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jack_simdtests: add application checking accurracy and performance of SIMD optimizations 

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
tags/v1.9.11-RC1
Andreas Müller 8 years ago
parent
77bb8be12e
commit
c32b823860
2 changed files with 392 additions and 1 deletions
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  1. +390
    -0
      example-clients/simdtests.cpp
  2. +2
    -1
      example-clients/wscript

+ 390
- 0
example-clients/simdtests.cpp View File

@@ -0,0 +1,390 @@
/*
* simdtests.c -- test accuraccy and performance of simd optimizations
*
* Copyright (C) 2017 Andreas Mueller.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/* We must include all headers memops.c includes to avoid trouble with
* out namespace game below.
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <memory.h>
#include <stdlib.h>
#include <stdint.h>
#include <limits.h>
#ifdef __linux__
#include <endian.h>
#endif
#include "memops.h"

#if defined (__SSE2__) && !defined (__sun__)
#include <emmintrin.h>
#ifdef __SSE4_1__
#include <smmintrin.h>
#endif
#endif

#ifdef __ARM_NEON__
#include <arm_neon.h>
#endif

// our additional headers
#include <time.h>

/* Dirty: include mempos.c twice the second time with SIMD disabled
* so we can compare aceelerated non accelerated
*/
namespace accelerated {
#include "../common/memops.c"
}

namespace origerated {
#ifdef __SSE2__
#undef __SSE2__
#endif

#ifdef __ARM_NEON__
#undef __ARM_NEON__
#endif

#include "../common/memops.c"
}

// define conversion function types
typedef void (*t_jack_to_integer)(
char *dst,
jack_default_audio_sample_t *src,
unsigned long nsamples,
unsigned long dst_skip,
dither_state_t *state);

typedef void (*t_integer_to_jack)(
jack_default_audio_sample_t *dst,
char *src,
unsigned long nsamples,
unsigned long src_skip);

// define/setup test case data
typedef struct test_case_data {
uint32_t frame_size;
uint32_t sample_size;
bool reverse;
t_jack_to_integer jack_to_integer_accel;
t_jack_to_integer jack_to_integer_orig;
t_integer_to_jack integer_to_jack_accel;
t_integer_to_jack integer_to_jack_orig;
dither_state_t *ditherstate;
const char *name;
} test_case_data_t;

test_case_data_t test_cases[] = {
{
4,
3,
true,
accelerated::sample_move_d32u24_sSs,
origerated::sample_move_d32u24_sSs,
accelerated::sample_move_dS_s32u24s,
origerated::sample_move_dS_s32u24s,
NULL,
"32u24s" },
{
4,
3,
false,
accelerated::sample_move_d32u24_sS,
origerated::sample_move_d32u24_sS,
accelerated::sample_move_dS_s32u24,
origerated::sample_move_dS_s32u24,
NULL,
"32u24" },
{
3,
3,
true,
accelerated::sample_move_d24_sSs,
origerated::sample_move_d24_sSs,
accelerated::sample_move_dS_s24s,
origerated::sample_move_dS_s24s,
NULL,
"24s" },
{
3,
3,
false,
accelerated::sample_move_d24_sS,
origerated::sample_move_d24_sS,
accelerated::sample_move_dS_s24,
origerated::sample_move_dS_s24,
NULL,
"24" },
{
2,
2,
true,
accelerated::sample_move_d16_sSs,
origerated::sample_move_d16_sSs,
accelerated::sample_move_dS_s16s,
origerated::sample_move_dS_s16s,
NULL,
"16s" },
{
2,
2,
false,
accelerated::sample_move_d16_sS,
origerated::sample_move_d16_sS,
accelerated::sample_move_dS_s16,
origerated::sample_move_dS_s16,
NULL,
"16" },
};

// we need to repeat for better accuracy at time measurement
const uint32_t retry_per_case = 1000;

// setup test buffers
#define TESTBUFF_SIZE 1024
jack_default_audio_sample_t jackbuffer_source[TESTBUFF_SIZE];
// integer buffers: max 4 bytes per value / * 2 for stereo
char integerbuffer_accel[TESTBUFF_SIZE*4*2];
char integerbuffer_orig[TESTBUFF_SIZE*4*2];
// float buffers
jack_default_audio_sample_t jackfloatbuffer_accel[TESTBUFF_SIZE];
jack_default_audio_sample_t jackfloatbuffer_orig[TESTBUFF_SIZE];

