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memcg: show reclaim stat 

Add the following four fields to memory.stat file:

  - inactive_ratio
  - recent_rotated_anon
  - recent_rotated_file
  - recent_scanned_anon
  - recent_scanned_file

Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KOSAKI Motohiro 2009-01-07 18:08:22 -08:00 committed by Linus Torvalds
parent 9439c1c95b
commit 7f016ee8b6
2 changed files with 55 additions and 0 deletions
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25
Documentation/controllers/memory.txt
View File

@ -289,6 +289,31 @@ will be charged as a new owner of it.
Because rmdir() moves all pages to parent, some out-of-use page caches can be
moved to the parent. If you want to avoid that, force_empty will be useful.
5.2 stat file
memory.stat file includes following statistics (now)
cache - # of pages from page-cache and shmem.
rss - # of pages from anonymous memory.
pgpgin - # of event of charging
pgpgout - # of event of uncharging
active_anon - # of pages on active lru of anon, shmem.
inactive_anon - # of pages on active lru of anon, shmem
active_file - # of pages on active lru of file-cache
inactive_file - # of pages on inactive lru of file cache
unevictable - # of pages cannot be reclaimed.(mlocked etc)
Below is depend on CONFIG_DEBUG_VM.
inactive_ratio - VM inernal parameter. (see mm/page_alloc.c)
recent_rotated_anon - VM internal parameter. (see mm/vmscan.c)
recent_rotated_file - VM internal parameter. (see mm/vmscan.c)
recent_scanned_anon - VM internal parameter. (see mm/vmscan.c)
recent_scanned_file - VM internal parameter. (see mm/vmscan.c)
Memo:
recent_rotated means recent frequency of lru rotation.
recent_scanned means recent # of scans to lru.
showing for better debug please see the code for meanings.
6. Hierarchy support
The memory controller supports a deep hierarchy and hierarchical accounting.

30
mm/memcontrol.c
View File

@ -1816,6 +1816,36 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
cb->fill(cb, "unevictable", unevictable * PAGE_SIZE);
}
#ifdef CONFIG_DEBUG_VM
cb->fill(cb, "inactive_ratio", mem_cont->inactive_ratio);
{
int nid, zid;
struct mem_cgroup_per_zone *mz;
unsigned long recent_rotated[2] = {0, 0};
unsigned long recent_scanned[2] = {0, 0};
for_each_online_node(nid)
for (zid = 0; zid < MAX_NR_ZONES; zid++) {
mz = mem_cgroup_zoneinfo(mem_cont, nid, zid);
recent_rotated[0] +=
mz->reclaim_stat.recent_rotated[0];
recent_rotated[1] +=
mz->reclaim_stat.recent_rotated[1];
recent_scanned[0] +=
mz->reclaim_stat.recent_scanned[0];
recent_scanned[1] +=
mz->reclaim_stat.recent_scanned[1];
}
cb->fill(cb, "recent_rotated_anon", recent_rotated[0]);
cb->fill(cb, "recent_rotated_file", recent_rotated[1]);
cb->fill(cb, "recent_scanned_anon", recent_scanned[0]);
cb->fill(cb, "recent_scanned_file", recent_scanned[1]);
}
#endif
return 0;
}