void func_worker_1(void* arg) {
int worker_1_param = *((int*)arg);
// For each of the messages that is received
for (int i = 0; i < 5; ++i) {
mp_recv(&chan1);
for(int j = 0; j < chan1.buf_size; j++){
// Copy the received data to the send buffer
int to_offset = i * chan1.buf_size + j;
volatile char _SPM * copy_to;
volatile char _SPM * copy_from;
copy_to = (volatile char _SPM *)chan2.write_buf + to_offset;
copy_from = (volatile char _SPM *)chan1.read_buf + j;
// Like a Cesar code, shifting the ascii alphabet
*copy_to = (*copy_from)+(char)worker_1_param;
}
// Acknowledge the received data.
mp_ack(&chan1);
}
mp_barrier(&comm);
mp_send(&chan2);
int ret = 0;
corethread_exit(&ret);
return;
}
int latency_slave(int cnt, int bytes) {
int i;
for (i=0; i<cnt; i++) {
if (flush & FLUSH_BETWEEN_ITERATIONS) {
inval_dcache();
inval_mcache();
}
mp_recv_size(&m2s,bytes);
}
mp_send(&s2m);
return 0;
}
void mp_send_size(mpd_t* mpd_ptr, int bytes) {
int k = 0;
while(k < bytes) {
int chunk = 0;
if ( bytes-k >= mpd_ptr->buf_size) {
// If the remaining data is more than the size of the buffer
chunk = mpd_ptr->buf_size;
} else {
// The remaining data all fits in a buffer
chunk = bytes-k;
}
// Copy the chunk of data to the write buffer
// for (int j = 0; j < chunk; ++j) {
// *((volatile char _SPM *)m2s.write_buf+j) = send_data[k+j];
// }
// Send the chunk of data
mp_send(mpd_ptr);
DEBUGGER("Message sent\n");
k += chunk;
}
}
int main() {
puts("Master");
corethread_t worker_1 = 2; // For now the core ID
int worker_1_param = 1;
char send_data[] = "Hello World!, Sending messages is cool!";
char recv_data[40];
// Initialization of message passing buffers
// mp_chan_init() return false if local and remote
// addresses are not aligned to words
if (!mp_chan_init(&chan1,
get_cpuid(),
worker_1,
MP_CHAN_1_BUF_SIZE,
MP_CHAN_1_NUM_BUF)) {
abort();
}
if (!mp_chan_init(&chan2,
worker_1,
get_cpuid(),
MP_CHAN_2_BUF_SIZE,
MP_CHAN_2_NUM_BUF)) {
abort();
}
puts("Initialized buffers");
if (!mp_communicator_init(&comm,
2,
cores,
0)) {
abort();
}
puts("Initialized barrier");
corethread_create(&worker_1,&func_worker_1,(void*)&worker_1_param);
int i = 0;
// While there is still data to be sent
while(i < sizeof(send_data)) {
int chunk = 0;
if ( sizeof(send_data)-i >= chan1.buf_size) {
// If the remaining data is more than the size of the buffer
chunk = chan1.buf_size;
} else {
// The remaining data all fits in a buffer
chunk = sizeof(send_data)-i;
}
// Copy the chunk of data to the write buffer
for (int j = 0; j < chunk; ++j) {
*((volatile char _SPM *)chan1.write_buf+j) = send_data[i+j];
}
// Send the chunk of data
mp_send(&chan1);
i += chunk;
}
puts("Messages sent");
mp_barrier(&comm);
puts("Barrier reached");
mp_recv(&chan2);
puts("Message recv");
// Copy the received data to the recv_data array
for(int i = 0; i < sizeof(recv_data)-1; i++) {
recv_data[i] = (*((volatile char _SPM *)chan2.read_buf+i)-worker_1_param);
}
// Acknowledge the received data
mp_ack(&chan2);
recv_data[39] = '\0';
puts(recv_data);
int* res;
corethread_join(worker_1,&res);
return *res;
}
void bench_noc() {
// Pointer to the deadline device
volatile _IODEV int *dead_ptr = (volatile _IODEV int *) PATMOS_IO_DEADLINE;
// Measure execution time with the clock cycle timer
volatile _IODEV int *timer_ptr = (volatile _IODEV int *) (PATMOS_IO_TIMER+4);
printf("Hello NoC\n");
printf("We use %d bytes buffers\n", BUF_SIZE);
int core_id = 1; // The core number
corethread_create(core_id, &work, NULL);
int start, val;
int data = 42;
// create a channel
qpd_t *channel = mp_create_qport(1, SOURCE, BUF_SIZE, NUM_BUF);
// init
mp_init_ports();
start = *timer_ptr;
// write data into the send buffer
*(volatile int _SPM *) channel->write_buf = data;
start = *timer_ptr;
// send the buffer
mp_send(channel, 0);
printf("Data sent\n");
printf("Returned data is: %d\n", field);
printf("Took %d cycles\n", end_time - start - 1);
int min = 999999;
int max = 0;
printf("NoC in a loop:\n");
for (int i=0; i<CNT; ++i) {
start = *timer_ptr;
*(volatile int _SPM *) channel->write_buf = i;
start = *timer_ptr;
mp_send(channel, 0);
*dead_ptr = 10000; // some delay to see the result
val = *dead_ptr;
val = end_time - start - 1;
// printf("%d ", val);
if (min>val) min = val;
if (max<val) max = val;
}
printf("\n");
printf("Min: %d max: %d\n", min, max);
min = 999999;
max = 0;
do_delay_times();
printf("NoC in a loop with random delay:\n");
for (int i=0; i<CNT; ++i) {
start = *timer_ptr;
*(volatile int _SPM *) channel->write_buf = i;
*dead_ptr = data_spm[i];
val = *dead_ptr; // delay by a random value
start = *timer_ptr;
mp_send(channel, 0);
*dead_ptr = 3000; // some delay to see the result
val = *dead_ptr;
val = end_time - start;
// printf("%d ", val);
if (min>val) min = val;
if (max<val) max = val;
}
printf("\n");
printf("Min: %d max: %d\n", min, max);
// not really as the worker runs forever
int* res;
corethread_join( core_id, (void *) &res );
}