Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/src/boost/libs/coroutine/performance/symmetric/performance_create_protected.cpp b/src/boost/libs/coroutine/performance/symmetric/performance_create_protected.cpp
new file mode 100644
index 000000000..eb6520e73
--- /dev/null
+++ b/src/boost/libs/coroutine/performance/symmetric/performance_create_protected.cpp
@@ -0,0 +1,112 @@
+
+//          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"
+
+typedef boost::coroutines::protected_stack_allocator       stack_allocator;
+typedef boost::coroutines::symmetric_coroutine< void >     coro_type;
+
+boost::coroutines::flag_fpu_t preserve_fpu = boost::coroutines::fpu_not_preserved;
+boost::coroutines::flag_unwind_t unwind_stack = boost::coroutines::stack_unwind;
+boost::uint64_t jobs = 1000;
+
+void fn( coro_type::yield_type &) {}
+
+duration_type measure_time( duration_type overhead)
+{
+    stack_allocator stack_alloc;
+    boost::coroutines::attributes attrs( unwind_stack, preserve_fpu);
+
+    time_point_type start( clock_type::now() );
+    for ( std::size_t i = 0; i < jobs; ++i) {
+        coro_type::call_type c( fn, attrs, stack_alloc);
+    }
+    duration_type total = clock_type::now() - start;
+    total -= overhead; // overhead of measurement
+    total /= jobs;  // loops
+
+    return total;
+}
+
+# ifdef BOOST_CONTEXT_CYCLE
+cycle_type measure_cycles( cycle_type overhead)
+{
+    stack_allocator stack_alloc;
+
+    cycle_type start( cycles() );
+    for ( std::size_t i = 0; i < jobs; ++i) {
+        coro_type::call_type c( fn,
+            boost::coroutines::attributes( unwind_stack, preserve_fpu), stack_alloc);
+    }
+    cycle_type total = cycles() - start;
+    total -= overhead; // overhead of measurement
+    total /= jobs;  // loops
+
+    return total;
+}
+# endif
+
+int main( int argc, char * argv[])
+{
+    try
+    {
+        bool preserve = false, unwind = true, bind = false;
+        boost::program_options::options_description desc("allowed options");
+        desc.add_options()
+            ("help", "help message")
+            ("bind,b", boost::program_options::value< bool >( & bind), "bind thread to CPU")
+            ("fpu,f", boost::program_options::value< bool >( & preserve), "preserve FPU registers")
+            ("unwind,u", boost::program_options::value< bool >( & unwind), "unwind coroutine-stack")
+            ("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;
+        if ( ! unwind) unwind_stack = boost::coroutines::no_stack_unwind;
+        if ( bind) bind_to_processor( 0);
+
+        duration_type overhead_c = overhead_clock();
+        std::cout << "overhead " << overhead_c.count() << " nano seconds" << std::endl;
+        boost::uint64_t res = measure_time( overhead_c).count();
+        std::cout << "average of " << res << " nano seconds" << std::endl;
+#ifdef BOOST_CONTEXT_CYCLE
+        cycle_type overhead_y = overhead_cycle();
+        std::cout << "overhead " << overhead_y << " cpu cycles" << std::endl;
+        res = measure_cycles( overhead_y);
+        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;
+}