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Date: Tue, 20 May 2008 18:09:55 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"menage@...gle.com" <menage@...gle.com>,
"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
"xemul@...nvz.org" <xemul@...nvz.org>,
"lizf@...fujitsu.com" <lizf@...fujitsu.com>,
"yamamoto@...inux.co.jp" <yamamoto@...inux.co.jp>
Subject: [RFC][PATCH 3/3] memcg: per node information
Show per-node statistics in following format.
node-id total acitve inactive
[root@...dium bench]# cat /opt/cgroup/memory.numa_stat
0 417611776 99586048 318025728
1 655360000 0 655360000
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
---
mm/memcontrol.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
Index: mm-2.6.26-rc2-mm1/mm/memcontrol.c
===================================================================
--- mm-2.6.26-rc2-mm1.orig/mm/memcontrol.c
+++ mm-2.6.26-rc2-mm1/mm/memcontrol.c
@@ -960,6 +960,66 @@ static int mem_control_stat_show(struct
return 0;
}
+#ifdef CONFIG_NUMA
+static void *memcg_numastat_start(struct seq_file *m, loff_t *pos)
+{
+ loff_t node = *pos;
+ struct pglist_data *pgdat = first_online_pgdat();
+
+ while (pgdat != NULL) {
+ if (!node)
+ break;
+ pgdat = next_online_pgdat(pgdat);
+ node--;
+ }
+ return pgdat;
+}
+
+static void *memcg_numastat_next(struct seq_file *m, void *arg, loff_t *pos)
+{
+ struct pglist_data *pgdat = (struct pglist_data *)arg;
+
+ (*pos)++;
+ return next_online_pgdat(pgdat);
+}
+
+static void memcg_numastat_stop(struct seq_file *m, void *arg)
+{
+}
+
+static int memcg_numastat_show(struct seq_file *m, void *arg)
+{
+ struct pglist_data *pgdat = (struct pglist_data *)arg;
+ int nid = pgdat->node_id;
+ struct cgroup *cgrp = cgroup_of_seqfile(m);
+ struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
+ struct mem_cgroup_per_zone *mz;
+ long active, inactive, total;
+ int zid;
+
+ active = 0;
+ inactive = 0;
+
+ for (zid = 0; zid < MAX_NR_ZONES; zid++) {
+ mz = mem_cgroup_zoneinfo(memcg, nid, zid);
+ active += MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_ACTIVE);
+ inactive += MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_INACTIVE);
+ }
+ active *= PAGE_SIZE;
+ inactive *= PAGE_SIZE;
+ total = active + inactive;
+ /* Node Total Active Inactive (Total = Active + Inactive) */
+ return seq_printf(m, "%d %ld %ld %ld\n", nid, total, active, inactive);
+}
+
+struct seq_operations memcg_numastat_op = {
+ .start = memcg_numastat_start,
+ .next = memcg_numastat_next,
+ .stop = memcg_numastat_stop,
+ .show = memcg_numastat_show,
+};
+#endif
+
static struct cftype mem_cgroup_files[] = {
{
.name = "usage_in_bytes",
@@ -992,6 +1052,12 @@ static struct cftype mem_cgroup_files[]
.name = "stat",
.read_map = mem_control_stat_show,
},
+#ifdef CONFIG_NUMA
+ {
+ .name = "numa_stat",
+ .seq_ops = &memcg_numastat_op,
+ },
+#endif
};
static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node)
Index: mm-2.6.26-rc2-mm1/Documentation/controllers/memory_files.txt
===================================================================
--- mm-2.6.26-rc2-mm1.orig/Documentation/controllers/memory_files.txt
+++ mm-2.6.26-rc2-mm1/Documentation/controllers/memory_files.txt
@@ -74,3 +74,13 @@ Files under memory resource controller a
(write)
Reset to 0.
+* memory.numa_stat
+
+ This file appears only when the kernel is configured as NUMA.
+
+ (read)
+ Show per-node accounting information of acitve/inactive pages.
+ formated as following.
+ nodeid total active inactive
+
+ total = active + inactive.
--
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