Unverified Commit 590f4f13 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!6824 Introduce CONFIG_ARCH_CUSTOM_NUMA_DISTANCE 

Merge Pull Request from: @ci-robot 
 
PR sync from: Hui Tang <tanghui20@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/3C4T3FTBUBR5UYOXQV53W2RA6EG2NCQB/ 
This patchset allow arch adjust node_relaim_distance, as follow:

Hui Tang (2):
  arm64/numa: Support node_reclaim_distance adjust for arch
  config: enable COBFIG_ARCH_CUSTOM_NUMA_DISTANCE for arm64


-- 
2.34.1
 
https://gitee.com/openeuler/kernel/issues/I8PG0C 
 
Link:https://gitee.com/openeuler/kernel/pulls/6824

 

Reviewed-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: default avatarZhang Jianhua <chris.zjh@huawei.com>
Signed-off-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
parents 1b2e5bdd 799eb28f

arch/arm64/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -1582,6 +1582,19 @@ config NUMA_AWARE_SPINLOCKS 


	  Say N if you want absolute first come first serve fairness.



config ARCH_CUSTOM_NUMA_DISTANCE

	bool "Support custom node relaim distance"

	depends on ARCH_HISI && NUMA

	default n

	help

	  Allow arch to adjust node_reclaim_distance.



	  Some machines may have a specific node distance to achieve optimal

	  system performance. You can set a specific node_reclaim_distance based

	  on the system topology.



	  If unsure, say N.



source "kernel/Kconfig.hz"



config ARCH_SPARSEMEM_ENABLE

arch/arm64/configs/openeuler_defconfig

+1 −0
Original line number Diff line number Diff line
@@ -464,6 +464,7 @@ CONFIG_HOTPLUG_CPU=y 
CONFIG_NUMA=y

CONFIG_NODES_SHIFT=8

CONFIG_NUMA_AWARE_SPINLOCKS=y

CONFIG_ARCH_CUSTOM_NUMA_DISTANCE=y

# CONFIG_HZ_100 is not set

CONFIG_HZ_250=y

# CONFIG_HZ_300 is not set

drivers/base/arch_numa.c

+85 −0
Original line number Diff line number Diff line
@@ -189,6 +189,89 @@ void __init setup_per_cpu_areas(void) 
}

#endif



#ifdef CONFIG_ARCH_CUSTOM_NUMA_DISTANCE

#define DISTANCE_MAX		(1 << DISTANCE_BITS)

static void get_numa_distance_info(int *numa_levels, int *max_distance)

{

	DECLARE_BITMAP(distance_map, DISTANCE_MAX);

	int max = 0;

	int i, j;



	bitmap_zero(distance_map, DISTANCE_MAX);

	for (i = 0; i < nr_node_ids; i++) {

		for (j = 0; j < nr_node_ids; j++) {

			int distance = node_distance(i, j);



			if (distance < LOCAL_DISTANCE ||

			    distance >= DISTANCE_MAX) {

				return;

			}



			if (distance > max)

				max = distance;



			bitmap_set(distance_map, distance, 1);

		}

	}



	if (numa_levels)

		*numa_levels = bitmap_weight(distance_map, DISTANCE_MAX);



	if (max_distance)

		*max_distance = max;

}



static int __init node_reclaim_distance_setup(char *str)

{

	int val;



	if (kstrtoint(str, 0, &val))

		return -EINVAL;



	if (val < LOCAL_DISTANCE || val >= DISTANCE_MAX)

		return -EINVAL;



	if (val != RECLAIM_DISTANCE) {

		node_reclaim_distance = val;

		pr_info("Force set node_reclaim_distance to %d\n", val);

	}



	return 0;

}

early_param("node_reclaim_distance", node_reclaim_distance_setup);



static void __init node_reclaim_distance_adjust(void)

{

	unsigned int model = read_cpuid_id() & MIDR_CPU_MODEL_MASK;

	int max_distance = 0;

	int numa_levels = 0;



	switch (model) {

	case MIDR_HISI_LINXICORE9100:

		get_numa_distance_info(&numa_levels, &max_distance);



		/*

		 * When numa_level more than three, sched domain may be

		 * asymmetrical, the number of CPUs of sched group is different

		 * from the brother in sched domain.

		 */

		if (nr_node_ids < 4 || numa_levels <= 3 ||

		    node_reclaim_distance != RECLAIM_DISTANCE ||

		    max_distance <= RECLAIM_DISTANCE)

			break;



		node_reclaim_distance = max_distance;

		pr_info("Force adjust node_reclaim_distance to %d\n",

			node_reclaim_distance);

		break;

	default:

		break;

	}

}

#else

static inline void __init node_reclaim_distance_adjust(void) {}

#endif



/**

 * numa_add_memblk() - Set node id to memblk

 * @nid: NUMA node ID of the new memblk
@@ -401,6 +484,8 @@ static int __init numa_init(int (*init_func)(void)) 


	setup_node_to_cpumask_map();



	node_reclaim_distance_adjust();



	return 0;

out_free_distance:

	numa_free_distance();