linux-kernel - [PATCH 2/2] tools: vm: slabinfo: Add numa information for objects

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Message-Id: <20200217084828.9092-3-tobin@kernel.org>
Date:   Mon, 17 Feb 2020 19:48:28 +1100
From:   "Tobin C. Harding" <tobin@...nel.org>
To:     Christoph Lameter <cl@...ux.com>
Cc:     "Tobin C. Harding" <tobin@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] tools: vm: slabinfo: Add numa information for objects

Currently we are not handling NUMA information for a bunch of slab
attribute files, files of form `170 N0=170 ...`.  These are

          objects
          objects_partial
          total_objects
          cpu_slabs

For other attribute files, namely `partial` and `slabs`, we do handle
the NUMA information.

Add a field to the slabinfo struct for the NUMA information and
output it during a NUMA report as is done for `slabs` and `partial`.

reference: /sys/kernel/slab/kmeme_cache_node/

Signed-off-by: Tobin C. Harding <tobin@...nel.org>
---
 tools/vm/slabinfo.c | 67 +++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 62 insertions(+), 5 deletions(-)

diff --git a/tools/vm/slabinfo.c b/tools/vm/slabinfo.c
index 29f8ecb59cf6..65254c051da2 100644
--- a/tools/vm/slabinfo.c
+++ b/tools/vm/slabinfo.c
@@ -46,6 +46,10 @@ struct slabinfo {
 	unsigned long cpu_partial_alloc, cpu_partial_free;
 	int numa[MAX_NODES];
 	int numa_partial[MAX_NODES];
+	int numa_objects[MAX_NODES];
+	int numa_objects_partial[MAX_NODES];
+	int numa_total_objects[MAX_NODES];
+	int numa_cpu_slabs[MAX_NODES];
 } slabinfo[MAX_SLABS];
 
 struct aliasinfo {
@@ -394,13 +398,49 @@ static void slab_numa(struct slabinfo *s, int mode)
 	printf("\n");
 	if (mode) {
 		printf("%-21s ", "Partial slabs");
-		for(node = 0; node <= highest_node; node++) {
+		for (node = 0; node <= highest_node; node++) {
 			char b[20];
 
 			store_size(b, s->numa_partial[node]);
 			printf(" %4s", b);
 		}
 		printf("\n");
+
+		printf("%-21s ", "CPU slabs");
+		for (node = 0; node <= highest_node; node++) {
+			char b[20];
+
+			store_size(b, s->numa_cpu_slabs[node]);
+			printf(" %4s", b);
+		}
+		printf("\n");
+
+		printf("%-21s ", "Objects");
+		for (node = 0; node <= highest_node; node++) {
+			char b[20];
+
+			store_size(b, s->numa_objects[node]);
+			printf(" %4s", b);
+		}
+		printf("\n");
+
+		printf("%-21s ", "Partial objects");
+		for (node = 0; node <= highest_node; node++) {
+			char b[20];
+
+			store_size(b, s->numa_objects_partial[node]);
+			printf(" %4s", b);
+		}
+		printf("\n");
+
+		printf("%-21s ", "Total objects");
+		for (node = 0; node <= highest_node; node++) {
+			char b[20];
+
+			store_size(b, s->numa_total_objects[node]);
+			printf(" %4s", b);
+		}
+		printf("\n");
 	}
 	line++;
 }
@@ -1205,6 +1245,7 @@ static void read_slab_dir(void)
 			alias->ref = strdup(p);
 			alias++;
 			break;
+
 		   case DT_DIR:
 			if (chdir(de->d_name))
 				fatal("Unable to access slab %s\n", slab->name);
@@ -1214,13 +1255,27 @@ static void read_slab_dir(void)
 			slab->aliases = get_obj("aliases");
 			slab->align = get_obj("align");
 			slab->cache_dma = get_obj("cache_dma");
-			slab->cpu_slabs = get_obj("cpu_slabs");
+
+			slab->cpu_slabs = get_obj_and_str("cpu_slabs", &t);
+			decode_numa_list(slab->numa_cpu_slabs, t);
+			free(t);
+
 			slab->destroy_by_rcu = get_obj("destroy_by_rcu");
 			slab->hwcache_align = get_obj("hwcache_align");
 			slab->object_size = get_obj("object_size");
-			slab->objects = get_obj("objects");
-			slab->objects_partial = get_obj("objects_partial");
-			slab->objects_total = get_obj("objects_total");
+
+			slab->objects = get_obj_and_str("objects", &t);
+			decode_numa_list(slab->numa_objects, t);
+			free(t);
+
+			slab->objects_partial = get_obj_and_str("objects_partial", &t);
+			decode_numa_list(slab->numa_objects_partial, t);
+			free(t);
+
+			slab->objects_total = get_obj_and_str("total_objects", &t);
+			decode_numa_list(slab->numa_total_objects, t);
+			free(t);
+
 			slab->objs_per_slab = get_obj("objs_per_slab");
 			slab->order = get_obj("order");
 			slab->partial = get_obj("partial");
@@ -1232,9 +1287,11 @@ static void read_slab_dir(void)
 			slab->red_zone = get_obj("red_zone");
 			slab->sanity_checks = get_obj("sanity_checks");
 			slab->slab_size = get_obj("slab_size");
+
 			slab->slabs = get_obj_and_str("slabs", &t);
 			decode_numa_list(slab->numa, t);
 			free(t);
+
 			slab->store_user = get_obj("store_user");
 			slab->trace = get_obj("trace");
 			slab->alloc_fastpath = get_obj("alloc_fastpath");
-- 
2.17.1