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Commit d7663ffe authored by Arnaud Blanchard's avatar Arnaud Blanchard
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Fix probleme of synchronization with history mode

parent 03a9bea4
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o_gnuplot/src/history_graph.cpp
View file @ d7663ffe
......@@ -5,194 +5,166 @@
#include <unistd.h>
typedef struct history:blc_array{
blc_array *array;
void init_timer();
void start_refresh_history_chars();
void start_refresh_history_floats();
int compute_next_k();
int sampling_period, iteration, length;
size_t element_size;
unsigned long initial_us;
blc_channel *input;
void init_timer();
int wait_next_k();
template <typename D_t> void start_refresh();
int iteration;
int length, sampling_period;
size_t element_size;
unsigned long initial_us;
}type_history;
type_history history;
pthread_mutex_t mutex=PTHREAD_MUTEX_INITIALIZER;
int k;
void type_history::init_timer(){
struct timeval initial_timer;
gettimeofday(&initial_timer, NULL);
length=dims[dims_nb-1].length;
initial_us = initial_timer.tv_sec*1000000+initial_timer.tv_usec;
k=length-1;
}
struct timeval initial_timer;
/**This is in order to take into acount the absolute time. If an iteration is longer than it should, the next one will be shorter.*/
int type_history::compute_next_k(){
div_t samples_div;
struct timeval timer;
gettimeofday(&timer, NULL);
//sample_div.quot is the theoritical iteration.
samples_div=div(timer.tv_sec*1000000+timer.tv_usec-initial_us, sampling_period);
//We try to stay in the midle of the iteration
if ((int)(iteration-samples_div.quot) >= 0) usleep((iteration+1-samples_div.quot)*sampling_period+sampling_period/2-samples_div.rem);
iteration++;
return div(samples_div.quot, length).rem;
gettimeofday(&initial_timer, NULL);
length=dims[dims_nb-1].length;
initial_us = initial_timer.tv_sec*1000000+initial_timer.tv_usec;
k=length-1;
}
void type_history::start_refresh_history_chars(){
int i, next_k;
while(1){
next_k=compute_next_k();
pthread_mutex_lock(&mutex);
if(next_k==k+1){ //normal case
FOR(i, array->total_length) chars[i*length+next_k]=array->chars[i];
}
else if ((next_k-k)>1){
color_eprintf(BLC_BRIGHT_YELLOW, "Missing '%d' samples\n", next_k-k);
FOR(i, array->total_length) memset(chars+i*length+k, array->chars[i], next_k-k+1);
}
else if (next_k==k){
color_eprintf(BLC_BRIGHT_YELLOW, "Twice the same sample iteration %d\n", iteration);
}
else FOR(i, array->total_length){ //It accross the end of the buffer
memset(chars+i*length+k, array->chars[i], length-k);
memset(chars+i*length, array->chars[i], next_k+1);
}
k=next_k;
pthread_mutex_unlock(&mutex);
}
/**This is in order to take into account the absolute time. If an iteration is longer than it should, the next one will be shorter.*/
int type_history::wait_next_k(){
div_t samples_div;
struct timeval timer;
gettimeofday(&timer, NULL);
//sample_div.quot is the theoritical iteration.
