taeguk

#include <thread>
#include <chrono>
#include <hpx/dataflow.hpp>
void haaam(int& i)
{
    using namespace std::chrono_literals;
    std::this_thread::sleep_for(2s);
    std::cout << "[haaam] start" << std::endl;
    std::this_thread::sleep_for(2s);
    std::cout << "[haaam] end" << std::endl;

taeguk

[tkwon@bob1 hpx_build]$ make -j16 tests.performance.parallel_algorithms.local_.benchmark_is_heap
Scanning dependencies of target hpx_init
[  8%] Building CXX object src/CMakeFiles/hpx_init.dir/hpx_main.cpp.o
[  8%] Building CXX object src/CMakeFiles/hpx_init.dir/hpx_main_variables_map.cpp.o
[  8%] Building CXX object src/CMakeFiles/hpx_init.dir/hpx_main_winsocket.cpp.o
[  8%] Building CXX object src/CMakeFiles/hpx_init.dir/hpx_main_argc_argv.cpp.o
[  8%] Building CXX object src/CMakeFiles/hpx_init.dir/hpx_user_main.cpp.o
[  8%] Building CXX object src/CMakeFiles/hpx_init.dir/hpx_user_main_argc_argv.cpp.o
[  8%] Building CXX object src/CMakeFiles/hpx_init.dir/util/lightweight_test.cpp.o
[  8%] Building CXX object src/CMakeFiles/hpx_init.dir/main.cpp.o

taeguk

template <typename RandIter1, typename RandIter2,
            typename Comp, typename Proj1, typename Proj2,
        HPX_CONCEPT_REQUIRES_(
            hpx::traits::is_random_access_iterator<RandIter1>::value &&
            hpx::traits::is_random_access_iterator<RandIter2>::value)>
        std::pair<RandIter1, RandIter2>
        find_half_point(RandIter1 first1, RandIter1 last1,
            RandIter2 first2, RandIter2 last2, Comp& comp,
            Proj1& proj1, Proj2& proj2)
        {

taeguk

[tkwon@bob1 qqqq]$ module list
Currently Loaded Modulefiles:
  1) cmake/3.8.1               3) clang/3.8.1
  2) hwloc/1.11.3              4) boost/1.60.0-clang3.8.1
[tkwon@bob1 qqqq]$ !cm
cmake -DHPX_WITH_TOOLS=ON ~/hpx
-- The CXX compiler identification is Clang 3.8.1
-- The C compiler identification is Clang 3.8.1
-- Check for working CXX compiler: /opt/mn/clang/3.8.1/bin/clang++
-- Check for working CXX compiler: /opt/mn/clang/3.8.1/bin/clang++ -- works

taeguk

[tkwon@bob1 hpx_build]$ make -j16 tests.performance.parallel_algorithms.local_.benchmark_partition
[  9%] Built target hpx_init
[100%] Built target hpx
Scanning dependencies of target benchmark_partition_exe
[100%] Building CXX object tests/performance/parallel_algorithms/local/CMakeFiles/benchmark_partition_exe.dir/benchmark_partition.cpp.o
In file included from /home/tkwon/hpx/hpx/lcos/local/packaged_continuation.hpp:27:0,
                 from /home/tkwon/hpx/hpx/lcos/future.hpp:1483,
                 from /home/tkwon/hpx/hpx/runtime/actions/trigger.hpp:11,
                 from /home/tkwon/hpx/hpx/runtime/actions/continuation.hpp:14,
                 from /home/tkwon/hpx/hpx/runtime/actions/action_invoke_no_more_than.hpp:12,

taeguk

Chapter 6

Eliminate Copying on Function Return

void scalar_product(
    std::vector<int> const& v,
    int c,
 vector&amp; result) {

taeguk

// VS http://en.cppreference.com/w/cpp/algorithm/rotate
template <class ForwardIt>
ForwardIt rotate(ForwardIt first, ForwardIt n_first, ForwardIt last)
{
    if(first == n_first) return last;
    if(n_first == last) return first;
 
    ForwardIt next = n_first;
    
    do {

taeguk

[tkwon@bob1 hpx_build]$ ./bin/benchmark_unique_copy --vector_size 1000000 --hpx:threads 16 --test_count 10 --iterator_tag forward --random_range 1
-------------- Benchmark Config --------------
seed         : 1499787616
vector_size  : 1000000
random_range : 1
iterator_tag : forward
test_count   : 10
os threads   : 16
----------------------------------------------

taeguk

[tkwon@bob1 hpx_build]$ ./bin/benchmark_partition_copy --vector_size 100000000 --hpx:threads 16 --test_count 10 --iterator_tag forward
-------------- Benchmark Config --------------
seed         : 1499537609
vector_size  : 100000000
iterator_tag : forward
test_count   : 10
os threads   : 16
----------------------------------------------

* Preparing Benchmark...

taeguk

unowned pointer/reference -> raw pointer
master ownership -> unique_ptr