#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,
// 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;
}
-
- // for (unsigned int i = 0 ; i < this->levels)
+ this->nodesByLevel.resize(this->levels, 0);
+ unsigned int nodesRequired = 0;
+
+
+ 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] = nodesInThisLevel;
+ nodesRequired += nodesInThisLevel;
+ }
+
+ if(nodesRequired > 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 %lu)",
+ nodesRequired, this->nodes.size());
+ return;
+ }
+ // Nodes are totally ordered, by level and then by position, in this->nodes
+ int k = 0;
+ for (unsigned int i = 0 ; i < this->levels ; i++) {
+ for (unsigned int j = 0 ; j < this->nodesByLevel[i] ; j++) {
+ this->nodes[k]->level = i;
+ this->nodes[k]->position = j;
+ if(i != 0) {
+ int position, size;
+ this->getLevelPosition(i - 1, &position, &size); // TODO : check position and size ?
+ /* We create the connexions between this nodes and all its parents
+ */
+ for (unsigned int l = this->upperLevelNodesNumber[i] * j ;
+ l < this->upperLevelNodesNumber[i] * (j + 1) ; l++)
+ this->addLink(cluster, this->nodes[position + l], this->nodes[k]);
+ }
+ k++;
+ }
+ }
}
+void AsClusterFatTree::getLevelPosition(const unsigned int level, int *position, int *size) {
+ if (level > this->levels - 1) {
+ *position = -1;
+ *size = -1;
+ return;
+ }
+ int tempPosition = 0;
+
+ for (unsigned int i = 0 ; i < level ; i++) {
+ tempPosition += this->nodesByLevel[i];
+ }
+ *position = tempPosition;
+ *size = this->nodesByLevel[level];
+}
+
+void AsClusterFatTree::addNodes(std::vector<int> const& id) {
+ for (unsigned int i = 0 ; i < id.size() ; i++) {
+ this->nodes.push_back(new FatTreeNode(id[i]));
+ }
+}
+
+void AsClusterFatTree::addLink(sg_platf_cluster_cbarg_t cluster, FatTreeNode *parent,
+ FatTreeNode *child) {
+ using std::make_pair;
+ if (parent->children.size() == this->nodesByLevel[parent->level] ||
+ child->parents.size() == this->nodesByLevel[child->level]) {
+ /* NB : This case should never happen, if this private function is not misused,
+ * so should we keep this test, keep it only for debug, throw an exception
+ * or get rid of it ? In all cases, anytime we get in there, code should be
+ * fixed
+ */
+ xbt_die("I've been asked to create a link that could not possibly exist");
+ return;
+ }
+
+ parent->children.push_back(child);
+ child->parents.push_back(parent);
+
+ FatTreeLink *newLink;
+ newLink = new FatTreeLink(cluster, parent, child, this->lowerLevelPortsNumber[parent->level]);
+ 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++){
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++){
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++){
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++ ) {
+ for (unsigned int j = 0 ; j < iter->second->ports ; j++) {
+ 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,
+ unsigned int ports) : ports(ports), source(source),
+ destination(destination) {
+ 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 ?
+
+ for(unsigned int i = 0 ; i < ports ; i++) {
+ NetworkLink* link;
+ linkTemplate.id = bprintf("link_from_%d_to_%d_%d_UP", source->id, destination->id, i);
+ sg_platf_new_link(&linkTemplate);
+ link = (NetworkLink*) xbt_lib_get_or_null(link_lib, linkTemplate.id, SURF_LINK_LEVEL);
+ this->linksUp.push_back(link); // check link?
+ linkTemplate.id = bprintf("link_from_%d_to_%d_%d_DOWN", source->id, destination->id, i);
+ sg_platf_new_link(&linkTemplate);
+ link = (NetworkLink*) xbt_lib_get_or_null(link_lib, linkTemplate.id, SURF_LINK_LEVEL);
+ this->linksDown.push_back(link); // check link ?
+ }
+}
