benchmark/hcube.cc
author deba
Mon, 03 Oct 2005 10:18:38 +0000
changeset 1698 755cdc461ddd
parent 1632 93ac8c521fe5
child 1756 b1f441f24d08
permissions -rw-r--r--
Small functions for discovering graph topology
     1 // -*- mode:C++ -*-
     2 
     3 #include<cmath>
     4 #include<lemon/list_graph.h>
     5 #include<lemon/smart_graph.h>
     6 #include<lemon/dijkstra.h>
     7 #include<lemon/preflow.h>
     8 
     9 #include"bench_tools.h"
    10 
    11 using namespace std;
    12 using namespace lemon;
    13 
    14 inline int numOfOnes(int n,int dim)
    15 {
    16   int s=0;
    17   for(int i=0;i<dim;i++) {
    18     s+=n%2;
    19     n>>=1;
    20   }
    21   return s;
    22 }
    23 
    24 inline int numOfZeros(int n,int dim)
    25 {
    26   int s=dim;
    27   for(int i=0;i<dim;i++) {
    28     s-=n&1;
    29     n>>=1;
    30   }
    31   return s;
    32 }
    33 
    34 int main(int argc, char *argv[])
    35 {
    36   //  typedef ListGraph Graph;
    37   typedef SmartGraph Graph;
    38 
    39   ///\bug GRAPH_TYPEDEF_FACTORY(Graph);
    40   GRAPH_TYPEDEF_FACTORY_NOTYPENAME(Graph);
    41 
    42   Graph G;
    43   
    44   Timer T;
    45   
    46   if(argc!=2) {
    47     cout << "Usage: " << argv[0] << " dim\n";
    48     return 1;
    49   }
    50   
    51   int dim=atoi(argv[1]);
    52   
    53 //   cout << "Creating Hipercube ("<< (1<<dim) << " nodes, "
    54 //        << dim*(1<<dim) << " edges):";
    55 
    56   T.reset();
    57   vector<Node> nodes;
    58   addBiDirHyperCube(G,dim,nodes);
    59 
    60   PrintTime("GENGRAPH",T);
    61 
    62   T.reset();
    63   Graph::EdgeMap<int> map(G);
    64   for(int i=0;i<5;i++) {
    65     Primes P;
    66     for(int i=0;i<dim*(1<<dim);i++) P();
    67     
    68     //  for(EdgeIt e(G);G.valid(e);G.next(e)) map[e]=P();
    69 
    70     ///\todo It must have been commented out because of
    71     ///setToId
    72 //     Edge te;
    73 //     for(int i=0;i<dim*(1<<dim);i++) {
    74 //       te.setToId(((long long int)(i)*93505)%(dim*(1<<dim)));
    75 //       //    map[Edge(((long long int)(i)*2987)%(dim*(1<<dim)))]=P();
    76 //       map[te]=P();
    77 //     }
    78     
    79 //     for(int i=0;i<(1<<dim);i++) {
    80 //       int mul= (1<<(numOfZeros(i,dim)/4));
    81 //       for(OutEdgeIt e(G,nodes[i]);G.valid(e);G.next(e))
    82 // 	map[e]*=mul;
    83 //     }
    84   }
    85   
    86   PrintTime("GENLENGTHS",T);
    87 
    88   T.reset();
    89   {
    90     Dijkstra<Graph> Dij(G,map);
    91     for(int i=0;i<10;i++)
    92       Dij.run(nodes[0]);
    93   }
    94   PrintTime("DIJKSTRA",T);
    95 
    96   T.reset();
    97   {
    98    Graph::EdgeMap<int> flow(G);
    99    
   100     Preflow<Graph,int> MF(G,nodes[0],nodes[1<<dim-1],map,flow);
   101     for(int i=0;i<10;i++)
   102       MF.run(MF.NO_FLOW);
   103   }
   104   PrintTime("PREFLOW",T);
   105 
   106 }