n",
func_fast_atof_str,
val_str,
fast_val,
gmio_float32_sign(fast_val) > 0 ? "+" : "-",
gmio_convert_uint32(fast_val),
std_val,
gmio_float32_sign(std_val) > 0 ? "+" : "-",
gmio_convert_uint32(std_val),
gmio_float32_ulp_diff(fast_val, std_val));
}
static gmio_bool_t gmio_test_calculation_atof(const char* val_str)
{
const gmio_float32_t std_val = (gmio_float32_t)strtod(val_str, NULL);
int accurate_count = 0;
{ /* Test fast_atof() */
const gmio_float32_t fast_val = fast_atof(val_str);
if (gmio_float32_ulp_equals(fast_val, std_val, 1))
++accurate_count;
else
gmio_test_atof_fprintf_err("fast_atof", val_str, fast_val, std_val);
}
return accurate;
{ /* Test gmio_stringstream_fast_atof() */
char iobuff[512] = {0};
struct gmio_ro_buffer ibuff = gmio_ro_buffer(val_str, strlen(val_str), 0);
struct gmio_stringstream sstream = gmio_stringstream(
gmio_istream_buffer(&ibuff),
gmio_string(iobuff, 0, GMIO_ARRAY_SIZE(iobuff)));
const gmio_float32_t fast_val = gmio_stringstream_fast_atof(&sstream);
if (gmio_float32_ulp_equals(fast_val, std_val, 1)) {
++accurate_count;
}
else {
gmio_test_atof_fprintf_err(
"gmio_stringstream_fast_atof", val_str, fast_val, std_val);
}
}
return accurate_count == 2;
}
const char* test_internal__fast_atof()
@ -124,30 +155,6 @@ const char* test_internal__fast_atof()
return NULL;
}
const char* test_internal__gmio_fast_atof()
{
static const char fstr[] = "1234.567E05";
const float f1 = fast_atof(fstr);
{
char strbuff[2048] = {0};
struct gmio_stringstream sstream = {0};
struct gmio_ro_buffer streambuff = { fstr, sizeof(fstr) - 1, 0 };
float f2;
sstream.stream = gmio_istream_buffer(&streambuff);
sstream.strbuff.ptr = &strbuff[0];
sstream.strbuff.max_len = sizeof(strbuff) - 1;
gmio_stringstream_init(&sstream);
f2 = gmio_stringstream_fast_atof(&sstream);
UTEST_ASSERT(gmio_float32_ulp_equals(f1, f2, 1));
}
return NULL;
}
const char* test_internal__safe_cast()
{
#if GMIO_TARGET_ARCH_BIT_SIZE > 32