#include <boost/algorithm/string/classification.hpp>
#include <iostream>
#include <fstream>
+#include <sstream>
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_fat_tree, surf, "Routing for fat trees");
-AsClusterFatTree::AsClusterFatTree() : levels(0) {}
+AS_t model_fat_tree_cluster_create(void)
+{
+ return new AsClusterFatTree();
+}
+
+AsClusterFatTree::AsClusterFatTree() : levels(0) {
+ XBT_DEBUG("Creating a new fat tree.");
+}
AsClusterFatTree::~AsClusterFatTree() {
for (unsigned int i = 0 ; i < this->nodes.size() ; i++) {
}
}
+bool AsClusterFatTree::isInSubTree(FatTreeNode *root, FatTreeNode *node) {
+ XBT_DEBUG("Is %d(%u,%u) in the sub tree of %d(%u,%u) ?", node->id, node->level, node->position, root->id, root->level, root->position);
+ if (root->level <= node->level) {
+ return false;
+ }
+ for (unsigned int i = 0 ; i < node->level ; i++) {
+ if(root->label[i] != node->label[i]) {
+ return false;
+ }
+ }
+
+ for (unsigned int i = root->level ; i < this->levels ; i++) {
+ if(root->label[i] != node->label[i]) {
+ return false;
+ }
+ }
+ return true;
+}
+
void AsClusterFatTree::getRouteAndLatency(RoutingEdgePtr src,
RoutingEdgePtr dst,
sg_platf_route_cbarg_t into,
double *latency) {
- // TODO
+ FatTreeNode *source, *destination, *currentNode;
+ std::vector<NetworkLink*> route;
+ std::map<int, FatTreeNode*>::const_iterator tempIter;
+ tempIter = this->computeNodes.find(src->getId());
+
+ // xbt_die -> assert
+ if (tempIter == this->computeNodes.end()) {
+ xbt_die("Could not find the source %s [%d] in the fat tree", src->getName(), src->getId());
+ }
+ source = tempIter->second;
+ tempIter = this->computeNodes.find(dst->getId());
+ if (tempIter == this->computeNodes.end()) {
+ xbt_die("Could not find the destination %s [%d] in the fat tree", src->getName(), src->getId());
+ }
+
+
+ destination = tempIter->second;
+ XBT_DEBUG("%d %d", src->getId(), source->id);
+ XBT_DEBUG("Get route and latency from '%s' [%d] to '%s' [%d] in a fat tree",
+ src->getName(), src->getId(), dst->getName(), dst->getId());
+
+ currentNode = source;
+
+ // up part
+ while (!isInSubTree(currentNode, destination)) {
+ int d, k; // as in d-mod-k
+ d = destination->position;
+
+ for (unsigned int i = 0 ; i < currentNode->level ; i++) {
+ d /= this->upperLevelNodesNumber[i];
+ }
+ k = this->upperLevelNodesNumber[currentNode->level];
+ d = d % k;
+ route.push_back(currentNode->parents[d]->upLink);
+
+ if(latency) {
+ *latency += currentNode->parents[d]->upLink->getLatency();
+ }
+ currentNode = currentNode->parents[d]->upNode;
+ }
+ XBT_DEBUG("%d(%u,%u) is in the sub tree of %d(%u,%u).", destination->id, destination->level, destination->position, currentNode->id, currentNode->level, currentNode->position);
+ // Down part
+ while(currentNode != destination) {
+ for(unsigned int i = 0 ; i < currentNode->children.size() ; i++) {
+ if(i % this->lowerLevelNodesNumber[currentNode->level - 1] ==
+ destination->label[currentNode->level - 1]) {
+ route.push_back(currentNode->children[i]->downLink);
+ if(latency) {
+ *latency += currentNode->children[i]->downLink->getLatency();
+ }
+ currentNode = currentNode->children[i]->downNode;
+ XBT_DEBUG("%d(%u,%u) is accessible through %d(%u,%u)", destination->id, destination->level, destination->position, currentNode->id, currentNode->level, currentNode->position);
+ }
+ }
+ }
+
+ for (unsigned int i = 0 ; i < route.size() ; i++) {
+ xbt_dynar_push_as(into->link_list, void*, route[i]);
+ }
+
}
/* 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) {
-
+void AsClusterFatTree::create_links(sg_platf_cluster_cbarg_t cluster){
