#include "surf_routing_cluster_fat_tree.hpp"
+#include "xbt/lib.h"
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
+#include <iostream>
+#include <fstream>
AsClusterFatTree::AsClusterFatTree() : levels(0) {}
-
+AsClusterFatTree::~AsClusterFatTree() {
+ for (unsigned int i = 0 ; i < this->nodes.size() ; i++) {
+ delete this->nodes[i];
+ }
+}
void AsClusterFatTree::getRouteAndLatency(RoutingEdgePtr src,
RoutingEdgePtr dst,
sg_platf_route_cbarg_t into,
double *latency) {
- // TODO
+
}
-void AsClusterFatTree::create_links() {
+/* This function makes the assumption that parse_specific_arguments() and
+ * addNodes() have already been called
+ */
+void AsClusterFatTree::create_links(sg_platf_cluster_cbarg_t cluster){
if(this->levels == 0) {
return;
}
+ this->generateSwitches();
+ this->generateLabels();
+ unsigned int k = 0;
+ // Nodes are totally ordered, by level and then by position, in this->nodes
+ for (unsigned int i = 0 ; i < this->levels ; i++) {
+ for (unsigned int j = 0 ; j < this->nodesByLevel[i] ; j++) {
+ if(i != this->levels - 1) {
+ for(unsigned int l = 0 ; l < this->nodesByLevel[i+1] ; l++) {
+ this->connectNodeToParents(cluster, this->nodes[k]);
+ }
+ }
+ k++;
+ }
+ }
+}
+
+int AsClusterFatTree::connectNodeToParents(sg_platf_cluster_cbarg_t cluster,
+ FatTreeNode *node) {
+ FatTreeNode* currentParentNode;
+ int connectionsNumber = 0;
+ const int level = node->level;
+ currentParentNode = this->nodes[this->getLevelPosition(level + 1)];
+ for (unsigned int i = 0 ; i < this->nodesByLevel[level] ; i++ ) {
+ if(this->areRelated(currentParentNode, node)) {
+ for (unsigned int j = 0 ; j < this->lowerLevelPortsNumber[level + 1] ; j++) {
+ this->addLink(cluster, currentParentNode, node->label[level + 1] +
+ j * this->lowerLevelNodesNumber[level + 1], node,
+ currentParentNode->label[level + 1] +
+ j * this->upperLevelNodesNumber[level + 1]);
+ }
+ connectionsNumber++;
+ }
+ }
+ return connectionsNumber;
+}
+
+
+bool AsClusterFatTree::areRelated(FatTreeNode *parent, FatTreeNode *child) {
+ if (parent->level != child->level + 1) {
+ return false;
+ }
- // for (unsigned int i = 0 ; i < this->levels)
+ for (unsigned int i = 0 ; i < this->levels; i++) {
+ if (parent->label[i] != child->label[i] && i != parent->level) {
+ return false;
+ }
+ }
+ return true;
+}
+
+void AsClusterFatTree::generateSwitches() {
+ this->nodesByLevel.resize(this->levels, 0);
+ unsigned int nodesRequired = 0;
+
+ // We take care of the number of nodes by level
+ this->nodesByLevel[0] = 1;
+ for (unsigned int i = 0 ; i < this->levels ; i++) {
+ this->nodesByLevel[0] *= this->lowerLevelNodesNumber[i];
+ }
+
+ if(this->nodesByLevel[0] < this->nodes.size()) {
+ surf_parse_error("There is not enough nodes to fit to the described topology."