samples_div=div(timer.tv_sec*1000000+timer.tv_usec-initial_us, sampling_period);
//We try to stay in the middle of the iteration
if ((int)(iteration-samples_div.quot) >= 0) usleep((iteration+1-samples_div.quot)*sampling_period+sampling_period/2-samples_div.rem);
iteration++;
return div(samples_div.quot, length).rem;
}
void type_history::start_refresh_history_floats(){
int i, j, next_k;
while(1){
next_k=compute_next_k();
pthread_mutex_lock(&mutex);
if(next_k==k+1){ //normal case
FOR(i, array->total_length) floats[i*length+next_k]=array->floats[i];
}
else if ((next_k-k)>1){
color_eprintf(BLC_BRIGHT_YELLOW, "Missing '%d' samples\n", next_k-k);
FOR(i, array->total_length) for(j=k; j!=next_k+1; j++) floats[i*length+j]=array->floats[i];
}
else if (next_k==k){
color_eprintf(BLC_BRIGHT_YELLOW, "Twice the same sample iteration %d\n", iteration);
}
else FOR(i, array->total_length){ //It accross the end of the buffer
for(j=k; j!=length; j++) floats[i*length+j]=array->floats[i];
for(j=0; j!=next_k+1; j++) floats[i*length+j]=array->floats[i];
}
k=next_k;
pthread_mutex_unlock(&mutex);
}
template <typename D_t> void history::start_refresh(){
int i, j, next_k;
while(1){
if (input->sem_new_data) sem_wait(input->sem_new_data);
next_k=wait_next_k();
pthread_mutex_lock(&mutex);
if(next_k==k+1){ //normal case
FOR(i, input->total_length) ((D_t*)data)[i*length+next_k]=((D_t*)input->data)[i];
}
else if ((next_k-k)>1){
color_eprintf(BLC_BRIGHT_YELLOW, "Missing '%d' samples\n", next_k-k);
FOR(i, input->total_length) for(j=k; j!=next_k+1; j++) static_cast<D_t*>(data)[i*length+j]=static_cast<D_t*>(input->data)[i];
}
else if (next_k==k){
color_eprintf(BLC_BRIGHT_YELLOW, "Twice the same sample iteration %d\n", iteration);
}
else FOR(i, input->total_length){ //It accross the end of the buffer
for(j=k; j!=length; j++) static_cast<D_t*>(data)[i*length+j]=static_cast<D_t*>(input->data)[i];
for(j=0; j!=next_k+1; j++) static_cast<D_t*>(data)[i*length+j]=static_cast<D_t*>(input->data)[i];
}
if (input->sem_ack_data) sem_post(input->sem_ack_data);
k=next_k;
pthread_mutex_unlock(&mutex);
}
}
static void *refresh_history_cb(void *history_pt){
type_history *history=(type_history*)history_pt;
history->init_timer();
switch (history->type) {
case 'UIN8': case 'INT8':
history->start_refresh_history_chars();
break;
case 'FL32':
history->start_refresh_history_floats();
break;
default:
break;
}
return NULL;
type_history *history=(type_history*)history_pt;
history->init_timer();
switch (history->type) {
case 'UIN8': case 'INT8':
history->start_refresh<char>();
break;
case 'FL32':
history->start_refresh<float>();
break;
default:
break;
}
return NULL;
}
void create_history_graph(blc_channel *input, char const *title, int history_length, int refresh_period, int sampling_period, float min, float max, char const *verbatim){
char const *gnuplot_format=NULL;
char command[LINE_MAX];
char code;
int i, offset, columns_nb=0;
FILE *pipef;
pthread_t thread;
type_history history;
switch (input->dims_nb){
case 0:
columns_nb=1;
break;
case 1:
columns_nb=input->dims[0].length;
break;
default:
EXIT_ON_ARRAY_ERROR(input, "Too many dims");
break;
}
SYSTEM_ERROR_CHECK(pipef=popen("gnuplot", "w"), NULL, "Calling gnuplot");
switch (input->type){
case 'UIN8':
gnuplot_format="%uchar";
history.element_size=sizeof(uchar);
break;
case 'INT8':
gnuplot_format="%char";
history.element_size=sizeof(char);
break;
case 'FL32':
gnuplot_format="%float";
history.element_size=sizeof(float);
break;
default: EXIT_ON_ARRAY_ERROR(input, "The type is not managed");
}
init_term(pipef, title, verbatim);
fprintf(pipef, "set xlabel 'time(s)'\n");
if (min!=max) fprintf(pipef, "set yrange [%f:%f]\n", min, max);