if(this->levels == 0) {
return;
}
- this->nodesByLevel.resize(this->levels, 0);
+ this->generateSwitches();
+
+
+ if(XBT_LOG_ISENABLED(surf_route_fat_tree, xbt_log_priority_debug)) {
+ std::stringstream msgBuffer;
+
+ msgBuffer << "We are creating a fat tree of " << this->levels << " levels "
+ << "with " << this->nodesByLevel[0] << " processing nodes";
+ for (unsigned int i = 1 ; i <= this->levels ; i++) {
+ msgBuffer << ", " << this->nodesByLevel[i] << " switches at level " << i;
+ }
+ XBT_DEBUG(msgBuffer.str().c_str());
+ msgBuffer.str("");
+ msgBuffer << "Nodes are : ";
+
+ for (unsigned int i = 0 ; i < this->nodes.size() ; i++) {
+ msgBuffer << this->nodes[i]->id << "(" << this->nodes[i]->level << ","
+ << this->nodes[i]->position << ") ";
+ }
+ XBT_DEBUG(msgBuffer.str().c_str());
+ }
+
+
+ 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++) {
+ this->connectNodeToParents(cluster, this->nodes[k]);
+ k++;
+ }
+ }
+
+ if(XBT_LOG_ISENABLED(surf_route_fat_tree, xbt_log_priority_debug)) {
+ std::stringstream msgBuffer;
+ msgBuffer << "Links are : ";
+ for (unsigned int i = 0 ; i < this->links.size() ; i++) {
+ msgBuffer << "(" << this->links[i]->upNode->id << ","
+ << this->links[i]->downNode->id << ") ";
+ }
+ XBT_DEBUG(msgBuffer.str().c_str());
+ }
+
+
+}
+
+int AsClusterFatTree::connectNodeToParents(sg_platf_cluster_cbarg_t cluster,
+ FatTreeNode *node) {
+ std::vector<FatTreeNode*>::iterator currentParentNode = this->nodes.begin();
+ int connectionsNumber = 0;
+ const int level = node->level;
+ XBT_DEBUG("We are connecting node %d(%u,%u) to his parents.",
+ node->id, node->level, node->position);
+ currentParentNode += this->getLevelPosition(level + 1);
+ for (unsigned int i = 0 ; i < this->nodesByLevel[level + 1] ; i++ ) {
+ if(this->areRelated(*currentParentNode, node)) {
+ XBT_DEBUG("%d(%u,%u) and %d(%u,%u) are related,"
+ " with %u links between them.", node->id,
+ node->level, node->position, (*currentParentNode)->id,
+ (*currentParentNode)->level, (*currentParentNode)->position, this->lowerLevelPortsNumber[level]);
+ for (unsigned int j = 0 ; j < this->lowerLevelPortsNumber[level] ; j++) {
+ this->addLink(cluster, *currentParentNode, node->label[level] +
+ j * this->lowerLevelNodesNumber[level], node,
+ (*currentParentNode)->label[level] +
+ j * this->upperLevelNodesNumber[level]);
+ }
+ connectionsNumber++;
+ }
+ ++currentParentNode;
+ }
+ return connectionsNumber;
+}
+
+
+bool AsClusterFatTree::areRelated(FatTreeNode *parent, FatTreeNode *child) {
+ std::stringstream msgBuffer;
+
+ if(XBT_LOG_ISENABLED(surf_route_fat_tree, xbt_log_priority_debug)) {
+ msgBuffer << "Are " << child->id << "(" << child->level << ","
+ << child->position << ") <";
+
+ for (unsigned int i = 0 ; i < this->levels ; i++) {
+ msgBuffer << child->label[i] << ",";
+ }
+ msgBuffer << ">";
+
+ msgBuffer << " and " << parent->id << "(" << parent->level
+ << "," << parent->position << ") <";
+ for (unsigned int i = 0 ; i < this->levels ; i++) {
+ msgBuffer << parent->label[i] << ",";
+ }
+ msgBuffer << ">";
+ msgBuffer << " related ? ";
+ XBT_DEBUG(msgBuffer.str().c_str());
+
+ }
+ if (parent->level != child->level + 1) {
+ return false;
+ }
+
+ for (unsigned int i = 0 ; i < this->levels; i++) {
+ if (parent->label[i] != child->label[i] && i + 1 != parent->level) {
+ return false;
+ }
+ }
+ return true;
+}
+
+void AsClusterFatTree::generateSwitches() {
+ XBT_DEBUG("Generating switches.");
+ this->nodesByLevel.resize(this->levels + 1, 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("The number of provided nodes does not fit with the wanted topology."
