Function TestDefragmentationFull

src/Tests.cpp:2466–2531

}

void TestDefragmentationFull()
{
    wprintf(L"Test defragmentation full\n");

    std::vector<AllocInfo> allocations;

    // Create initial allocations.
    for(size_t i = 0; i < 400; ++i)
    {
        AllocInfo allocation;
        CreateAllocation(allocation);
        allocations.push_back(allocation);
    }

    // Delete random allocations
    const size_t allocationsToDeletePercent = 80;
    size_t allocationsToDelete = allocations.size() * allocationsToDeletePercent / 100;
    for(size_t i = 0; i < allocationsToDelete; ++i)
    {
        size_t index = (size_t)rand() % allocations.size();
        DestroyAllocation(allocations[index]);
        allocations.erase(allocations.begin() + index);
    }
    //ValidateAllocationsData(allocations.data(), allocations.size()); // Ultra-slow
    //SaveAllocatorStatsToFile(L"Before.csv");

    {
        std::vector<VmaAllocation> vmaAllocations(allocations.size());
        for(size_t i = 0; i < allocations.size(); ++i)
            vmaAllocations[i] = allocations[i].m_Allocation;

        const size_t nonMovablePercent = 0;
        size_t nonMovableCount = vmaAllocations.size() * nonMovablePercent / 100;
        for(size_t i = 0; i < nonMovableCount; ++i)
        {
            size_t index = (size_t)rand() % vmaAllocations.size();
            vmaAllocations.erase(vmaAllocations.begin() + index);
        }

        // Set data for defragmentation retrieval
        for (auto& alloc : allocations)
            vmaSetAllocationUserData(g_hAllocator, alloc.m_Allocation, &alloc);

        VmaDefragmentationInfo defragmentationInfo = {};
        defragmentationInfo.flags = VMA_DEFRAGMENTATION_FLAG_ALGORITHM_FULL_BIT;

        time_point begTime = std::chrono::high_resolution_clock::now();

        VmaDefragmentationStats stats;
        Defragment(defragmentationInfo, &stats);

        float defragmentDuration = ToFloatSeconds(std::chrono::high_resolution_clock::now() - begTime);

        wprintf(L"  Moved allocations %u, bytes %llu\n", stats.allocationsMoved, stats.bytesMoved);
        wprintf(L"  Freed blocks %u, bytes %llu\n", stats.deviceMemoryBlocksFreed, stats.bytesFreed);
        wprintf(L"  Time: %.2f s\n", defragmentDuration);

        //wchar_t fileName[MAX_PATH];