linux-kernel - [PATCH v4 0/3] perf: add support for analyzing events for containers

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Date:   Fri, 16 Dec 2016 00:06:55 +0530
From:   Hari Bathini <hbathini@...ux.vnet.ibm.com>
To:     ast@...com, peterz@...radead.org,
        lkml <linux-kernel@...r.kernel.org>, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, mingo@...hat.com
Cc:     daniel@...earbox.net, rostedt@...dmis.org,
        Ananth N Mavinakayanahalli <ananth@...ux.vnet.ibm.com>,
        ebiederm@...ssion.com, sargun@...gun.me,
        Aravinda Prasad <aravinda@...ux.vnet.ibm.com>,
        brendan.d.gregg@...il.com
Subject: [PATCH v4 0/3] perf: add support for analyzing events for containers

Currently, there is no trivial mechanism to analyze events based on
containers. perf -G can be used, but it will not filter events for the
containers created after perf is invoked, making it difficult to assess/
analyze performance issues of multiple containers at once.

This patch-set overcomes this limitation by using cgroup identifier as
container unique identifier. A new PERF_RECORD_NAMESPACES event that
records namespaces related info is introduced, from which the cgroup
namespace's device & inode numbers are used as cgroup identifier. This
is based on the assumption that each container is created with it's own
cgroup namespace allowing assessment/analysis of multiple containers
using cgroup identifier.

The first patch introduces PERF_RECORD_NAMESPACES in kernel while the
second patch makes the corresponding changes in perf tool to read this
PERF_RECORD_NAMESPACES events. The third patch adds a cgroup identifier
column in perf report, which contains the cgroup namespace's device and
inode numbers.

Changes from v3:
* Saving device number for each inode.
* cgroup identifier includes device number along with inode number.

---

Hari Bathini (3):
      perf: add PERF_RECORD_NAMESPACES to include namespaces related info
      perf tool: add PERF_RECORD_NAMESPACES to include namespaces related info
      perf tool: add cgroup identifier entry in perf report


 include/linux/perf_event.h            |    2 
 include/uapi/linux/perf_event.h       |   31 +++++++
 kernel/events/core.c                  |  135 ++++++++++++++++++++++++++++++++
 kernel/fork.c                         |    3 +
 kernel/nsproxy.c                      |    5 +
 tools/include/uapi/linux/perf_event.h |   31 +++++++
 tools/perf/builtin-annotate.c         |    1 
 tools/perf/builtin-diff.c             |    1 
 tools/perf/builtin-inject.c           |   14 +++
 tools/perf/builtin-kmem.c             |    1 
 tools/perf/builtin-kvm.c              |    2 
 tools/perf/builtin-lock.c             |    1 
 tools/perf/builtin-mem.c              |    1 
 tools/perf/builtin-record.c           |   33 +++++++-
 tools/perf/builtin-report.c           |    1 
 tools/perf/builtin-sched.c            |    1 
 tools/perf/builtin-script.c           |   41 ++++++++++
 tools/perf/builtin-trace.c            |    3 -
 tools/perf/perf.h                     |    1 
 tools/perf/util/Build                 |    1 
 tools/perf/util/data-convert-bt.c     |    2 
 tools/perf/util/event.c               |  138 ++++++++++++++++++++++++++++++++-
 tools/perf/util/event.h               |   18 ++++
 tools/perf/util/evsel.c               |    3 +
 tools/perf/util/hist.c                |    7 ++
 tools/perf/util/hist.h                |    1 
 tools/perf/util/machine.c             |   25 ++++++
 tools/perf/util/machine.h             |    3 +
 tools/perf/util/namespaces.c          |   27 ++++++
 tools/perf/util/namespaces.h          |   18 ++++
 tools/perf/util/session.c             |    7 ++
 tools/perf/util/sort.c                |   41 ++++++++++
 tools/perf/util/sort.h                |    7 ++
 tools/perf/util/thread.c              |   44 ++++++++++-
 tools/perf/util/thread.h              |    6 +
 tools/perf/util/tool.h                |    2 
 36 files changed, 643 insertions(+), 15 deletions(-)
 create mode 100644 tools/perf/util/namespaces.c
 create mode 100644 tools/perf/util/namespaces.h