From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id 818E96B0011 for ; Tue, 24 May 2011 03:02:42 -0400 (EDT) From: Ying Han Subject: [PATCH V2] memcg: add documentation for memory.numastat API. Date: Tue, 24 May 2011 00:01:53 -0700 Message-Id: <1306220513-7763-1-git-send-email-yinghan@google.com> Sender: owner-linux-mm@kvack.org List-ID: To: KOSAKI Motohiro , Minchan Kim , Daisuke Nishimura , Balbir Singh , Tejun Heo , Pavel Emelyanov , KAMEZAWA Hiroyuki , Andrew Morton , Li Zefan , Mel Gorman , Christoph Lameter , Johannes Weiner , Rik van Riel , Hugh Dickins , Michal Hocko , Dave Hansen , Zhu Yanhai Cc: linux-mm@kvack.org change v2..v1: 1. add sample output. Signed-off-by: Ying Han --- Documentation/cgroups/memory.txt | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index 2d7e527..0b1a1ce 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -71,6 +71,7 @@ Brief summary of control files. memory.move_charge_at_immigrate # set/show controls of moving charges memory.oom_control # set/show oom controls. memory.async_control # set control for asynchronous memory reclaim + memory.numa_stat # show the number of memory usage per numa node 1. History @@ -477,6 +478,23 @@ value for efficient access. (Of course, when necessary, it's synchronized.) If you want to know more exact memory usage, you should use RSS+CACHE(+SWAP) value in memory.stat(see 5.2). +5.6 numa_stat + +This is similar to numa_maps but per-memcg basis. This is useful to add visibility +of numa locality information in memcg since the pages are allowed to be allocated +at any physical node. One of the usecase is evaluating application performance by +combining this information with the cpu allocation to the application. + +We export "total", "file", "anon" and "unevictable" pages per-node for each memcg. +The format ouput of the memory.numa_stat: + +total= N0= N1= ... +file= N0= N1= ... +anon= N0= N1= ... +unevictable= N0= N1= ... + +And we have total = file + anon + unevictable. + 6. Hierarchy support The memory controller supports a deep hierarchy and hierarchical accounting. -- 1.7.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org