linux-kernel - [GIT PULL 0/8] perf/core improvements and fixes

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Date:	Tue, 15 Sep 2015 12:28:29 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	Daniel Borkmann <daniel@...earbox.net>,
	David Ahern <dsahern@...il.com>, He Kuang <hekuang@...wei.com>,
	Jiri Olsa <jolsa@...hat.com>, Kaixu Xia <xiakaixu@...wei.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, pi3orama@....com,
	Raphael Beamonte <raphael.beamonte@...il.com>,
	Wang Nan <wangnan0@...wei.com>, Zefan Li <lizefan@...wei.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [GIT PULL 0/8] perf/core improvements and fixes

Hi Ingo,

	Please consider pulling,

- Arnaldo

The following changes since commit 9059b284caecb628fac826c2c5cc8ee85708eec1:

  Merge tag 'perf-core-for-mingo-2' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core (2015-09-15 08:50:59 +0200)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo

for you to fetch changes up to bbbe6bf6037d77816c4a19aaf35f4cecf662b49a:

  perf tools: Introduce regs_query_register_offset() for x86 (2015-09-15 09:48:33 -0300)

----------------------------------------------------------------
perf/core improvements and fixes:

User visible:

- Enhance the error reporting of tracepoint event parsing, e.g.:

    $ oldperf record -e sched:sched_switc usleep 1
    event syntax error: 'sched:sched_switc'
                        \___ unknown tracepoint
    Run 'perf list' for a list of valid events

  Now we get the much nicer:

    $ perf record -e sched:sched_switc ls
    event syntax error: 'sched:sched_switc'
                         \___ can't access trace events

    Error: No permissions to read /sys/kernel/debug/tracing/events/sched/sched_switc
    Hint:  Try 'sudo mount -o remount,mode=755 /sys/kernel/debug'

  And after we have those mount point permissions fixed:

    $ perf record -e sched:sched_switc ls
    event syntax error: 'sched:sched_switc'
                         \___ unknown tracepoint

    Error: File /sys/kernel/debug/tracing/events/sched/sched_switc not found.
    Hint:  Perhaps this kernel misses some CONFIG_ setting to enable this feature?.

  Now its just a matter of using what git uses to suggest alternatives when we
  make a typo, i.e. that it is just an 'h' missing :-)

  I.e. basically now the event parsing routing uses the strerror_open()
  routines introduced by and used in 'perf trace' work. (Jiri Olsa)

Infrastructure:

- Export init/exit_probe_symbol_maps() from 'perf probe' for use in eBPF
  (Namhyung Kim)

- Free perf_probe_event in cleanup_perf_probe_events() (Namhyung Kim)

- regs_query_register_offset() infrastructure + implementation for x86.
  First user will be the perf/eBPF code (Wang Nan)

Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>

----------------------------------------------------------------
Jiri Olsa (4):
      tools: Add err.h with ERR_PTR PTR_ERR interface
      perf tools: Propagate error info for the tracepoint parsing
      perf evsel: Propagate error info from tp_format
      perf tools: Enhance parsing events tracepoint error output

Namhyung Kim (2):
      perf probe: Free perf_probe_event in cleanup_perf_probe_events()
      perf probe: Export init/exit_probe_symbol_maps()

Wang Nan (2):
      perf tools: regs_query_register_offset() infrastructure
      perf tools: Introduce regs_query_register_offset() for x86

 tools/include/linux/err.h                   |  49 +++++++++++
 tools/perf/arch/x86/Makefile                |   1 +
 tools/perf/arch/x86/util/dwarf-regs.c       | 122 ++++++++++++++++++++--------
 tools/perf/builtin-probe.c                  |   5 ++
 tools/perf/builtin-trace.c                  |  19 +++--
 tools/perf/config/Makefile                  |   4 +
 tools/perf/tests/evsel-tp-sched.c           |  10 ++-
 tools/perf/tests/mmap-basic.c               |   3 +-
 tools/perf/tests/openat-syscall-all-cpus.c  |   3 +-
 tools/perf/tests/openat-syscall-tp-fields.c |   3 +-
 tools/perf/tests/openat-syscall.c           |   3 +-
 tools/perf/util/evlist.c                    |   3 +-
 tools/perf/util/evsel.c                     |  16 +++-
 tools/perf/util/evsel.h                     |   3 +
 tools/perf/util/include/dwarf-regs.h        |   8 ++
 tools/perf/util/parse-events.c              |  66 +++++++++++----
 tools/perf/util/parse-events.h              |   3 +-
 tools/perf/util/parse-events.y              |  16 ++--
 tools/perf/util/probe-event.c               |  32 ++++----
 tools/perf/util/probe-event.h               |   2 +
 tools/perf/util/trace-event.c               |  15 +++-
 21 files changed, 291 insertions(+), 95 deletions(-)
 create mode 100644 tools/include/linux/err.h
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