#include <atomic>
#include <benchmark/benchmark.h>
#include <thread>

using namespace std::literals;

std::atomic<std::size_t> v[10]; // sizeof(v[10]) = 80B

template<std::atomic<std::size_t> &a, std::atomic<std::size_t> &b>
void f(benchmark::State &state)
{
    for (auto _ : state)
    {
        std::atomic<bool> run = true;
        a = b = 0;
        std::jthread j1([&](){ while (run) ++a; }),
                     j2([&](){ while (run) ++b; });
        std::this_thread::sleep_for(100us);
        run = false;
    }
    state.counters.insert({{"a", a.load()}, {"b", b.load()}});
}

BENCHMARK(f<v[0], v[1]>); //    false sharing :(
BENCHMARK(f<v[0], v[9]>); // no false sharing :)

BENCHMARK_MAIN();