/*

* Copyright (C) 2016 - 2018 Intel Corporation.

* All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions are met:

* 1. Redistributions of source code must retain the above copyright notice(s),

*    this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright notice(s),

*    this list of conditions and the following disclaimer in the documentation

*    and/or other materials provided with the distribution.

*

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY EXPRESS

* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO

* EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY DIRECT, INDIRECT,

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*/

#include "common.h"

#include "allocator_perf_tool/HugePageUnmap.hpp"

#include "allocator_perf_tool/HugePageOrganizer.hpp"

#include "TimerSysTime.hpp"

#include "Thread.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

            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

            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();

}