// Helper function to keep code base small
void gport_ima_bench(struct rusage *_start,
struct rusage *_finish,
unsigned long int *_num_iterations,
unsigned int _n)
{
// initialize port
gport p = gport_create(2*_n-1,sizeof(int));
int w[_n]; // external buffer for writing
int r[_n]; // external buffer for reading
unsigned long int i;
// start trials:
// write to port, read from port
getrusage(RUSAGE_SELF, _start);
for (i=0; i<(*_num_iterations); i++) {
// producer: write data to port from external buffer
gport_produce(p,(void*)w,_n);
// consumer: read data from port to external buffer
gport_consume(p,(void*)r,_n);
}
getrusage(RUSAGE_SELF, _finish);
*_num_iterations *= _n;
gport_destroy(p);
}
// consumer uses indirect memory access
void consumer_handler ( void *_ptr )
{
gport p = (gport) _ptr;
unsigned int i, n=0;
int r[CONSUMER_SIZE_MAX];
unsigned int num_samples_remaining = NUM_SAMPLES_TOTAL;
while (num_samples_remaining > 0) {
// randomly choose consumer size
unsigned int k = (rand() % CONSUMER_SIZE_MAX) + 1;
if (k > num_samples_remaining)
k = num_samples_remaining;
printf(" consumer waiting for %u samples...\n", k);
gport_consume(p,(void*)r, k);
for (i=0; i<k; i++)
printf(" %3u: %d\n", n++, r[i]);
num_samples_remaining -= k;
}
printf(" consumer exiting thread\n");
pthread_exit(0); // exit thread
}
void consumer_handler ( void *_ptr )
{
gport p = (gport) _ptr;
unsigned int i, j, n=0;
int r[CONSUMER_SIZE];
int eom;
for (i=0; i<10; i++) {
printf(" consumer waiting for %u samples...\n", CONSUMER_SIZE);
eom = gport_consume(p,(void*)r,CONSUMER_SIZE);
if (eom) {
printf("consumer received eom\n");
break;
}
for (j=0; j<CONSUMER_SIZE; j++)
printf(" %3u: %d\n", n++, r[j]);
}
// give producer time to finish writing buffer, then broadcast eom
usleep(300000);
gport_signal_eom(p);
printf(" consumer exiting thread\n");
pthread_exit(0); // exit thread
}
