refactored perforamnce tests

performance/performance_create_prealloc.cpp

@@ -0,0 +1,118 @@
+
+//          Copyright Oliver Kowalke 2009.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+#include <cstdlib>
+#include <iostream>
+#include <stdexcept>
+
+#include <boost/chrono.hpp>
+#include <boost/coroutine/all.hpp>
+#include <boost/cstdint.hpp>
+#include <boost/program_options.hpp>
+
+#include "bind_processor.hpp"
+#include "clock.hpp"
+#include "cycle.hpp"
+#include "preallocated_stack_allocator.hpp"
+
+typedef preallocated_stack_allocator< 8 * 1024 > stack_allocator;
+
+boost::coroutines::flag_fpu_t preserve_fpu = boost::coroutines::fpu_not_preserved;
+boost::uint64_t jobs = 1000;
+
+void fn( boost::coroutines::coroutine< void >::push_type & c)
+{ while ( true) c(); }
+
+duration_type measure_time()
+{
+    stack_allocator stack_alloc( jobs + 1);
+
+    // cache warum-up
+    boost::coroutines::coroutine< void >::pull_type c( fn,
+            boost::coroutines::attributes( stack_allocator::default_stacksize(), preserve_fpu),
+            stack_alloc);
+
+    time_point_type start( clock_type::now() );
+    for ( std::size_t i = 0; i < jobs; ++i) {
+        boost::coroutines::coroutine< void >::pull_type c( fn,
+            boost::coroutines::attributes( stack_allocator::default_stacksize(), preserve_fpu),
+            stack_alloc);
+    }
+    duration_type total = clock_type::now() - start;
+    total -= overhead_clock(); // overhead of measurement
+    total /= jobs;  // loops
+
+    return total;
+}
+
+# ifdef BOOST_CONTEXT_CYCLE
+cycle_type measure_cycles()
+{
+    stack_allocator stack_alloc( jobs + 1);
+
+    // cache warum-up
+    boost::coroutines::coroutine< void >::pull_type c( fn,
+            boost::coroutines::attributes( stack_allocator::default_stacksize(), preserve_fpu),
+            stack_alloc);
+
+    cycle_type start( cycles() );
+    for ( std::size_t i = 0; i < jobs; ++i) {
+        boost::coroutines::coroutine< void >::pull_type c( fn,
+            boost::coroutines::attributes( stack_allocator::default_stacksize(), preserve_fpu),
+            stack_alloc);
+    }
+    cycle_type total = cycles() - start;
+    total -= overhead_cycle(); // overhead of measurement
+    total /= jobs;  // loops
+
+    return total;
+}
+# endif
+
+int main( int argc, char * argv[])
+{
+    try
+    {
+        bind_to_processor( 0);
+
+        bool preserve = false;
+        boost::program_options::options_description desc("allowed options");
+        desc.add_options()
+            ("help", "help message")
+            ("fpu,f", boost::program_options::value< bool >( & preserve), "preserve FPU registers")
+            ("jobs,j", boost::program_options::value< boost::uint64_t >( & jobs), "jobs to run");
+
+        boost::program_options::variables_map vm;
+        boost::program_options::store(
+                boost::program_options::parse_command_line(
+                    argc,
+                    argv,
+                    desc),
+                vm);
+        boost::program_options::notify( vm);
+
+        if ( vm.count("help") ) {
+            std::cout << desc << std::endl;
+            return EXIT_SUCCESS;
+        }
+
+        if ( preserve) preserve_fpu = boost::coroutines::fpu_preserved;
+
+        boost::uint64_t res = measure_time().count();
+        std::cout << "average of " << res << " nano seconds" << std::endl;
+#ifdef BOOST_CONTEXT_CYCLE
+        res = measure_cycles();
+        std::cout << "average of " << res << " cpu cycles" << std::endl;
+#endif
+
+        return EXIT_SUCCESS;
+    }
+    catch ( std::exception const& e)
+    { std::cerr << "exception: " << e.what() << std::endl; }
+    catch (...)
+    { std::cerr << "unhandled exception" << std::endl; }
+    return EXIT_FAILURE;
+}