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_master(int cnt, int bytes) {
int i;
unsigned long long total = 0;
TIMER_START;
for (i=0; i<cnt; i++) {
if (flush & FLUSH_BETWEEN_ITERATIONS) {
inval_dcache();
inval_mcache();
}
mp_send_size(&m2s,bytes);
}
TIMER_STOP;
mp_recv(&s2m);
mp_ack(&s2m);
total = TIMER_ELAPSED;
total -= calibrate_cache_flush(cnt);
return(total/cnt);
}
// The main function for the other thread on the another core
void work(void* arg) {
// Measure execution time with the clock cycle timer
volatile _IODEV int *timer_ptr = (volatile _IODEV int *) (PATMOS_IO_TIMER+4);
int val, data;
qpd_t *channel = mp_create_qport(1, SINK, BUF_SIZE, NUM_BUF);
mp_init_ports();
for (;;) {
mp_recv(channel, 0);
val = *timer_ptr;
data = *(volatile int _SPM *) channel->read_buf;
mp_ack(channel, 0);
// Return time stamp and the change value in the shared variable
end_time = val;
field = data + 1;
}
}
int bandwidth_master(int cnt, int bytes)
{
int i;
unsigned long long total = 0;
TIMER_START;
for (i=0; i<cnt; i++)
{
if (flush & FLUSH_BETWEEN_ITERATIONS)
{
inval_dcache();
inval_mcache();
}
mp_send_size(&m2s, bytes);
}
mp_recv(&s2m);
mp_ack(&s2m);
TIMER_STOP;
total = TIMER_ELAPSED;
total -= calibrate_cache_flush(cnt);
return(((unsigned long long)cnt*bytes*1000000)/(total*1024)); /* KB/sec */
}
void mp_recv_size(mpd_t* mpd_ptr, int bytes) {
int k = 0;
while(k < bytes) {
mp_recv(mpd_ptr);
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 *)mpd_ptr.write_buf+j) = send_data[k+j];
// }
mp_ack(mpd_ptr);
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;
}