offset=snprintf(command, LINE_MAX, "plot '-' binary format='%s' record=%d using ($0*%f):1 title '%d' with %s", gnuplot_format, history_length, sampling_period/1000000.f, 0, with_option);
for(i=1; i!=columns_nb; i++){
if (i<10) code=48+i; //01234567890
else if (i<36) code=97+i-10; //abc...xyz
else if (i<62) code=65+i-36; //ABC...XYZ
else if (i==62) code='[';
else if (i==63) code=']';
else EXIT_ON_ERROR("Too many columns. You have '%d' max is 64", columns_nb);
offset+=snprintf(command+offset, LINE_MAX-offset, ", '-' binary format='%s' record=%d u ($0*%f):1 t '%c' w %s", gnuplot_format, history_length, sampling_period/1000000.f, code, with_option);
}
history.init(input->type, input->format, 2, columns_nb, history_length);
history.sampling_period=sampling_period;
history.array=input;
pthread_create(&thread, NULL, refresh_history_cb, &history);
blc_loop_try_add_waiting_semaphore(input->sem_new_data);
blc_loop_try_add_posting_semaphore(input->sem_ack_data);
BLC_COMMAND_LOOP(refresh_period){
fprintf(pipef, "\n%s\n", command);
FOR(i, columns_nb){
pthread_mutex_lock(&mutex);
SYSTEM_ERROR_CHECK(fwrite(&history.chars[(i*history_length+k+1)*history.element_size], history.element_size, history_length-k-1, pipef), -1, NULL);
SYSTEM_ERROR_CHECK(fwrite(&history.chars[(i*history_length)*history.element_size], history.element_size, k+1, pipef), -1, NULL);
pthread_mutex_unlock(&mutex);
}
SYSTEM_ERROR_CHECK(fflush(pipef), -1, NULL);
}
SYSTEM_ERROR_CHECK(fclose(pipef), -1, NULL);
char const *gnuplot_format=NULL;
char command[LINE_MAX];
char code;
int i, offset, columns_nb=0;
FILE *pipef;
pthread_t thread;
switch (input->dims_nb){
case 0:
columns_nb=1;
break;
case 1:
columns_nb=input->dims[0].length;
break;
default:
EXIT_ON_ARRAY_ERROR(input, "Too many dims");
break;
}
SYSTEM_ERROR_CHECK(pipef=popen("gnuplot", "w"), NULL, "Calling gnuplot");
switch (input->type){
case 'UIN8':
gnuplot_format="%uchar";
history.element_size=sizeof(uchar);
break;
case 'INT8':
gnuplot_format="%char";
history.element_size=sizeof(char);
break;
case 'FL32':
gnuplot_format="%float";
history.element_size=sizeof(float);
break;
default: EXIT_ON_ARRAY_ERROR(input, "The type is not managed");
}
init_term(pipef, title, verbatim);
fprintf(pipef, "set xlabel 'time(s)'\n");
if (min!=max) fprintf(pipef, "set yrange [%f:%f]\n", min, max);
offset=snprintf(command, LINE_MAX, "plot '-' binary format='%s' record=%d using ($0*%f):1 title '%d' with %s", gnuplot_format, history_length, sampling_period/1000000.f, 0, with_option);
for(i=1; i!=columns_nb; i++){
if (i<10) code=48+i; //01234567890
else if (i<36) code=97+i-10; //abc...xyz
else if (i<62) code=65+i-36; //ABC...XYZ
else if (i==62) code='[';
else if (i==63) code=']';
else EXIT_ON_ERROR("Too many columns. You have '%d' max is 64", columns_nb);
offset+=snprintf(command+offset, LINE_MAX-offset, ", '-' binary format='%s' record=%d u ($0*%f):1 t '%c' w %s", gnuplot_format, history_length, sampling_period/1000000.f, code, with_option);
}
history.init(input->type, input->format, 2, columns_nb, history_length);
history.sampling_period=sampling_period;
history.input=input;
pthread_create(&thread, NULL, refresh_history_cb, &history);
BLC_COMMAND_LOOP(refresh_period){
fprintf(pipef, "\n%s\n", command);
FOR(i, columns_nb){
pthread_mutex_lock(&mutex);
SYSTEM_ERROR_CHECK(fwrite(&history.chars[(i*history_length+k+1)*history.element_size], history.element_size, history_length-k-1, pipef), -1, NULL);
SYSTEM_ERROR_CHECK(fwrite(&history.chars[(i*history_length)*history.element_size], history.element_size, k+1, pipef), -1, NULL);
pthread_mutex_unlock(&mutex);
}
SYSTEM_ERROR_CHECK(fflush(pipef), -1, NULL);
}
SYSTEM_ERROR_CHECK(fclose(pipef), -1, NULL);
}
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