+ " Please check your platform description (We need %d nodes, we only got %zu)",
+ this->nodesByLevel[0], this->nodes.size());
+ return;
+ }
+
+ for (unsigned int i = 0 ; i < this->levels ; i++) {
+ int nodesInThisLevel = 1;
+
+ for (unsigned int j = 0 ; j <= i ; j++) {
+ nodesInThisLevel *= this->upperLevelNodesNumber[j];
+ }
+
+ for (unsigned int j = i+1 ; j < this->levels ; j++) {
+ nodesInThisLevel *= this->lowerLevelNodesNumber[j];
+ }
+
+ this->nodesByLevel[i+1] = nodesInThisLevel;
+ nodesRequired += nodesInThisLevel;
+ }
+
+
+ // If we have to many compute nodes, we ditch them
+ if (this->nodesByLevel[0] > this->nodes.size()) {
+ for (unsigned int i = this->nodesByLevel[0] ; i < this->nodes.size() ; i++) {
+ delete this->nodes[i];
+ }
+ this->nodes.resize(this->nodesByLevel[0]);
+ }
+
+ // We create the switches
+ int k = 0;
+ for (unsigned int i = 0 ; i < this->levels ; i++) {
+ for (unsigned int j = 0 ; j < this->nodesByLevel[i] ; j++) {
+ FatTreeNode* newNode;
+ newNode = new FatTreeNode(--k, i + 1, j);
+ newNode->children.resize(this->lowerLevelNodesNumber[i] *
+ this->lowerLevelPortsNumber[i]);
+ if (i != this->levels - 1) {
+ newNode->parents.resize(this->upperLevelNodesNumber[i + 1]);
+ }
+ this->nodes.push_back(newNode);
+ }
+ }
+}
+
+void AsClusterFatTree::generateLabels() {
+ // TODO : check if nodesByLevel and nodes are filled
+ for (unsigned int i = 0 ; i < this->levels ; i++) {
+ std::vector<int> maxLabel(this->nodesByLevel[i]);
+ std::vector<int> currentLabel(this->nodesByLevel[i], 0);
+ unsigned int k = 0;
+ for (unsigned int j = 0 ; j < this->nodesByLevel[i] ; j++) {
+ maxLabel[j] = j > i ?
+ this->lowerLevelNodesNumber[i] : this->upperLevelNodesNumber[i];
+ }
+
+ for (unsigned int j = 0 ; j < this->nodesByLevel[i] ; j++) {
+ this->nodes[k]->label.assign(currentLabel.begin(), currentLabel.end());
+
+ int remainder = 0;
+
+ do {
+ int pos = currentLabel.size() - 1;
+ remainder = ++currentLabel[pos] / maxLabel[pos];
+ currentLabel[pos] = currentLabel[pos] % maxLabel[pos];
+ --pos;
+ }
+ while(remainder != 0);
+ k++;
+ }
+ }
}
+int AsClusterFatTree::getLevelPosition(const unsigned int level) {
+ if (level > this->levels - 1) {
+ // Well, that should never happen. Maybe should we throw instead.
+ return -1;
+ }
+ int tempPosition = 0;
+
+ for (unsigned int i = 0 ; i < level ; i++) {
+ tempPosition += this->nodesByLevel[i];
+ }
+ return tempPosition;
+}
+
+void AsClusterFatTree::addComputeNodes(std::vector<int> const& id) {
+ FatTreeNode* newNode;
+ for (size_t i = 0 ; i < id.size() ; i++) {
+ newNode = new FatTreeNode(id[i], 0, i);
+ newNode->parents.resize(this->upperLevelNodesNumber[0] * this->lowerLevelPortsNumber[i]);
+ this->nodes.push_back(newNode);
+ }
+}
+
+void AsClusterFatTree::addLink(sg_platf_cluster_cbarg_t cluster,
+ FatTreeNode *parent, unsigned int parentPort,
+ FatTreeNode *child, unsigned int childPort) {
+ using std::make_pair;
+
+
+ FatTreeLink *newLink;
+ newLink = new FatTreeLink(cluster, parent, child);
+
+ parent->children[parentPort] = newLink;
+ child->parents[childPort] = newLink;
+
+ this->links.insert(make_pair(make_pair(parent->id, child->id), newLink));
+
+
+
+}
void AsClusterFatTree::parse_specific_arguments(sg_platf_cluster_cbarg_t
cluster) {
std::vector<string> parameters;
std::vector<string> tmp;
boost::split(parameters, cluster->topo_parameters, boost::is_any_of(";"));
-
+
+
+ // TODO : we have to check for zeros and negative numbers, or it might crash
if (parameters.size() != 4){
- surf_parse_error("Fat trees are defined by the levels number et 3 vectors,"
- " see the documentation for more informations");
+ surf_parse_error("Fat trees are defined by the levels number and 3 vectors"
+ ", see the documentation for more informations");
// Well, there's no doc, yet
}
// The first parts of topo_parameters should be the levels number
- this->levels = std::atoi(tmp[0].c_str());
-
+ this->levels = std::atoi(tmp[0].c_str()); // stoi() only in C++11...
