CALLCHAIN_DEFAULT_OPT 2556 tools/perf/builtin-c2c.c #define CALLCHAIN_DEFAULT_OPT  "graph,0.5,caller,function,percent"
CALLCHAIN_DEFAULT_OPT 1035 tools/perf/builtin-report.c #define CALLCHAIN_DEFAULT_OPT  "graph,0.5,caller,function,percent"