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// SPDX-License-Identifier: BSD-2-Clause
/* Copyright (C) 2016 - 2021 Intel Corporation. */
#include "common.h"
#include "Thread.hpp"
#include "TimerSysTime.hpp"
#include "allocator_perf_tool/HugePageOrganizer.hpp"
#include "allocator_perf_tool/HugePageUnmap.hpp"
/*
* This test was created because of the munmap() fail in jemalloc.
* There are two root causes of the error:
* - kernel bug (munmap() fails when the size is not aligned)
* - heap Manager doesn’t provide size aligned to 2MB pages for munmap()
* Test allocates 2000MB using Huge Pages
* (50threads*10operations*4MBalloc_size), but it needs extra Huge Pages due to
* overhead caused by heap management.
*/
class HugePageTest: public ::testing::Test
{
protected:
void run()
{
unsigned mem_operations_num = 10;
size_t threads_number = 50;
bool touch_memory = true;
size_t size_1MB = 1024 * 1024;
size_t alignment = 2 * size_1MB;
size_t alloc_size = 4 * size_1MB;
std::vector<Thread *> threads;
std::vector<Task *> tasks;
TimerSysTime timer;
timer.start();
// This bug occurs more frequently under stress of multithreaded
// allocations.
for (int i = 0; i < threads_number; i++) {
Task *task =
new HugePageUnmap(mem_operations_num, touch_memory, alignment,
alloc_size, HBW_PAGESIZE_2MB);
tasks.push_back(task);
threads.push_back(new Thread(task));
}
float elapsed_time = timer.getElapsedTime();
ThreadsManager threads_manager(threads);
threads_manager.start();
threads_manager.barrier();
threads_manager.release();
// task release
for (int i = 0; i < tasks.size(); i++) {
delete tasks[i];
}
RecordProperty("threads_number", threads_number);
RecordProperty("memory_operations_per_thread", mem_operations_num);
RecordProperty("elapsed_time", elapsed_time);
}
};
// Test passes when there is no crash.
TEST_F(HugePageTest, test_TC_MEMKIND_ext_UNMAP_HUGE_PAGE)
{
HugePageOrganizer huge_page_organizer(1024);
run();
}
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