On Mon, Oct 05, 2015 at 06:03:35PM -0300, Arnaldo Carvalho de Melo wrote:
> From: Arnaldo Carvalho de Melo <a...@redhat.com>
> 
> Which is the most common default found in other similar tools.

I think it's more useful to change the default only when --children is
used.  And there's a related issue too - please see below link:

  https://lkml.org/lkml/2014/8/14/49

Thanks,
Namhyung


> 
> Requested-by: Ingo Molnar <mi...@kernel.org>
> Cc: Adrian Hunter <adrian.hun...@intel.com>
> Cc: Borislav Petkov <b...@suse.de>
> Cc: Chandler Carruth <chandl...@gmail.com>
> Cc: David Ahern <dsah...@gmail.com>
> Cc: Frederic Weisbecker <fweis...@gmail.com>
> Cc: Jiri Olsa <jo...@redhat.com>
> Cc: Namhyung Kim <namhy...@kernel.org>
> Cc: Stephane Eranian <eran...@google.com>
> Cc: Wang Nan <wangn...@huawei.com>
> Link: https://www.youtube.com/watch?v=nXaxk27zwlk
> Link: http://lkml.kernel.org/n/tip-v8lq36aispvdwgxdmt9p9...@git.kernel.org
> Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
> ---
>  tools/perf/Documentation/perf-report.txt | 2 +-
>  tools/perf/builtin-report.c              | 4 ++--
>  tools/perf/util/util.c                   | 4 ++--
>  3 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/Documentation/perf-report.txt 
> b/tools/perf/Documentation/perf-report.txt
> index ce499035e6d8..e4fdeeb51123 100644
> --- a/tools/perf/Documentation/perf-report.txt
> +++ b/tools/perf/Documentation/perf-report.txt
> @@ -192,7 +192,7 @@ OPTIONS
>       when available. Usually more convenient to use --branch-history
>       for this.
>  
> -     Default: fractal,0.5,callee,function.
> +     Default: graph,0.5,caller
>  
>  --children::
>       Accumulate callchain of children to parent entry so that then can
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index b5623639f67d..3b23b25d1589 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -633,7 +633,7 @@ int cmd_report(int argc, const char **argv, const char 
> *prefix __maybe_unused)
>       bool has_br_stack = false;
>       int branch_mode = -1;
>       bool branch_call_mode = false;
> -     char callchain_default_opt[] = "fractal,0.5,callee";
> +     char callchain_default_opt[] = "graph,0.5,caller";
>       const char * const report_usage[] = {
>               "perf report [<options>]",
>               NULL
> @@ -701,7 +701,7 @@ int cmd_report(int argc, const char **argv, const char 
> *prefix __maybe_unused)
>                   "Only display entries with parent-match"),
>       OPT_CALLBACK_DEFAULT('g', "call-graph", &report, 
> "output_type,min_percent[,print_limit],call_order[,branch]",
>                    "Display callchains using output_type (graph, flat, 
> fractal, or none) , min percent threshold, optional print limit, callchain 
> order, key (function or address), add branches. "
> -                  "Default: fractal,0.5,callee,function", 
> &report_parse_callchain_opt, callchain_default_opt),
> +                  "Default: graph,0.5,caller", &report_parse_callchain_opt, 
> callchain_default_opt),
>       OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
>                   "Accumulate callchains of children and show total overhead 
> as well"),
>       OPT_INTEGER(0, "max-stack", &report.max_stack,
> diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
> index ce465b259e52..c1bf9ff210b0 100644
> --- a/tools/perf/util/util.c
> +++ b/tools/perf/util/util.c
> @@ -17,9 +17,9 @@
>  #include "callchain.h"
>  
>  struct callchain_param       callchain_param = {
> -     .mode   = CHAIN_GRAPH_REL,
> +     .mode   = CHAIN_GRAPH_ABS,
>       .min_percent = 0.5,
> -     .order  = ORDER_CALLEE,
> +     .order  = ORDER_CALLER,
>       .key    = CCKEY_FUNCTION
>  };
>  
> -- 
> 2.1.0
> 
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