allocator_map_thread.cc: New test.

	libstdc++/13823
	* testsuite/performance/allocator_map_thread.cc: New test.

From-SVN: r76398

libstdc++-v3/ChangeLog

+2004-01-23  Loren J. Rittle  <ljrittle@acm.org>
+
+	libstdc++/13823
+	* testsuite/performance/allocator_map_thread.cc: New test.
+
 2004-01-22  Paolo Carlini  <pcarlini@suse.de>
 
 	* include/bits/locale_facets.tcc

libstdc++-v3/testsuite/performance/allocator_map_thread.cc

+// Copyright (C) 2004 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+/*
+ * The goal with this application is to compare the performance
+ * between different std::allocator implementations. The results are
+ * influenced by the underlying allocator in the "C" library, malloc.
+ */
+
+// libstdc++/13823 recast for this testing framework
+
+#include <map>
+#include <iostream>
+#include <typeinfo>
+#include <sstream>
+#include <cxxabi.h>
+#include <ext/mt_allocator.h>
+#include <ext/malloc_allocator.h>
+#include <testsuite_performance.h>
+
+using namespace std;
+using __gnu_cxx::malloc_allocator;
+using __gnu_cxx::__mt_alloc;
+
+// The number of iterations to be performed.
+int iterations;
+
+template<typename Container>
+  void*
+  do_loop(void* p = NULL)
+  {
+    try
+      {
+	for (int c = 0; c < 10; c++)
+	  {
+	    Container m;
+
+	    for (unsigned i = 0; i < iterations; ++i) 
+	      m[i] = i;
+	  }
+      }
+    catch(...)
+      {
+	// No point allocating all available memory, repeatedly.	
+      }
+  }
+
+template<typename Container>
+  void
+  calibrate_iterations()
+  {
+    int try_iterations = iterations = 10000;
+
+    __gnu_test::time_counter timer;
+    timer.start();
+    do_loop<Container>();
+    timer.stop();
+
+    double tics = timer.real_time();
+    double iterpc = iterations / tics; //iterations per clock
+    double xtics = 100; // works for linux 2gig x86
+    iterations = static_cast<int>(xtics * iterpc);
+  }
+
+template<typename Container>
+  void
+  test_container(Container obj)
+  {
+    using namespace __gnu_test;
+    int status;
+
+    time_counter time;
+    resource_counter resource;
+
+    clear_counters(time, resource);
+    start_counters(time, resource);
+    
+    pthread_t  t1, t2, t3, t4;
+    pthread_create(&t1, NULL, &do_loop<Container>, NULL);
+    pthread_create(&t2, NULL, &do_loop<Container>, NULL);
+    pthread_create(&t3, NULL, &do_loop<Container>, NULL);
+    pthread_create(&t4, NULL, &do_loop<Container>, NULL);
+
+    pthread_join(t1, NULL);
+    pthread_join(t2, NULL);
+    pthread_join(t3, NULL);
+    pthread_join(t4, NULL);
+
+    stop_counters(time, resource);
+ 
+    std::ostringstream comment;
+    comment << "iterations: " << iterations << '\t';
+    comment << "type: " << abi::__cxa_demangle(typeid(obj).name(),
+					       0, 0, &status);
+    report_header(__FILE__, comment.str());
+    report_performance(__FILE__, string(), time, resource);
+  }
+
+int main(void)
+{
+  calibrate_iterations<map<int, int> >();
+  test_container(map<int, int>());
+  test_container(map<int, int, less<const int>, malloc_allocator<int> >());
+  test_container(map<int, int, less<const int>,
+                     __mt_alloc< pair<const int, int> > >());
+
+  return 0;
+}