[Lemon-commits] [lemon_svn] alpar: r950 - hugo/trunk/src/benchmark

[Lemon SVN]

Author: alpar
Date: Tue Jul 13 09:19:34 2004
New Revision: 950

Added:
   hugo/trunk/src/benchmark/
   hugo/trunk/src/benchmark/graph-bench.cc

Log:
Benchmarks


Added: hugo/trunk/src/benchmark/graph-bench.cc
==============================================================================
--- (empty file)
+++ hugo/trunk/src/benchmark/graph-bench.cc	Tue Jul 13 09:19:34 2004
@@ -0,0 +1,83 @@
+#include<math.h>
+#include<hugo/list_graph.h>
+#include<hugo/time_measure.h>
+#include<iostream>
+#include<sage_graph.h>
+
+using namespace hugo;
+
+///An experimental typedef factory
+#define GRAPH_TYPEDEF_FACTORY(Graph) \
+   typedef typename Graph::   Node      Node;\
+   typedef typename Graph::   NodeIt    NodeIn;\
+   typedef typename Graph::   Edge      Edge;\
+   typedef typename Graph::   EdgeIt    EdgeIt;\
+   typedef typename Graph:: InEdgeIt  InEdgeIt;\
+   typedef typename Graph::OutEdgeIt OutEdgeIt;
+ 
+
+///A primitive primtest
+bool isPrim(int n)
+{
+  if(n%2) {
+    for(int k=3;n/k>=k;k+=2)
+      if(!(n%k)) return false;
+    return true;
+  }
+  return false;
+}
+
+///Finds the smallest prime not less then \c n.
+int nextPrim(int n)
+{
+  for(n+=!(n%2);!isPrim(n);n+=2) ;
+  return n;
+}
+
+///Makes a full graph by adding and deleting a lot of edges;
+
+///\param n Number of nodes.
+///\param rat The funcion will make \f$rat\timesn^2\f$ edge addition and
+///\f$(rat-1)\timesn^2\f$ deletion.
+///\param p Tuning parameters.
+///\warning \c rat, \c p, and \c n must be pairwise relative primes. 
+template <class Graph>
+void makeFullGraph(int n, int rat, int p)
+{
+  GRAPH_TYPEDEF_FACTORY(Graph);
+
+  Graph G;
+  
+  Node nodes[n];
+  for(int i=0;i<n;i++) nodes[i]=G.addNode();
+  
+  Edge equ[rat];
+  
+  unsigned long long int count;
+  
+  for(count=0;count<rat;count++) {
+    equ[count%rat]=G.addEdge(nodes[(count*p)%n],nodes[(count*p/n)%n]);
+  }
+  for(;(count%rat)||((count*p)%n)||((count*p/n)%n);count++) {
+    //    if(!(count%1000000)) fprintf(stderr,"%d\r",count);
+    if(count%rat) G.erase(equ[count%rat]);
+    equ[count%rat]=G.addEdge(nodes[(count*p)%n],nodes[(count*p/n)%n]);
+  }
+  std::cout << "Added " << count
+	    << " ( " << n << "^2 * " << rat << " ) edges\n";
+  //  for(int i=0;1;i++) ;
+}
+
+int main()
+{
+  std::cout << "START: n="  << nextPrim(1000) << " rat="
+	    << nextPrim(300) << " p=" << nextPrim(100) << '\n';
+  hugo::Timer T;
+  makeFullGraph<ListGraph>(nextPrim(1000),nextPrim(300),nextPrim(100));
+  std::cout << T  << '\n';
+  std::cout << "START: n="  << nextPrim(1000) << " rat="
+	    << nextPrim(300) << " p=" << nextPrim(100) << '\n';
+  T.reset();
+  makeFullGraph<ListGraph>(nextPrim(100),nextPrim(30000),nextPrim(150));
+  std::cout << T  << '\n';
+}