src/benchmark/graph-bench.cc
author alpar
Wed, 21 Jul 2004 06:59:55 +0000
changeset 716 e7f13f60fcfd
parent 708 429dfcbbf47d
child 718 75d36edc6bc4
permissions -rw-r--r--
Turn on '-Wall' by default.
     1 #include<math.h>
     2 #include<hugo/list_graph.h>
     3 #include<hugo/time_measure.h>
     4 #include<iostream>
     5 
     6 #include"bench_tools.h"
     7 
     8 using namespace hugo;
     9 
    10 ///Makes a full graph by adding and deleting a lot of edges;
    11 
    12 ///\param n Number of nodes.
    13 ///\param rat The funcion will make \f$rat\timesn^2\f$ edge addition and
    14 ///\f$(rat-1)\timesn^2\f$ deletion.
    15 ///\param p Tuning parameters.
    16 ///\warning \c rat, \c p, and \c n must be pairwise relative primes. 
    17 template <class Graph>
    18 void makeFullGraph(int n, int rat, int p)
    19 {
    20   GRAPH_TYPEDEF_FACTORY(Graph);
    21 
    22   Graph G;
    23   
    24   //  Node nodes[n];
    25   std::vector<Node> nodes(n);
    26   for(int i=0;i<n;i++) nodes[i]=G.addNode();
    27   
    28   //Edge equ[rat];
    29   std::vector<Edge> equ(rat);
    30   
    31   unsigned long long int count;
    32   
    33   for(count=0;count<rat;count++) {
    34     equ[count%rat]=G.addEdge(nodes[(count*p)%n],nodes[(count*p/n)%n]);
    35   }
    36   for(;(count%rat)||((count*p)%n)||((count*p/n)%n);count++) {
    37     //    if(!(count%1000000)) fprintf(stderr,"%d\r",count);
    38     if(count%rat) G.erase(equ[count%rat]);
    39     equ[count%rat]=G.addEdge(nodes[(count*p)%n],nodes[(count*p/n)%n]);
    40   }
    41   std::cout << "Added " << count
    42 	    << " ( " << n << "^2 * " << rat << " ) edges\n";
    43   //  for(int i=0;1;i++) ;
    44 }
    45 
    46 int main()
    47 {
    48   std::cout << "START: n="  << nextPrim(1000) << " rat="
    49 	    << nextPrim(300) << " p=" << nextPrim(100) << '\n';
    50   hugo::Timer T;
    51   makeFullGraph<ListGraph>(nextPrim(1000),nextPrim(300),nextPrim(100));
    52   std::cout << T  << '\n';
    53   std::cout << "START: n="  << nextPrim(1000) << " rat="
    54 	    << nextPrim(300) << " p=" << nextPrim(100) << '\n';
    55   T.reset();
    56   makeFullGraph<ListGraph>(nextPrim(100),nextPrim(30000),nextPrim(150));
    57   std::cout << T  << '\n';
    58 }