linux-kernel - [PATCH v2 0/3] perf: add support for analyzing events for containers

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Date:   Thu, 24 Nov 2016 20:14:02 +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 v2 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 inode number is 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 is nothing but the cgroup namespace's
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            |    1 
 include/uapi/linux/perf_event.h       |   28 ++++++-
 kernel/events/core.c                  |  138 +++++++++++++++++++++++++++++++++
 kernel/fork.c                         |    3 +
 kernel/nsproxy.c                      |    5 +
 tools/include/uapi/linux/perf_event.h |   28 ++++++-
 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           |   30 ++++++-
 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               |  126 +++++++++++++++++++++++++++++-
 tools/perf/util/event.h               |   20 +++++
 tools/perf/util/evsel.c               |    3 +
 tools/perf/util/hist.c                |    4 +
 tools/perf/util/hist.h                |    1 
 tools/perf/util/machine.c             |   24 ++++++
 tools/perf/util/machine.h             |    3 +
 tools/perf/util/namespaces.c          |   28 +++++++
 tools/perf/util/namespaces.h          |   19 +++++
 tools/perf/util/session.c             |    7 ++
 tools/perf/util/sort.c                |   22 +++++
 tools/perf/util/sort.h                |    2 
 tools/perf/util/thread.c              |   44 ++++++++++-
 tools/perf/util/thread.h              |    7 ++
 tools/perf/util/tool.h                |    1 
 36 files changed, 600 insertions(+), 15 deletions(-)
 create mode 100644 tools/perf/util/namespaces.c
 create mode 100644 tools/perf/util/namespaces.h