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Subject[PATCH 3/5] perf report: Change default callchain parameters
The default callchain parameters are set to use the flat mode and never
filter any overhead threshold of backtrace.

But flat mode is boring compared to graph mode.
Also the number of callchains may be very high if none is

Let's change this to set the graph view and a minimum overhead of 0.5%
as default parameters.

Reported-by: Ingo Molnar <>
Signed-off-by: Frederic Weisbecker <>
tools/perf/builtin-report.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 3db99fd..8bd5865 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -59,10 +59,10 @@ static regex_t parent_regex;

static int exclude_other = 1;

-static char callchain_default_opt[] = "flat,0";
+static char callchain_default_opt[] = "graph,0.5";
static int callchain;
static enum chain_mode callchain_mode;
-static double callchain_min_percent = 0.0;
+static double callchain_min_percent = 0.5;

static u64 sample_type;


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