On Tue, 28 Jun 2011 17:42:11 -0700 Kevin Constantine <kevin.constant...@disneyanimation.com> wrote:
> On 06/28/2011 05:32 PM, Daisuke Nishimura wrote: > > Hi. > > > > On Tue, 28 Jun 2011 11:26:14 -0700 > > Kevin Constantine<kevin.constant...@disneyanimation.com> wrote: > > > >> Hey everyone- > >> > >> I'm not sure what to make of the memory.usage_in_bytes value. There's a > >> cgroup that has no processes in it, but the memory.usage_in_bytes is set > >> to 4GB. > >> > >> [root@tera1132 coda]# cat cgroup.procs > >> [root@tera1132 coda]# cat tasks > >> [root@tera1132 coda]# cat memory.usage_in_bytes > >> 4670476288 > >> [root@tera1132 coda]# > >> > >> Is this a bug, or am I mis-understanding the purpose of that attribute? > >> > > What does "cat memory.use_hierarchy" show ? > > If it shows "1"(iow, enabled), the usages of all cgroups under the directory > > are summed up and accounted as usage of the directory. > > > > Thanks, > > Daisuke Nishimura. > > memory.use_heirarchy is 0. There aren't any cgroups below this one anyway. > > [root@tera1138 coda]# cat cgroup.procs > [root@tera1138 coda]# cat tasks > [root@tera1138 coda]# cat memory.use_hierarchy > 0 > [root@tera1138 coda]# cat memory.usage_in_bytes > 3161718784 > [root@tera1138 coda]# > > -kevin hmm, I see. Another possibility is that these usages are used by processes which were running in the group before(and not in the group anymore, or have exited). You can use memory.move_charge_at_immigrate to move usage along with task move. But note that it can only move usage of mmaped memory by the process(See Documentation/cgroups/memory.txt for details), and older kernel doesn't have the feature. And, page-cache is not freed usually even if a process has exited. If you want to flush it, you need "echo 1 >/proc/sys/vm/drop_caches". Thanks, Daisuke Nishimura. ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 _______________________________________________ Libcg-devel mailing list Libcg-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libcg-devel
