[PATCH 0/4] Show cpu cgroup's nr_running and nr_iowait in cpu.stat file

[Kirill Tkhai <ktkhai@virtuozzo.com>]

The patchset exports numbers of cpu cgroup's running tasks and tasks in iowait
to userspace. This may be useful to get statistics of a separate container and
to analyse its load.

Number of running tasks is accounted as a sum of corresponding cfs and rt tasks
of the task cgroup. Number of iowait task is accounted similar to global nr_iowait
(it's incremented on dequeue in __schedule() and dectemented on try_to_wakeup)
with the only exception we handle changing of cgroup in sched_change_group().

---

Kirill Tkhai (4):
      sched: Move manipulations with nr_iowait counter to separate functions
      sched: Account per task_group nr_iowait
      sched: Export per task_cgroup nr_iowait to userspace
      sched: Export per task_cgroup nr_running to userspace


 kernel/sched/core.c  |  107 ++++++++++++++++++++++++++++++++++++++++----------
 kernel/sched/sched.h |    5 ++
 2 files changed, 90 insertions(+), 22 deletions(-)

--
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>