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//
// SerialTaskQueue_test.cpp
// DispatchProcessingDemo
//
// Created by Chris Jones on 9/27/11.
//
#include <iostream>
#include <sstream>
#include <catch.hpp>
#include <chrono>
#include <memory>
#include <atomic>
#include <iostream>
#include "oneapi/tbb/task.h"
#include "oneapi/tbb/global_control.h"
#include "oneapi/tbb/task_arena.h"
#include "FWCore/Concurrency/interface/SerialTaskQueueChain.h"
#include "FWCore/Concurrency/interface/FinalWaitingTask.h"
#include "FWCore/Concurrency/interface/WaitingTaskHolder.h"
using namespace std::chrono_literals;
TEST_CASE("SerialTaskQueueChain", "[SerialTaskQueueChain]") {
SECTION("push") {
std::atomic<unsigned int> count{0};
std::vector<std::shared_ptr<edm::SerialTaskQueue>> queues = {std::make_shared<edm::SerialTaskQueue>(),
std::make_shared<edm::SerialTaskQueue>()};
edm::SerialTaskQueueChain chain(queues);
{
oneapi::tbb::task_group group;
edm::FinalWaitingTask lastTask(group);
{
edm::WaitingTaskHolder lastHolder(group, &lastTask);
chain.push(group, [&count, lastHolder] {
REQUIRE(count++ == 0u);
std::this_thread::sleep_for(10us);
});
chain.push(group, [&count, lastHolder] {
REQUIRE(count++ == 1u);
std::this_thread::sleep_for(10us);
});
chain.push(group, [&count, lastHolder] {
REQUIRE(count++ == 2u);
std::this_thread::sleep_for(10us);
});
}
lastTask.wait();
REQUIRE(count == 3u);
while (chain.outstandingTasks() != 0)
;
}
}
SECTION("push one") {
std::atomic<unsigned int> count{0};
std::vector<std::shared_ptr<edm::SerialTaskQueue>> queues = {std::make_shared<edm::SerialTaskQueue>()};
edm::SerialTaskQueueChain chain(queues);
{
oneapi::tbb::task_group group;
edm::FinalWaitingTask lastTask(group);
{
edm::WaitingTaskHolder lastHolder(group, &lastTask);
chain.push(group, [&count, lastHolder] {
REQUIRE(count++ == 0u);
std::this_thread::sleep_for(10us);
});
chain.push(group, [&count, lastHolder] {
REQUIRE(count++ == 1u);
std::this_thread::sleep_for(10us);
});
chain.push(group, [&count, lastHolder] {
REQUIRE(count++ == 2u);
std::this_thread::sleep_for(10us);
});
}
lastTask.wait();
REQUIRE(count == 3u);
while (chain.outstandingTasks() != 0)
;
}
}
SECTION("stress test") {
std::vector<std::shared_ptr<edm::SerialTaskQueue>> queues = {std::make_shared<edm::SerialTaskQueue>(),
std::make_shared<edm::SerialTaskQueue>()};
REQUIRE(2 <= oneapi::tbb::this_task_arena::max_concurrency());
oneapi::tbb::task_arena arena(2);
arena.execute([&]() {
edm::SerialTaskQueueChain chain(queues);
unsigned int index = 100;
const unsigned int nTasks = 1000;
while (0 != --index) {
oneapi::tbb::task_group group;
edm::FinalWaitingTask lastTask(group);
std::atomic<unsigned int> count{0};
std::atomic<unsigned int> waitToStart{2};
{
edm::WaitingTaskHolder lastHolder(group, &lastTask);
group.run([&chain, &waitToStart, &group, &count, lastHolder, index] {
--waitToStart;
while (waitToStart.load() != 0)
;
std::ostringstream ss;
ss << "start task 1, index: " << index << "\n";
std::cout << ss.str() << std::flush;
for (unsigned int i = 0; i < nTasks; ++i) {
chain.push(group, [&count, lastHolder] { ++count; });
}
ss.str(std::string());
ss << "stop task 1, index: " << index << "\n";
std::cout << ss.str() << std::flush;
});
group.run([&chain, &waitToStart, &group, &count, lastHolder, index] {
--waitToStart;
while (waitToStart.load() != 0)
;
std::ostringstream ss;
ss << "start task 2, index: " << index << "\n";
std::cout << ss.str() << std::flush;
for (unsigned int i = 0; i < nTasks; ++i) {
chain.push(group, [&count, lastHolder] { ++count; });
}
ss.str(std::string());
ss << "stop task 2, index: " << index << "\n";
std::cout << ss.str() << std::flush;
});
}
std::cout << "Waiting for tasks to finish, index: " << index << "\n" << std::flush;
lastTask.wait();
REQUIRE(2 * nTasks == count);
}
CHECK(0 == chain.outstandingTasks());
while (chain.outstandingTasks() != 0)
;
});
}
}
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