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diff --git a/libstdc++-v3/testsuite/ext/mt_allocator/tune-1.cc b/libstdc++-v3/testsuite/ext/mt_allocator/tune-1.cc
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+++ b/libstdc++-v3/testsuite/ext/mt_allocator/tune-1.cc
@@ -0,0 +1,70 @@
+// 2004-08-25 Benjamin Kosnik <bkoz@redhat.com>
+//
+// Copyright (C) 2004, 2005, 2009 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 3, 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 COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <memory>
+#include <ext/mt_allocator.h>
+#include <testsuite_hooks.h>
+#include <testsuite_character.h>
+
+#ifdef __GTHREADS
+#define __cxxthread true
+#else
+#define __cxxthread false
+#endif
+
+// Tune characteristics. 
+// __common_pool_policy
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  using __gnu_cxx::__pool;
+  using __gnu_cxx::__common_pool_policy;
+
+  typedef __gnu_test::pod_int value_type;
+  typedef __common_pool_policy<__pool, __cxxthread> policy_type;
+  typedef __gnu_cxx::__mt_alloc<value_type, policy_type> allocator_type;
+  typedef __gnu_cxx::__pool_base::_Tune tune_type;
+
+  allocator_type a;
+  tune_type t_default = a._M_get_options();
+  tune_type t_opt(32, 5120, 32, 5120, 20, 10, false);
+  tune_type t_small(16, 1024, 32, 2048, 1, 10, false);
+
+  tune_type t1 = t_default;
+  a._M_set_options(t_opt);
+  tune_type t2 = a._M_get_options();
+  VERIFY( t1._M_align != t2._M_align );
+
+  allocator_type::pointer p1 = a.allocate(128);
+  allocator_type::pointer p2 = a.allocate(5128);
+  a._M_set_options(t_small);
+  tune_type t3 = a._M_get_options();  
+  VERIFY( t3._M_chunk_size != t_small._M_chunk_size );
+  VERIFY( t3._M_chunk_size == t_opt._M_chunk_size );
+
+  a.deallocate(p1, 128);
+  a.deallocate(p2, 5128);
+}
+
+int main()
+{
+  test01();
+  return 0;
+}