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perf/core improvements and fixes:

Browse source 
User visible:
 
 - Enable per-event perf_event_attr.inherit setting by config terms, i.e.
   this becomes possible:
 
       $ perf record -e cycles/inherit/ -e instructions/no-inherit/
 
   This affects the default, that can be changed globally using the --no-inherit
   option.
 
   This fine grained control appeared in the eBPF patchkit, but this added
   flexibility may end up being useful in other scenarios (Wang Nan)
 
 - Setup pager when printing usage and help, we have long lists of options,
   better use the pager like we do with normal tooling output, i.e. when needed,
   and including any error messages in the paged output (Namhyung Kim)
 
 - Search for more options when passing args to -h, e.g.: (Arnaldo Carvalho de Melo)
 
   $ perf report -h interface
 
    Usage: perf report [<options>]
 
     --gtk    Use the GTK2 interface
     --stdio  Use the stdio interface
     --tui    Use the TUI interface
 
 - Fix reading separate debuginfo files based on a build-id, problem
   found on a Debian system (Dima Kogan)
 
 - Fix endless loop when splitting kallsyms symbols per section for
   handling kcore files, problem found on a s390x system (Jiri Olsa)
 
 Infrastructure:
 
 - Prep work for the 'perf stat record' work that will allow generating
   perf.data files with counting data in addition to the sampling mode
   we have now (Jiri Olsa)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

  - Enable per-event perf_event_attr.inherit setting by config terms, i.e.
    this becomes possible:

        $ perf record -e cycles/inherit/ -e instructions/no-inherit/

    This affects the default, that can be changed globally using the --no-inherit
    option.

    This fine grained control appeared in the eBPF patchkit, but this added
    flexibility may end up being useful in other scenarios. (Wang Nan)

  - Setup pager when printing usage and help, we have long lists of options,
    better use the pager like we do with normal tooling output, i.e. when needed,
    and including any error messages in the paged output. (Namhyung Kim)

  - Search for more options when passing args to -h, e.g.: (Arnaldo Carvalho de Melo)

    $ perf report -h interface

     Usage: perf report [<options>]

      --gtk    Use the GTK2 interface
      --stdio  Use the stdio interface
      --tui    Use the TUI interface

  - Fix reading separate debuginfo files based on a build-id, problem
    found on a Debian system. (Dima Kogan)

  - Fix endless loop when splitting kallsyms symbols per section for
    handling kcore files, problem found on a s390x system. (Jiri Olsa)

Infrastructure changes:

  - Prep work for the 'perf stat record' work that will allow generating
    perf.data files with counting data in addition to the sampling mode
    we have now (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-10-29 10:29:18 +01:00
commit 6fc774ef4c
21 changed files with 216 additions and 49 deletions
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