+
// Then, a l-sized vector standing for the childs number by level
boost::split(tmp, parameters[1], boost::is_any_of(","));
if(tmp.size() != this->levels) {
- surf_parse_error("Fat trees are defined by the levels number et 3 vectors,"
- " see the documentation for more informations");
+ surf_parse_error("Fat trees are defined by the levels number and 3 vectors"
+ ", see the documentation for more informations");
}
- for(unsigned int i = 0 ; i < tmp.size() ; i++){
+ for(size_t i = 0 ; i < tmp.size() ; i++){
this->lowerLevelNodesNumber.push_back(std::atoi(tmp[i].c_str()));
}
// Then, a l-sized vector standing for the parents number by level
- boost::split(tmp, parameters[2], boost::is_any_of(","));
+ boost::split(tmp, parameters[2], boost::is_any_of(","));
if(tmp.size() != this->levels) {
- surf_parse_error("Fat trees are defined by the levels number et 3 vectors,"
- " see the documentation for more informations");
+ surf_parse_error("Fat trees are defined by the levels number and 3 vectors"
+ ", see the documentation for more informations");
}
- for(unsigned int i = 0 ; i < tmp.size() ; i++){
+ for(size_t i = 0 ; i < tmp.size() ; i++){
this->upperLevelNodesNumber.push_back(std::atoi(tmp[i].c_str()));
}
// Finally, a l-sized vector standing for the ports number with the lower level
boost::split(tmp, parameters[3], boost::is_any_of(","));
if(tmp.size() != this->levels) {
- surf_parse_error("Fat trees are defined by the levels number et 3 vectors,"
- " see the documentation for more informations");
+ surf_parse_error("Fat trees are defined by the levels number and 3 vectors"
+ ", see the documentation for more informations");
}
- for(unsigned int i = 0 ; i < tmp.size() ; i++){
+ for(size_t i = 0 ; i < tmp.size() ; i++){
this->lowerLevelPortsNumber.push_back(std::atoi(tmp[i].c_str()));
}
}
+
+
+void AsClusterFatTree::generateDotFile(const string& filename) const {
+ ofstream file;
+ /* Maybe should we get directly a char*, as open takes strings only beginning
+ * with C++11...
+ */
+ file.open(filename.c_str(), ios::out | ios::trunc);
+ if(file.is_open()) {
+ // That could also be greatly clarified with C++11
+ std::map<std::pair<int,int>,FatTreeLink*>::const_iterator iter;
+ file << "graph AsClusterFatTree {\n";
+ for (iter = this->links.begin() ; iter != this->links.end() ; iter++ ) {
+ file << iter->second->source->id
+ << " -- "
+ << iter->second->destination->id
+ << ";\n";
+ }
+ file << "}";
+ file.close();
+ }
+ else {
+ std::cerr << "Unable to open file " << filename << std::endl;
+ return;
+ }
+}
+
+FatTreeNode::FatTreeNode(int id, int level, int position) : id(id),
+ level(level),
+ position(position){}
+
+FatTreeLink::FatTreeLink(sg_platf_cluster_cbarg_t cluster, FatTreeNode *source,
+ FatTreeNode *destination) : source(source),
+ destination(destination) {
+ static int uniqueId = 0;
+ s_sg_platf_link_cbarg_t linkTemplate;
+ linkTemplate.bandwidth = cluster->bw;
+ linkTemplate.latency = cluster->lat;
+ linkTemplate.state = SURF_RESOURCE_ON;
+ linkTemplate.policy = cluster->sharing_policy; // Maybe should we do sthg with that ?
+
+
+ NetworkLink* link;
+ linkTemplate.id = bprintf("link_from_%d_to_%d_%d_UP", source->id, destination->id, uniqueId);
+ sg_platf_new_link(&linkTemplate);
+ link = (NetworkLink*) xbt_lib_get_or_null(link_lib, linkTemplate.id, SURF_LINK_LEVEL);
+ this->linkUp = link; // check link?
+ linkTemplate.id = bprintf("link_from_%d_to_%d_%d_DOWN", source->id, destination->id, uniqueId);
+ sg_platf_new_link(&linkTemplate);
+ link = (NetworkLink*) xbt_lib_get_or_null(link_lib, linkTemplate.id, SURF_LINK_LEVEL);
+ this->linkDown = link; // check link ?
+
+ uniqueId++;
+
+}