+ " Please check your platform description (We need %d nodes, we 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++) {
+ for (unsigned int j = 0 ; j <= i ; j++) {
nodesInThisLevel *= this->upperLevelNodesNumber[j];
}
nodesInThisLevel *= this->lowerLevelNodesNumber[j];
}
- this->nodesByLevel[i] = nodesInThisLevel;
+ this->nodesByLevel[i+1] = 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 %zu)",
- nodesRequired, this->nodes.size());
- return;
- }
- // Nodes are totally ordered, by level and then by position, in this->nodes
+
+ // If we have to many compute nodes, we ditch them
+
+
+ // 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 + 1] ; j++) {
+ FatTreeNode* newNode;
+ newNode = new FatTreeNode(--k, i + 1, j);
+ XBT_DEBUG("We create the switch %d(%d,%d)", newNode->id, newNode->level, newNode->position);
+ newNode->children.resize(this->lowerLevelNodesNumber[i] *
+ this->lowerLevelPortsNumber[i]);
+ if (i != this->levels - 1) {
+ newNode->parents.resize(this->upperLevelNodesNumber[i + 1] * this->lowerLevelPortsNumber[i + 1]);
+ }
+ newNode->label.resize(this->levels);
+ this->nodes.push_back(newNode);
+ }
+ }
+}
+
+void AsClusterFatTree::generateLabels() {
+ XBT_DEBUG("Generating labels.");
+ // TODO : check if nodesByLevel and nodes are filled
+ std::vector<int> maxLabel(this->levels);
+ std::vector<int> currentLabel(this->levels);
+ unsigned int k = 0;
+ for (unsigned int i = 0 ; i <= this->levels ; i++) {
+ currentLabel.assign(this->levels, 0);
+ for (unsigned int j = 0 ; j < this->levels ; j++) {
+ maxLabel[j] = j + 1 > i ?
+ this->lowerLevelNodesNumber[j] : this->upperLevelNodesNumber[j];
+ }
+
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]);
+
+ if(XBT_LOG_ISENABLED(surf_route_fat_tree, xbt_log_priority_debug )) {
+ std::stringstream msgBuffer;
+
+ msgBuffer << "Assigning label <";
+ for (unsigned int l = 0 ; l < this->levels ; l++) {
+ msgBuffer << currentLabel[l] << ",";
+ }
+ msgBuffer << "> to " << k << " (" << i << "," << j <<")";
+
+ XBT_DEBUG(bprintf(msgBuffer.str().c_str()));
+ }
+ this->nodes[k]->label.assign(currentLabel.begin(), currentLabel.end());
+
+ bool remainder = true;
+
+ unsigned int pos = 0;
+ do {
+ std::stringstream msgBuffer;
+
+ ++currentLabel[pos];
+ if (currentLabel[pos] >= maxLabel[pos]) {
+ currentLabel[pos] = 0;
+ remainder = true;
+ }
+ else {
+ remainder = false;
+ }
+ if (!remainder) {
+ pos = 0;
+ }
+ else {
+ ++pos;
+ }
}
+ while(remainder && pos < this->levels);
k++;
}
}
}
-void AsClusterFatTree::getLevelPosition(const unsigned int level, int *position, int *size) {
- if (level > this->levels - 1) {
- *position = -1;
- *size = -1;
- return;
+
+int AsClusterFatTree::getLevelPosition(const unsigned int level) {
+ if (level > this->levels) {
+ // 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];
}
- *position = tempPosition;
- *size = this->nodesByLevel[level];
-}
-
-void AsClusterFatTree::addNodes(std::vector<int> const& id) {
- for (size_t i = 0 ; i < id.size() ; i++) {
- this->nodes.push_back(new FatTreeNode(id[i]));
- }
+ return tempPosition;
}
