// return -1 when not supported
int numUniqNodes() {
#if 0
if (numNodes != 0) return numNodes;
int n = 0;
for (int i=0; i<CmiNumPes(); i++)
if (nodeIDs[i] > n)
n = nodeIDs[i];
numNodes = n+1;
return numNodes;
#else
if (numNodes > 0) return numNodes; // already calculated
CkVec<int> unodes;
int i;
for (i=0; i<numPes; i++) unodes.push_back(nodeIDs[i]);
//unodes.bubbleSort(0, numPes-1);
unodes.quickSort();
int last = -1;
std::map<int, int> nodemap; // nodeIDs can be out of range of [0,numNodes]
for (i=0; i<numPes; i++) {
if (unodes[i] != last) {
last=unodes[i];
nodemap[unodes[i]] = numNodes;
numNodes++;
}
}
if (numNodes == 0) {
numNodes = CmiNumNodes();
numPes = CmiNumPes();
}
else {
// re-number nodeIDs, which may be necessary e.g. on BlueGene/P
for (i=0; i<numPes; i++) nodeIDs[i] = nodemap[nodeIDs[i]];
CpuTopology::supported = 1;
}
return numNodes;
#endif
}
