From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id 4C4346B003D for ; Fri, 11 Dec 2009 17:59:33 -0500 (EST) Received: by fxm5 with SMTP id 5so1597054fxm.28 for ; Fri, 11 Dec 2009 14:59:31 -0800 (PST) From: "Kirill A. Shutemov" Subject: [PATCH RFC v2 0/4] cgroup notifications API and memory thresholds Date: Sat, 12 Dec 2009 00:59:15 +0200 Message-Id: Sender: owner-linux-mm@kvack.org To: containers@lists.linux-foundation.org, linux-mm@kvack.org Cc: Paul Menage , Li Zefan , Andrew Morton , KAMEZAWA Hiroyuki , Balbir Singh , Pavel Emelyanov , Dan Malek , Vladislav Buzov , Daisuke Nishimura , linux-kernel@vger.kernel.org, "Kirill A. Shutemov" List-ID: This patchset introduces eventfd-based API for notifications in cgroups and implements memory notifications on top of it. It uses statistics in memory controler to track memory usage. Before changes: Root cgroup Performance counter stats for './multi-fault 2' (5 runs): 117596.249864 task-clock-msecs # 1.960 CPUs ( +- 0.043% ) 80114 context-switches # 0.001 M/sec ( +- 0.234% ) 80 CPU-migrations # 0.000 M/sec ( +- 24.934% ) 39120862 page-faults # 0.333 M/sec ( +- 0.138% ) 294682530295 cycles # 2505.884 M/sec ( +- 0.076% ) (scaled from 70.00%) 191303772329 instructions # 0.649 IPC ( +- 0.041% ) (scaled from 80.01%) 39400843259 branches # 335.052 M/sec ( +- 0.062% ) (scaled from 80.02%) 497810459 branch-misses # 1.263 % ( +- 1.584% ) (scaled from 80.02%) 3352408601 cache-references # 28.508 M/sec ( +- 0.251% ) (scaled from 19.98%) 128744 cache-misses # 0.001 M/sec ( +- 4.542% ) (scaled from 19.98%) 60.001025199 seconds time elapsed ( +- 0.000% ) Non-root cgroup Performance counter stats for './multi-fault 2' (5 runs): 116907.543887 task-clock-msecs # 1.948 CPUs ( +- 0.087% ) 70497 context-switches # 0.001 M/sec ( +- 0.204% ) 94 CPU-migrations # 0.000 M/sec ( +- 11.854% ) 33894593 page-faults # 0.290 M/sec ( +- 0.123% ) 291912994149 cycles # 2496.956 M/sec ( +- 0.102% ) (scaled from 70.03%) 194998499007 instructions # 0.668 IPC ( +- 0.109% ) (scaled from 80.01%) 41752189092 branches # 357.139 M/sec ( +- 0.118% ) (scaled from 79.96%) 487437901 branch-misses # 1.167 % ( +- 0.378% ) (scaled from 79.95%) 3076284269 cache-references # 26.314 M/sec ( +- 0.471% ) (scaled from 20.04%) 170468 cache-misses # 0.001 M/sec ( +- 1.481% ) (scaled from 20.05%) 60.001211398 seconds time elapsed ( +- 0.000% ) After changes: Root cgroup Performance counter stats for './multi-fault 2' (5 runs): 117396.738764 task-clock-msecs # 1.957 CPUs ( +- 0.047% ) 78763 context-switches # 0.001 M/sec ( +- 0.132% ) 109 CPU-migrations # 0.000 M/sec ( +- 25.646% ) 38141062 page-faults # 0.325 M/sec ( +- 0.107% ) 294257674123 cycles # 2506.523 M/sec ( +- 0.045% ) (scaled from 70.01%) 194937378540 instructions # 0.662 IPC ( +- 0.120% ) (scaled from 79.98%) 40694602714 branches # 346.642 M/sec ( +- 0.127% ) (scaled from 79.95%) 529968529 branch-misses # 1.302 % ( +- 1.668% ) (scaled from 79.94%) 3196763471 cache-references # 27.230 M/sec ( +- 0.262% ) (scaled from 20.05%) 201095 cache-misses # 0.002 M/sec ( +- 3.315% ) (scaled from 20.06%) 60.001025546 seconds time elapsed ( +- 0.000% ) Non-root cgroup: Performance counter stats for './multi-fault 2' (5 runs): 116471.855099 task-clock-msecs # 1.941 CPUs ( +- 0.067% ) 69393 context-switches # 0.001 M/sec ( +- 0.099% ) 117 CPU-migrations # 0.000 M/sec ( +- 14.049% ) 33043048 page-faults # 0.284 M/sec ( +- 0.086% ) 290751403642 cycles # 2496.323 M/sec ( +- 0.073% ) (scaled from 69.97%) 196594115294 instructions # 0.676 IPC ( +- 0.065% ) (scaled from 79.97%) 42507307304 branches # 364.958 M/sec ( +- 0.054% ) (scaled from 79.96%) 500670691 branch-misses # 1.178 % ( +- 0.729% ) (scaled from 79.98%) 2935664654 cache-references # 25.205 M/sec ( +- 0.153% ) (scaled from 20.04%) 224967 cache-misses # 0.002 M/sec ( +- 2.462% ) (scaled from 20.02%) 60.001218531 seconds time elapsed ( +- 0.000% ) Any comments? TODO: - documentation. v1 -> v2: - use statistics instead of res_counter to track resource usage; - fix bugs with locking; v0 -> v1: - memsw support implemented. Kirill A. Shutemov (4): cgroup: implement eventfd-based generic API for notifications memcg: extract mem_group_usage() from mem_cgroup_read() memcg: rework usage of stats by soft limit memcg: implement memory thresholds include/linux/cgroup.h | 20 +++ kernel/cgroup.c | 215 ++++++++++++++++++++++++++++++- mm/memcontrol.c | 335 ++++++++++++++++++++++++++++++++++++++++++++---- 3 files changed, 543 insertions(+), 27 deletions(-) -- 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/ . Don't email: email@kvack.org