further method splitup for profiling
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@ -4,7 +4,7 @@ SUCC=()
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FAILED=()
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while read -r instance opt; do
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linecount=$(./build/main $GRAPHS/$instance | wc -l)
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linecount=$(./cmake-build-release/matching $GRAPHS/$instance | wc -l)
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result=$(($linecount - 1))
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if [ "$result" -eq "$opt" ];
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then
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@ -1,6 +1,7 @@
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#include "edmonds.h"
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#include <iostream>
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#include <stack>
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#include <tuple>
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using namespace ED;
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@ -123,11 +124,9 @@ void augment(Graph & graph, std::vector<NodeId> const & x_path, std::vector<Node
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collect_exposed_vertices(graph, outer_unvisited_nodes);
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}
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void contract_blossom(Graph & graph, std::vector<NodeId> const & x_path, std::vector<NodeId> const & y_path,
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std::stack<NodeId> & outer_unvisited_nodes)
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__attribute__((noinline))
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std::tuple<NodeId, size_type, size_type> find_blossom_root_id(Graph const & graph, std::vector<NodeId> const & x_path, std::vector<NodeId> const & y_path)
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{
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//std::cout << "Contract blossom" << std::endl;
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// Paths are not disjoint -> shrink blossom
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size_t distance_from_x = x_path.size() - 1;
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size_t distance_from_y = y_path.size() - 1;
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while (distance_from_x > 0 and distance_from_y > 0 and \
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@ -143,9 +142,16 @@ void contract_blossom(Graph & graph, std::vector<NodeId> const & x_path, std::ve
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++distance_from_y;
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};
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// found first vertex fixed by rho
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NodeId blossom_root_id = x_path[distance_from_x];
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return { x_path[distance_from_x], distance_from_x, distance_from_y };
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}
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// Update φ along the paths to encode the ear decomposition
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__attribute__((noinline))
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void update_phi_along_blossom_paths(Graph & graph, std::vector<NodeId> const & x_path, std::vector<NodeId> const & y_path,
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std::tuple<NodeId, size_type, size_type> const & blossom_root)
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{
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auto const [blossom_root_id, distance_from_x, distance_from_y] = blossom_root;
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// Update φ along the paths to encode the ear decomposition
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for (size_t i = 1; i <= distance_from_x; i += 2)
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{
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if (graph.rho(graph.phi(x_path[i])) != blossom_root_id)
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@ -153,6 +159,7 @@ void contract_blossom(Graph & graph, std::vector<NodeId> const & x_path, std::ve
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graph.node(graph.phi(x_path[i])).phi = x_path[i];
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}
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}
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for (size_t i = 1; i <= distance_from_y; i += 2)
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{
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if (graph.rho(graph.phi(y_path[i])) != blossom_root_id)
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@ -161,7 +168,7 @@ void contract_blossom(Graph & graph, std::vector<NodeId> const & x_path, std::ve
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}
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}
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// Link x and y
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// Link x and y
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if (graph.rho(x_path.front()) != blossom_root_id)
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{
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graph.node(x_path.front()).phi = y_path.front();
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@ -170,13 +177,20 @@ void contract_blossom(Graph & graph, std::vector<NodeId> const & x_path, std::ve
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{
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graph.node(y_path.front()).phi = x_path.front();
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}
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}
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// Update root indices. We have to do this for all vertices v with
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// ρ(v) in the paths from x or y to r
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// We update ρ(v) first for the paths themselves, and then 'contract' ρ
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// by updating ρ(v) to r for all vertices where ρ(ρ(v)) = r
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// Also, while walking along the paths, we can add all vertices (which are now outer)
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// to the stack.
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__attribute__((noinline))
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void update_rho(Graph & graph, std::vector<NodeId> const & x_path, std::vector<NodeId> const & y_path,
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std::tuple<NodeId, size_type, size_type> const & blossom_root_description,
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std::stack<NodeId> & outer_unvisited_nodes)
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{
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// Update root indices. We have to do this for all vertices v with
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// ρ(v) in the paths from x or y to r
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// We update ρ(v) first for the paths themselves, and then 'contract' ρ
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// by updating ρ(v) to r for all vertices where ρ(ρ(v)) = r
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// Also, while walking along the paths, we can add all vertices (which are now outer)
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// to the stack.
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auto const [blossom_root_id, distance_from_x, distance_from_y] = blossom_root_description;
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for (size_t i = 0; i <= distance_from_x; ++i)
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{
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graph.node(x_path[i]).rho = blossom_root_id;
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@ -194,7 +208,7 @@ void contract_blossom(Graph & graph, std::vector<NodeId> const & x_path, std::ve
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}
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}
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// Iterating over whole graph.
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// Iterating over whole graph.
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for (NodeId node_id = 0; node_id < graph.num_nodes(); ++node_id)
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{
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if (graph.rho(graph.rho(node_id)) == blossom_root_id)
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@ -202,7 +216,18 @@ void contract_blossom(Graph & graph, std::vector<NodeId> const & x_path, std::ve
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graph.node(node_id).rho = blossom_root_id;
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}
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}
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//check_integrity(graph);
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}
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__attribute__((noinline))
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void contract_blossom(Graph & graph, std::vector<NodeId> const & x_path, std::vector<NodeId> const & y_path,
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std::stack<NodeId> & outer_unvisited_nodes)
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{
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//std::cout << "Contract blossom" << std::endl;
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std::tuple<NodeId, size_type, size_type> const blossom_root_description = find_blossom_root_id(graph, x_path, y_path);
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update_phi_along_blossom_paths(graph, x_path, y_path, blossom_root_description);
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//check_integrity(graph);
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update_rho(graph, x_path, y_path, blossom_root_description, outer_unvisited_nodes);
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}
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void maximum_matching_from_initial_matching(Graph & graph)
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@ -240,11 +265,13 @@ void maximum_matching_from_initial_matching(Graph & graph)
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if (x_path.back() != y_path.back())
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{
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// paths are disjoint -> can augment
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augment(graph, x_path, y_path, outer_unvisited_nodes);
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break;
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}
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else
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{
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// Paths are not disjoint -> contract the new blossom
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contract_blossom(graph, x_path, y_path, outer_unvisited_nodes);
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}
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}
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