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MessagePool.h
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MessagePool.h
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/*
author: Ehsan Totoni, [email protected]
December, 2011
*/
#define NO_MSG_SEGS 5
#define MSG_SEG_SIZE 100000
class MessagePool {
CProxy_ColumnsSolve thisProxy;
// message pool data structures
double* out_data; // store data to be sent out
// pre-allocated segments of size MSG_SEG_SIZE for NO_MSG_SEGS PEs
int* out_rowInd; // row index of each element
int *out_colsInd; // column index of each element in data array
int* out_size; // data size of each processor
int* index_out; // mapping of processor number to out data structure's index
// last chare accessed, for faster search, mapped index, number of segments occupied
int lastChare, lastChare_ind, no_pe_segs;
public:
MessagePool(CProxy_ColumnsSolve p) {
thisProxy = p;
out_data = new double[NO_MSG_SEGS*MSG_SEG_SIZE];
out_rowInd = new int[NO_MSG_SEGS*MSG_SEG_SIZE];
out_size = new int[NO_MSG_SEGS];
memset(out_size, 0, NO_MSG_SEGS*sizeof(int));
index_out = new int[NO_MSG_SEGS];
for (int i=0; i<NO_MSG_SEGS; i++)
index_out[i] = -1;
lastChare = lastChare_ind = -1;
no_pe_segs = 0;
}
void add(int chare_no, int row, double val) {
int chare_index, out_ind;
// find PE
if (chare_no==lastChare && no_pe_segs) { // last chare and not flushed
chare_index = lastChare_ind;
} else {
int i;
for (i=0; i<no_pe_segs; i++)
if (index_out[i]==chare_no) {
chare_index = i;
break;
}
// if PE is not allocated
if (i==no_pe_segs) {
chare_index = allocMsgSeg();
index_out[chare_index] = chare_no;
}
}
lastChare = chare_no;
lastChare_ind = chare_index;
out_ind = out_size[chare_index]++;
out_ind += chare_index*MSG_SEG_SIZE;
out_data[out_ind] = val;
out_rowInd[out_ind] = row;
// check for full buffer
if (out_size[lastChare_ind]==MSG_SEG_SIZE)
flushMsgPool();
}
int allocMsgSeg() {
int PE_index = -1;
if (no_pe_segs!=NO_MSG_SEGS) {
/// initialize---------
PE_index = no_pe_segs++;
} else {
flushMsgPool();
PE_index = 0;
no_pe_segs=1;
}
out_size[PE_index] = 0;
return PE_index;
}
void flushMsgPool() {
for (int i=0; i<no_pe_segs; i++) {
CkEntryOptions opts;
opts.setQueueing(CK_QUEUEING_IFIFO);
opts.setPriority(0);
thisProxy[index_out[i]].receiveData(out_size[i], &out_data[i*MSG_SEG_SIZE], &out_rowInd[i*MSG_SEG_SIZE], &opts);
}
no_pe_segs=0;
}
};