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//
// SerialTaskQueue_test.cpp
// DispatchProcessingDemo
//
// Created by Chris Jones on 9/27/11.
//
#include <iostream>
#define CATCH_CONFIG_MAIN
#include <catch.hpp>
#include <chrono>
#include <memory>
#include <atomic>
#include <thread>
#include "oneapi/tbb/task_arena.h"
#include "FWCore/Concurrency/interface/WaitingTask.h"
#include "FWCore/Concurrency/interface/FinalWaitingTask.h"
#include "FWCore/Concurrency/interface/WaitingTaskHolder.h"
#include "FWCore/Concurrency/interface/SerialTaskQueue.h"
#include "FWCore/Concurrency/interface/FunctorTask.h"
using namespace std::chrono_literals;
TEST_CASE("SerialTaskQueue", "[SerialTaskQueue]") {
SECTION("push") {
std::atomic<unsigned int> count{0};
edm::SerialTaskQueue queue;
{
oneapi::tbb::task_group group;
edm::FinalWaitingTask lastTask(group);
{
edm::WaitingTaskHolder waitingTask(group, &lastTask);
queue.push(group, [&count, waitingTask] {
REQUIRE(count++ == 0u);
std::this_thread::sleep_for(10us);
});
queue.push(group, [&count, waitingTask] {
REQUIRE(count++ == 1u);
std::this_thread::sleep_for(10us);
});
queue.push(group, [&count, waitingTask] {
REQUIRE(count++ == 2u);
std::this_thread::sleep_for(10us);
});
}
lastTask.wait();
REQUIRE(count == 3u);
}
}
SECTION("pause") {
std::atomic<unsigned int> count{0};
edm::SerialTaskQueue queue;
{
queue.pause();
{
oneapi::tbb::task_group group;
edm::FinalWaitingTask lastTask(group);
queue.push(group, [&count, waitingTask = edm::WaitingTaskHolder(group, &lastTask)] { REQUIRE(count++ == 0u); });
std::this_thread::sleep_for(1000us);
REQUIRE(count == 0u);
queue.resume();
lastTask.wait();
REQUIRE(count == 1u);
}
{
oneapi::tbb::task_group group;
edm::FinalWaitingTask lastTask(group);
{
edm::WaitingTaskHolder waitingTask(group, &lastTask);
queue.push(group, [&count, &queue, waitingTask] {
queue.pause();
REQUIRE(count++ == 1u);
});
queue.push(group, [&count, waitingTask] { REQUIRE(count++ == 2u); });
queue.push(group, [&count, waitingTask] { REQUIRE(count++ == 3u); });
}
std::this_thread::sleep_for(100us);
REQUIRE(2u >= count);
queue.resume();
lastTask.wait();
REQUIRE(count == 4u);
}
}
}
SECTION("stress test") {
oneapi::tbb::task_group group;
edm::SerialTaskQueue queue;
unsigned int index = 100;
const unsigned int nTasks = 1000;
while (0 != --index) {
edm::FinalWaitingTask lastTask(group);
std::atomic<unsigned int> count{0};
std::atomic<bool> waitToStart{true};
{
edm::WaitingTaskHolder waitingTask(group, &lastTask);
group.run([&queue, &waitToStart, waitingTask, &count, &group] {
while (waitToStart.load()) {
}
for (unsigned int i = 0; i < nTasks; ++i) {
queue.push(group, [&count, waitingTask] { ++count; });
}
});
group.run([&queue, &waitToStart, waitingTask, &count, &group] {
waitToStart = false;
for (unsigned int i = 0; i < nTasks; ++i) {
queue.push(group, [&count, waitingTask] { ++count; });
}
});
}
lastTask.wait();
REQUIRE(2 * nTasks == count);
}
}
}
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