linux-kernel - Re: [PATCH v6 2/3] perf tool: add PERF_RECORD_NAMESPACES to include namespaces related info

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Message-ID: <20170208125732.GC22166@krava>
Date:   Wed, 8 Feb 2017 13:57:32 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Hari Bathini <hbathini@...ux.vnet.ibm.com>
Cc:     ast@...com, peterz@...radead.org,
        lkml <linux-kernel@...r.kernel.org>, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, mingo@...hat.com,
        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: Re: [PATCH v6 2/3] perf tool: add PERF_RECORD_NAMESPACES to include
 namespaces related info

On Wed, Feb 08, 2017 at 02:01:49PM +0530, Hari Bathini wrote:
> This patch updates perf tool to examine PERF_RECORD_NAMESPACES events
> emitted by the kernel when fork, clone, setns or unshare are invoked.
> Also, it synthesizes PERF_RECORD_NAMESPACES events for processes that
> were running prior to invocation of perf record, the data for which
> is taken from /proc/$PID/ns. These changes make way for analyzing
> events with regard to namespaces.
> 
> Signed-off-by: Hari Bathini <hbathini@...ux.vnet.ibm.com>
> ---
>  tools/include/uapi/linux/perf_event.h |   38 +++++++++
>  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               |  143 ++++++++++++++++++++++++++++++++-
>  tools/perf/util/event.h               |   19 ++++
>  tools/perf/util/evsel.c               |    3 +
>  tools/perf/util/machine.c             |   34 ++++++++
>  tools/perf/util/machine.h             |    3 +
>  tools/perf/util/namespaces.c          |   35 ++++++++
>  tools/perf/util/namespaces.h          |   26 ++++++
>  tools/perf/util/session.c             |    7 ++
>  tools/perf/util/thread.c              |   44 ++++++++++
>  tools/perf/util/thread.h              |    6 +
>  tools/perf/util/tool.h                |    2 
>  27 files changed, 450 insertions(+), 14 deletions(-)
>  create mode 100644 tools/perf/util/namespaces.c
>  create mode 100644 tools/perf/util/namespaces.h

could you please split this patch into logically separated changes, like:
  - adding PERF_RECORD_NAMESPACES event with perf_event__process_namespaces
    machinery
  - synthesize support (perf_event__synthesize_namespaces) for record
  - script print support
  - perf_event__fprintf print support

or any other split that'd make sense, it's too many changes for one patch now

thanks,
jirka