// comparing unsigned makes life easier
uint32_t extract_integer(
char* buff,
uint32_t offset,
uint32_t frame_size,
uint32_t sample_size,
bool big_endian)
{
uint32_t retval = 0;
unsigned char* curr;
uint32_t mult = 1;
if(big_endian) {
curr = (unsigned char*)buff + offset + sample_size-1;
for(uint32_t i=0; i<sample_size; i++) {
retval += *(curr--) * mult;
mult*=256;
}
}
else {
curr = (unsigned char*)buff + offset + frame_size-sample_size;
for(uint32_t i=0; i<sample_size; i++) {
retval += *(curr++) * mult;
mult*=256;
}
}
return retval;
}

int main(int argc, char *argv[])
{
// parse_arguments(argc, argv);
uint32_t maxerr_displayed = 10;

// fill jackbuffer
for(int i=0; i<TESTBUFF_SIZE; i++) {
// ramp
jack_default_audio_sample_t value =
((jack_default_audio_sample_t)((i % TESTBUFF_SIZE) - TESTBUFF_SIZE/2)) / (TESTBUFF_SIZE/2);
// force clipping
value *= 1.02;
jackbuffer_source[i] = value;
}

for(uint32_t testcase=0; testcase<sizeof(test_cases)/sizeof(test_case_data_t); testcase++) {
// test mono/stereo
for(uint32_t channels=1; channels<=2; channels++) {
//////////////////////////////////////////////////////////////////////////////
// jackfloat -> integer

// clean target buffers
memset(integerbuffer_accel, 0, sizeof(integerbuffer_accel));
memset(integerbuffer_orig, 0, sizeof(integerbuffer_orig));
// accel
clock_t time_to_integer_accel = clock();
for(uint32_t repetition=0; repetition<retry_per_case; repetition++)
{
test_cases[testcase].jack_to_integer_accel(
integerbuffer_accel,
jackbuffer_source,
TESTBUFF_SIZE,
test_cases[testcase].frame_size*channels,
test_cases[testcase].ditherstate);
}
float timediff_to_integer_accel = ((float)(clock() - time_to_integer_accel)) / CLOCKS_PER_SEC;
// orig
clock_t time_to_integer_orig = clock();
for(uint32_t repetition=0; repetition<retry_per_case; repetition++)
{
test_cases[testcase].jack_to_integer_orig(
integerbuffer_orig,
jackbuffer_source,
TESTBUFF_SIZE,
test_cases[testcase].frame_size*channels,
test_cases[testcase].ditherstate);
}
float timediff_to_integer_orig = ((float)(clock() - time_to_integer_orig)) / CLOCKS_PER_SEC;
// output performance results
printf(
"JackFloat->Integer @%7.7s/%u: Orig %7.6f sec / Accel %7.6f sec -> Win: %5.2f %%\n",
test_cases[testcase].name,
channels,
timediff_to_integer_orig,
timediff_to_integer_accel,
(timediff_to_integer_orig/timediff_to_integer_accel-1)*100.0);
uint32_t int_deviation_max = 0;
uint32_t int_error_count = 0;
// output error (avoid spam -> limit error lines per test case)
for(uint32_t sample=0; sample<TESTBUFF_SIZE; sample++) {
uint32_t sample_offset = sample*test_cases[testcase].frame_size*channels;
// compare both results
uint32_t intval_accel=extract_integer(
integerbuffer_accel,
sample_offset,
test_cases[testcase].frame_size,
test_cases[testcase].sample_size,
#if __BYTE_ORDER == __BIG_ENDIAN
!test_cases[testcase].reverse);
#else
test_cases[testcase].reverse);
#endif
uint32_t intval_orig=extract_integer(
integerbuffer_orig,
sample_offset,
test_cases[testcase].frame_size,
test_cases[testcase].sample_size,
#if __BYTE_ORDER == __BIG_ENDIAN
!test_cases[testcase].reverse);
#else
test_cases[testcase].reverse);
#endif
if(intval_accel != intval_orig) {
if(int_error_count<maxerr_displayed) {
printf("Value error sample %u:", sample);
printf(" Orig 0x");
char formatstr[10];
sprintf(formatstr, "%%0%uX", test_cases[testcase].sample_size*2);
printf(formatstr, intval_orig);
printf(" Accel 0x");
printf(formatstr, intval_accel);
printf("\n");
}
int_error_count++;
uint32_t int_deviation;
if(intval_accel > intval_orig)
int_deviation = intval_accel-intval_orig;
else
int_deviation = intval_orig-intval_accel;
if(int_deviation > int_deviation_max)
int_deviation_max = int_deviation;
}
}
printf(
"JackFloat->Integer @%7.7s/%u: Errors: %u Max deviation %u\n",
test_cases[testcase].name,
channels,
int_error_count,
int_deviation_max);

