C++ (Cpp) allocator::get_statistics示例

示例#1

void	print_allocator_stat(const memory::allocator* allocator)
{
	const memory::statistics* stat = allocator->get_statistics();
	assert(stat != nullptr);

	size_t heap_alloc = 0;
	size_t heap_free = 0;
	for (size_t i = 0; i < stat->get_heap_count(); ++i)
	{
		const memory::heap_statistics_t* heap = stat->get_heap(i);
		assert(heap != nullptr);
		if (heap != nullptr)
		{
			::wprintf(L"heap[%u]: alloc: %u, free: %u\n", i, heap->alloc, heap->free);

			heap_alloc += heap->alloc;
			heap_free += heap->free;
		}
	}

	size_t lookaside_alloc = 0;
	size_t lookaside_free = 0;
	for (size_t i = 0; i < stat->get_cache_count(); ++i)
	{
		const memory::cache_statistics_t* cache = stat->get_cache(i);
		assert(cache != nullptr);
		if (cache != nullptr)
		{
			size_t cache_alloc = 0;
			size_t cache_free = 0;
			for (size_t j = 0; j < cache->count; ++j)
			{
				const memory::lookaside_statistics_t* lookaside = &cache->lookaside[j];
				cache_alloc += lookaside->alloc;
				cache_free += lookaside->free;
			}

			lookaside_alloc += cache_alloc;
			lookaside_free += cache_free;

			::wprintf(L"cache[%u]: alloc: %u, free: %u\n", i, cache_alloc, cache_free);
		}
	}

	::wprintf(L"\nheap(%u) alloc: %u, free: %u\n", stat->get_heap_count(), heap_alloc, heap_free);
	::wprintf(L"lookaside(%u) alloc: %u, free: %u\n", stat->get_cache_count(), lookaside_alloc, lookaside_free);
	::wprintf(L"total alloc: %u, total free: %u\n", heap_alloc + lookaside_alloc, heap_free + lookaside_free);
}

示例#2

文件： main.cpp 项目： astromaker/sandbox

int	main()
{
#if		defined(CRT_LFH)

	::wprintf(L"crt lfh\n");

	set_lfh();

#elif	defined(TBBMALLOC)

	::wprintf(L"tbbmalloc\n");

#elif	defined(TCMALLOC)

	::wprintf(L"tcmalloc\n");

#elif	defined(JEMALLOC)

	::wprintf(L"jemalloc\n");

	set_jemalloc();

#elif	defined(MS_CONCURRENCY)

	::wprintf(L"ms concurrency\n");

#elif	defined(MY_ALLOCATOR)

	::wprintf(L"my allocator\n");

	if (allocator.create(true, 0) == false)
	{
		::wprintf(L"allocator.create() failed.\n");
		return 0;
	}

#endif

	// for crt tbb tcmalloc
	char* dummy = new char[10];
	SecureZeroMemory(dummy, 10);

	::wprintf(L"start memory info\n");
	print_memory_info();

	HANDLE thread_handle[thread_count] = { nullptr, };

	ULONGLONG start = ::GetTickCount64();
	for (std::size_t i = 0; i < thread_count; ++i)
	{
		unsigned int id = 0;
		thread_handle[i] = reinterpret_cast< HANDLE >(::_beginthreadex(nullptr, 0, memory_alloc_test_thread_func, nullptr, 0, &id));
		if (thread_handle[i] == nullptr)
		{
			::wprintf(L"%llu: _beginthreadex failed.\n", i);
		}
	}

	::WaitForMultipleObjects(thread_count, thread_handle, TRUE, INFINITE);

	ULONGLONG run_time = ::GetTickCount64() - start;
	::wprintf(L"run time: %llu\n", run_time);

	for (std::size_t i = 0; i < thread_count; ++i)
	{
		if (thread_handle[i] != nullptr)
		{
			::CloseHandle(thread_handle[i]);
			thread_handle[i] = nullptr;
		}
	}

	delete[] dummy;
	dummy = nullptr;

	::wprintf(L"end memory info\n");
	print_memory_info();

#if defined(MY_ALLOCATOR)
	print_allocator_stat(allocator.get_statistics());
	allocator.destroy();
#elif defined(JEMALLOC)
	{
		//je_malloc_stats_print(nullptr, nullptr, nullptr);

		size_t sz = sizeof(jemalloc_post_allocated);
		je_mallctl("stats.active", &jemalloc_post_allocated, &sz, nullptr, 0);

		size_t leaked = jemalloc_post_allocated - jemalloc_pre_allocated;
		::wprintf(L"\nDone. Leaked: %zd bytes\n", leaked);
		bool failed = leaked > 65536; // in case C++ runtime allocated something (e.g. iostream locale or facet)
		::wprintf(L"\nTest %s!\n", (failed ? L"FAILED" : L"successful"));
	}
#endif

	return 0;
}