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#include <unistd.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include "lf_ring_buffer.h"
#define BUFFER_LEN 5000000
static rb_data_t[BUFFER_LEN][RB_DATA_LEN]
static const double secs_per_tick = 1.0 / CLOCKS_PER_SEC;
static int64_t time_diff(struct timespec *t0, struct timespec *t1)
{
return ((t1->tv_sec * 1000000000) + t1->tv_nsec) - ((t0->tv_sec * 1000000000) + t0->tv_nsec);
}
static void print_now(char* s) {
fprintf(stdout,s);
fflush(stdout);
}
static void report( int n, uint64_t dt ) {
fprintf(stdout,"%d operations in %d [ms] => %d [us] => %d [ns]\t%d [ns/op]\n", n, (int)(dt/1000000), (int)(dt/1000), (int)dt, (int)(dt/n) );
}
static void feed_data( int n){
int i;
for(i=0; i<n; i++){
sprintf(data[i],"hello world %04d\n",i);
}
}
static uint64_t sequential_writes( lf_ring_buffer_t *ring, int n ) {
int i;
struct timespec start, end;
print_now("sequential writes ... ");
clock_gettime(CLOCK_MONOTONIC, &start);
for(i=0; i<n; i++) lf_ring_buffer_write( ring, data[i], 0 );
clock_gettime(CLOCK_MONOTONIC, &end);
printf("done.\n");
return time_diff( &start, &end );
}
static uint64_t sequential_reads( lf_ring_buffer_t *ring, int n ) {
int i;
char data[20];
struct timespec start, end;
print_now("sequential reads ... ");
clock_gettime(CLOCK_MONOTONIC, &start);
for(i=0; i<n; i++) lf_ring_buffer_read( ring, data, 0 );
clock_gettime(CLOCK_MONOTONIC, &end);
printf("done.\n");
return time_diff( &start, &end );
}
int main( int argc, char** argv ) {
int b_len = BUFFER_LEN;
lf_ring_buffer_t *ring;
ring = lf_ring_buffer_create( b_len );
if(ring==NULL){
fprintf(stderr,"ERROR : lf_ring_buffer_create( %d );\n",b_len);
exit( EXIT_FAILURE );
}
print_now("feed the data ... ");
feed_data(b_len);
printf("done.\n");
report( b_len, sequential_writes( ring, b_len ) );
report( sequential_reads( ring, b_len ) );
lf_ring_buffer_destroy( ring );
return EXIT_SUCCESS;
}
/*
#define ARRAY_SIZE 2
#define MAX_VALUE 0x10000
jack_ringbuffer_t *rb;
volatile int flowing = 0;
static int
fill_int_array (int *array, int start, int count)
{
int i, j = start;
for (i = 0; i < count; i++)
{
array[i] = j;
j = (j + 1) % MAX_VALUE;
}
return j;
}
static int
cmp_array (int *array1, int *array2, int count)
{
int i;
for (i = 0; i < count; i++)
if (array1[i] != array2[i])
{
printf("%d != %d at offset %d\n", array1[i], array2[i], i);
fflush(stdout);
return 0;
}
return 1;
}
static void *
reader_start (void * arg)
{
int i = 0, a[ARRAY_SIZE], b[ARRAY_SIZE];
unsigned long j = 0, nfailures = 0;
printf("[reader started] ");
fflush(stdout);
i = fill_int_array (a, i, ARRAY_SIZE);
while (1)
{
if (j == 100 && !flowing)
{
printf("[flowing] ");
fflush(stdout);
flowing = 1;
}
if (jack_ringbuffer_read_space (rb) >= (int) ARRAY_SIZE * (int) sizeof (int))
{
if (jack_ringbuffer_read (rb, (char *) b, ARRAY_SIZE * sizeof (int)))
{
if (!cmp_array (a, b, ARRAY_SIZE))
{
nfailures++;
//
//printf("failure in chunk %lu - probability: %lu/%lu = %.3f per million\n",
// j, nfailures, j, (float) nfailures / (j + 1) * 1000000);
//i = (b[0] + ARRAY_SIZE) % MAX_VALUE;
//
printf("FAILURE in chunk %lu\n", j);
fflush(stdout);
exit(1);
}
i = fill_int_array (a, i, ARRAY_SIZE);
j++;
}
}
}
return NULL;
}
static void *
writer_start (void * arg)
{
int i = 0, a[ARRAY_SIZE];
printf("[writer started] ");
fflush(stdout);
i = fill_int_array (a, i, ARRAY_SIZE);
while (1)
{
if (jack_ringbuffer_write_space (rb) >= (int) ARRAY_SIZE * (int) sizeof (int))
{
if (jack_ringbuffer_write (rb, (char *) a, ARRAY_SIZE * sizeof (int)))
{
i = fill_int_array (a, i, ARRAY_SIZE);
}
}
}
return NULL;
}
int main(int argc, char *argv[])
{
int size;
sscanf(argv[1], "%d", &size);
printf("starting (120s max) - array/buffer size: %d/%d\n",
(int) sizeof(int) * ARRAY_SIZE, size);
fflush(stdout);
rb = jack_ringbuffer_create(size);
pthread_t reader_thread, writer_thread;
if (pthread_create (&reader_thread, NULL, reader_start, NULL))
{
printf("Failed to create reader thread\n");
exit(1);
}
if (pthread_create (&writer_thread, NULL, writer_start, NULL))
{
printf("Failed to create writer thread\n");
exit(1);
}
sleep(120);
if (flowing)
printf("SUCCESS\n");
else
printf("FAILURE: data did not flow\n");
fflush(stdout);
return 0;
}
*/
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