-void AsClusterFatTree::addLink(sg_platf_cluster_cbarg_t cluster, FatTreeNode *parent,
- FatTreeNode *child) {
+void AsClusterFatTree::addProcessingNode(int id) {
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);
+ static int position = 0;
+ FatTreeNode* newNode;
+ newNode = new FatTreeNode(id, 0, position++);
+ newNode->parents.resize(this->upperLevelNodesNumber[0] * this->lowerLevelPortsNumber[0]);
+ newNode->label.resize(this->levels);
+ this->computeNodes.insert(make_pair(id,newNode));
+ this->nodes.push_back(newNode);
+}
+void AsClusterFatTree::addLink(sg_platf_cluster_cbarg_t cluster,
+ FatTreeNode *parent, unsigned int parentPort,
+ FatTreeNode *child, unsigned int childPort) {
FatTreeLink *newLink;
+ newLink = new FatTreeLink(cluster, child, parent);
+ XBT_DEBUG("Creating a link between the parent (%d,%d,%u)"
+ " and the child (%d,%d,%u)", parent->level, parent->position,
+ parentPort, child->level, child->position, childPort);
+ parent->children[parentPort] = newLink;
+ child->parents[childPort] = newLink;
- newLink = new FatTreeLink(cluster, parent, child, this->lowerLevelPortsNumber[parent->level]);
- this->links.insert(make_pair(make_pair(parent->id, child->id), newLink));
+ this->links.push_back(newLink);
}
// The first parts of topo_parameters should be the levels number
- this->levels = std::atoi(tmp[0].c_str()); // stoi() only in C++11...
+ this->levels = std::atoi(parameters[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(","));
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
+ for (unsigned int i = 0 ; i < this->nodes.size() ; i++) {
+ file << this->nodes[i]->id;
+ if(this->nodes[i]->id < 0) {
+ file << " [shape=circle];\n";
+ }
+ else {
+ file << " [shape=hexagon];\n";
+ }
+ }
+
+ for (unsigned int i = 0 ; i < this->links.size() ; i++ ) {
+ file << this->links[i]->downNode->id
<< " -- "
- << iter->second->destination->id
+ << this->links[i]->upNode->id
<< ";\n";
- }
}
file << "}";
file.close();
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) {
+FatTreeLink::FatTreeLink(sg_platf_cluster_cbarg_t cluster, FatTreeNode *downNode,
+ FatTreeNode *upNode) : upNode(upNode),
+ downNode(downNode) {
+ static int uniqueId = 0;
s_sg_platf_link_cbarg_t linkTemplate;
+ memset(&linkTemplate, 0, sizeof(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);
+ linkTemplate.id = bprintf("link_from_%d_to_%d_%d", downNode->id, upNode->id, uniqueId);
+ sg_platf_new_link(&linkTemplate);
+ NetworkLink* link;
+ if (cluster->sharing_policy == SURF_LINK_FULLDUPLEX) {
+ std::string tmpID;
+ tmpID = std::string(linkTemplate.id) + "_UP";
+ link = (NetworkLink*) xbt_lib_get_or_null(link_lib, tmpID.c_str(), SURF_LINK_LEVEL);
+ this->upLink = link; // check link?
+ tmpID = std::string(linkTemplate.id) + "_DOWN";
+ link = (NetworkLink*) xbt_lib_get_or_null(link_lib, tmpID.c_str(), SURF_LINK_LEVEL);
+ this->downLink = link; // check link ?
+ }
+ else {
link = (NetworkLink*) xbt_lib_get_or_null(link_lib, linkTemplate.id, SURF_LINK_LEVEL);
- this->linksDown.push_back(link); // check link ?
+ this->upLink = link;
+ this->downLink = link;
}
+ uniqueId++;
+
}
