Esempi in C++ (Cpp) per numa_nodemask_from_meminfo

Esempio n. 1

static int __init numa_alloc_distance(void)
{
	nodemask_t nodes_parsed;
	size_t size;
	int i, j, cnt = 0;
	u64 phys;

	/* size the new table and allocate it */
	/* numa_nodes_parsed에는 이미 분석이 끝난 node 정보들이 들어 있음 */
	nodes_parsed = numa_nodes_parsed;
	numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo);

	/* 마지막 node id가 cnt로 됨 */
	for_each_node_mask(i, nodes_parsed)
		cnt = i;
	cnt++;
	size = cnt * cnt * sizeof(numa_distance[0]);

	/* size크기 만큼 할당가능한 메모리 주소를 얻어옮 */
	phys = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
				      size, PAGE_SIZE);
	if (!phys) {
		pr_warning("NUMA: Warning: can't allocate distance table!\n");
		/* don't retry until explicitly reset */
		numa_distance = (void *)1LU;
		return -ENOMEM;
	}
  /* size 크기 만큼 등록 */
	memblock_reserve(phys, size);

	/* numa_distance 재설정 */
	numa_distance = __va(phys);
	numa_distance_cnt = cnt;

	/* fill with the default distances */
	/* 기본 distance 설정.
	같은 node일경우 Local Distance(10)를,
	아닌 경우 RemoteDistance(20) 저장 */
	for (i = 0; i < cnt; i++)
		for (j = 0; j < cnt; j++)
			numa_distance[i * cnt + j] = i == j ?
				LOCAL_DISTANCE : REMOTE_DISTANCE;
	printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt);

	return 0;
}

Esempio n. 2

File: numa.c Progetto: masterdroid/B14CKB1RD_kernel_m8

static int __init numa_alloc_distance(void)
{
	nodemask_t nodes_parsed;
	size_t size;
	int i, j, cnt = 0;
	u64 phys;

	
	nodes_parsed = numa_nodes_parsed;
	numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo);

	for_each_node_mask(i, nodes_parsed)
		cnt = i;
	cnt++;
	size = cnt * cnt * sizeof(numa_distance[0]);

	phys = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
				      size, PAGE_SIZE);
	if (!phys) {
		pr_warning("NUMA: Warning: can't allocate distance table!\n");
		
		numa_distance = (void *)1LU;
		return -ENOMEM;
	}
	memblock_reserve(phys, size);

	numa_distance = __va(phys);
	numa_distance_cnt = cnt;

	
	for (i = 0; i < cnt; i++)
		for (j = 0; j < cnt; j++)
			numa_distance[i * cnt + j] = i == j ?
				LOCAL_DISTANCE : REMOTE_DISTANCE;
	printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt);

	return 0;
}