perf tools: Try to show pretty printed output for dynamic sort keys
authorNamhyung Kim <namhyung@kernel.org>
Tue, 22 Dec 2015 17:07:03 +0000 (02:07 +0900)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 6 Jan 2016 23:11:11 +0000 (20:11 -0300)
commit60517d28fbd91629686dcf9a39aef4e068a3d5f6
tree6a2341ae2773a975fed1d81f3a18be44e6ad6673
parentc7c2a5e40f17ab3b14716d4f08d03792a9b683e7
perf tools: Try to show pretty printed output for dynamic sort keys

Each tracepoint event has format string for print to improve
readability.  Try to parse the output and match the field name.  If it
finds one, use that for the result.  If not, fallbacks to the original
output.

For example, sort on kmem:kmalloc.gfp_flags looks like below:
(Note: libtraceevent plugins are not installed on my system.  They might
affect the output below)

Before:
  # Overhead  Command   gfp_flags
  # ........  .......  ..........
  #
      99.89%  perf          32848
       0.06%  sleep           208
       0.03%  perf          32976
       0.01%  perf            208

After:
  # Overhead  Command            gfp_flags
  # ........  .......  ...................
  #
      99.89%  perf       GFP_NOFS|GFP_ZERO
       0.06%  sleep             GFP_KERNEL
       0.03%  perf     GFP_KERNEL|GFP_ZERO
       0.01%  perf              GFP_KERNEL

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1450804030-29193-7-git-send-email-namhyung@kernel.org
[ Fixed clash with earlier, updated patch in this patchkit ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/hist.c
tools/perf/util/sort.c
tools/perf/util/sort.h