Hi, This patch enables to get CPU usage of a lxc using cpuacct subsystem of cgroups.

On Fri, Mar 06, 2009 at 02:27:04PM +0100, Daniel Veillard wrote: > On Thu, Mar 05, 2009 at 02:34:48AM +0900, Ryota Ozaki wrote: > > Hi, > > > > This patch enables to get CPU usage of a lxc using cpuacct subsystem > > of cgroups. > >   Looks cool, what kernel version is required to make use of this ? > The kernel patch seems to be from last december, but I'm not sure. > I would just prefer to make sure it's in a released kernel version > before applying the patch here :-) It is in 2.6.27 because I can see it there on my Fedora 9 box after doing # mount -t cgroup none /mnt/cg # ls /mnt/cg cpuacct.usage           cpuset.memory_pressure_enabled   devices.deny cpuset.cpu_exclusive    cpuset.memory_spread_page        devices.list cpuset.cpus             cpuset.memory_spread_slab        notify_on_release cpuset.mem_exclusive    cpuset.mems                      release_agent cpuset.mem_hardwall     cpuset.sched_load_balance        tasks cpuset.memory_migrate   cpuset.sched_relax_domain_level cpuset.memory_pressure  devices.allow The Linux kernel support for containers is still incomplete, so I don't think it is worth fixing on a long term minimum kernel version for LXC just yet. We still need the PTS filesystem virtualization before you can consider LXC a reasonably secure container and I don't think that's until 2.6.30.

Daniel -- |: Red Hat, Engineering, London   -o-   http://people.redhat.com/berrange/ :| |: http://libvirt.org  -o-  http://virt-manager.org  -o-  http://ovirt.org :| |: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505  -o-  F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|

Hi Daniel, On Fri, Mar 6, 2009 at 10:27 PM, Daniel Veillard <veillard(a)redhat.com&gt; wrote: > On Thu, Mar 05, 2009 at 02:34:48AM +0900, Ryota Ozaki wrote: >> Hi, >> >> This patch enables to get CPU usage of a lxc using cpuacct subsystem >> of cgroups. > >  Looks cool, what kernel version is required to make use of this ? > The kernel patch seems to be from last december, but I'm not sure. > I would just prefer to make sure it's in a released kernel version > before applying the patch here :-) Actually I didn't know that ;-), but... $ git-checkout v2.6.23 Previous HEAD position was 4991408... Linux 2.6.24 HEAD is now at bbf25010f... Linux 2.6.23 $ grep -r cpuacct kernel |wc -l 0 $ git-checkout v2.6.24 Previous HEAD position was bbf25010f... Linux 2.6.23 Checking out files: 100% (10210/10210), done. HEAD is now at 4991408... Linux 2.6.24 $ grep -r cpuacct kernel |wc -l 27 ok, it must be at v2.6.24!