//////////////////////////////////////////////////////////////////////////////
// integer -> jackfloat

// clean target buffers
memset(jackfloatbuffer_accel, 0, sizeof(jackfloatbuffer_accel));
memset(jackfloatbuffer_orig, 0, sizeof(jackfloatbuffer_orig));
// accel
clock_t time_to_float_accel = clock();
for(uint32_t repetition=0; repetition<retry_per_case; repetition++)
{
test_cases[testcase].integer_to_jack_accel(
jackfloatbuffer_accel,
integerbuffer_orig,
TESTBUFF_SIZE,
test_cases[testcase].frame_size*channels);
}
float timediff_to_float_accel = ((float)(clock() - time_to_float_accel)) / CLOCKS_PER_SEC;
// orig
clock_t time_to_float_orig = clock();
for(uint32_t repetition=0; repetition<retry_per_case; repetition++)
{
test_cases[testcase].integer_to_jack_orig(
jackfloatbuffer_orig,
integerbuffer_orig,
TESTBUFF_SIZE,
test_cases[testcase].frame_size*channels);
}
float timediff_to_float_orig = ((float)(clock() - time_to_float_orig)) / CLOCKS_PER_SEC;
// output performance results
printf(
"Integer->JackFloat @%7.7s/%u: Orig %7.6f sec / Accel %7.6f sec -> Win: %5.2f %%\n",
test_cases[testcase].name,
channels,
timediff_to_float_orig,
timediff_to_float_accel,
(timediff_to_float_orig/timediff_to_float_accel-1)*100.0);
jack_default_audio_sample_t float_deviation_max = 0.0;
uint32_t float_error_count = 0;
// output error (avoid spam -> limit error lines per test case)
for(uint32_t sample=0; sample<TESTBUFF_SIZE; sample++) {
// For easier estimation/readabilty we scale floats back to integer
jack_default_audio_sample_t sample_scaling;
switch(test_cases[testcase].sample_size) {
case 2:
sample_scaling = SAMPLE_16BIT_SCALING;
break;
default:
sample_scaling = SAMPLE_24BIT_SCALING;
break;
}
jack_default_audio_sample_t floatval_accel = jackfloatbuffer_accel[sample] * sample_scaling;
jack_default_audio_sample_t floatval_orig = jackfloatbuffer_orig[sample] * sample_scaling;
// compare both results
jack_default_audio_sample_t float_deviation;
if(floatval_accel > floatval_orig)
float_deviation = floatval_accel-floatval_orig;
else
float_deviation = floatval_orig-floatval_accel;
if(float_deviation > float_deviation_max)
float_deviation_max = float_deviation;
// deviation > half bit => error
if(float_deviation > 0.5) {
if(float_error_count<maxerr_displayed) {
printf("Value error sample %u:", sample);
printf(" Orig %8.1f Accel %8.1f\n", floatval_orig, floatval_accel);
}
float_error_count++;
}
}
printf(
"Integer->JackFloat @%7.7s/%u: Errors: %u Max deviation %f\n",
test_cases[testcase].name,
channels,
float_error_count,
float_deviation_max);

printf("\n");
}
}
return 0;
}

+ 2
- 1
example-clients/wscript View File

@@ -28,7 +28,8 @@ example_programs = {
'jack_net_master' : 'netmaster.c',
'jack_latent_client' : 'latent_client.c',
'jack_midi_dump' : 'midi_dump.c',
'jack_midi_latency_test' : 'midi_latency_test.c'
'jack_midi_latency_test' : 'midi_latency_test.c',
'jack_simdtests' : 'simdtests.cpp'
}

example_libs = {


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