• Namhyung Kim's avatar
    perf report: Show random usage tip on the help line · 14cbfbeb
    Namhyung Kim authored
    Currently perf report only shows a help message "For a higher level
    overview, try: perf report --sort comm,dso" unconditionally (even if
    the sort keys were used).  Add more help tips and show randomly.
    
    Load tips from ${prefix}/share/doc/perf-tip/tips.txt file.
    
      $ perf report | tail
          0.10%  swapper  [kernel.vmlinux]   [k] irq_exit
          0.09%  swapper  [kernel.vmlinux]   [k] flush_smp_call_function_queue
          0.08%  swapper  [kernel.vmlinux]   [k] native_write_msr_safe
          0.03%  swapper  [kernel.vmlinux]   [k] group_sched_in
          0.01%  perf     [kernel.vmlinux]   [k] native_write_msr_safe
    
      #
      # (Tip: Search options using a keyword: perf report -h <keyword>)
      #
    Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
    Acked-by: default avatarIngo Molnar <mingo@kernel.org>
    Cc: Andi Kleen <andi@firstfloor.org>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Wang Nan <wangnan0@huawei.com>
    Link: http://lkml.kernel.org/r/1452166913-27046-1-git-send-email-namhyung@kernel.org
    [ Renamed it to perf_tip() and the parameter dirname to dirpath to fix the build on older distros ]
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    14cbfbeb
perf.c 15.1 KB