• Jiri Olsa's avatar
    perf report: Support forced leader feature in pipe mode · 57b5de46
    Jiri Olsa authored
    Stephane reported a problem with forced leader in pipe mode, where
    report does not force the group output. The reason is that we don't
    force the leader in pipe mode.
    
    This patch adds HEADER_LAST_FEATURE mark to have a point where we have
    all events and features received, and force the group if requested.
    
      $ perf record --group -e '{cycles, instructions}' -o - kill | perf report -i - --group
    
      SNIP
    
      #         Overhead  Command  Shared Object     Symbol
      # ................  .......  ................  .......................
      #
          28.36%   0.00%  kill     libc-2.25.so      [.] __unregister_atfork
          26.32%   0.00%  kill     libc-2.25.so      [.] _dl_addr
          26.10%   0.00%  kill     ld-2.25.so        [.] _dl_relocate_object
          17.32%   0.00%  kill     ld-2.25.so        [.] __tunables_init
           1.70%   0.01%  kill     [unknown]         [k] 0xffffffffafa01a40
           0.20%   0.00%  kill     ld-2.25.so        [.] _start
           0.00%  48.77%  kill     ld-2.25.so        [.] do_lookup_x
           0.00%  42.97%  kill     libc-2.25.so      [.] _IO_getline
           0.00%   6.35%  kill     ld-2.25.so        [.] strcmp
           0.00%   1.71%  kill     ld-2.25.so        [.] _dl_sysdep_start
           0.00%   0.19%  kill     ld-2.25.so        [.] _dl_start
    Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
    Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    Tested-by: default avatarStephane Eranian <eranian@google.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Link: http://lkml.kernel.org/r/20180314092205.23291-2-jolsa@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    57b5de46
header.c 82.5 KB