Commit 2d9bbf6e authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

perf callchain: Add option to skip ignore symbol when printing callchains 



For tracepoint events, callchains always contain certain functions.
Sometimes it'd be better to skip those functions as they have no value.

Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20161124011114.7102-2-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent dbdebdc5

tools/perf/builtin-sched.c

+2 −1
Original line number Diff line number Diff line
@@ -1876,7 +1876,8 @@ static void timehist_print_sample(struct perf_sched *sched, 


	sample__fprintf_sym(sample, al, 0,

			    EVSEL__PRINT_SYM | EVSEL__PRINT_ONELINE |

			    EVSEL__PRINT_CALLCHAIN_ARROW,

			    EVSEL__PRINT_CALLCHAIN_ARROW |

			    EVSEL__PRINT_SKIP_IGNORED,

			    &callchain_cursor, stdout);



out:

tools/perf/util/evsel.h

+1 −0
Original line number Diff line number Diff line
@@ -392,6 +392,7 @@ int perf_evsel__fprintf(struct perf_evsel *evsel, 
#define EVSEL__PRINT_SRCLINE		(1<<5)

#define EVSEL__PRINT_UNKNOWN_AS_ADDR	(1<<6)

#define EVSEL__PRINT_CALLCHAIN_ARROW	(1<<7)

#define EVSEL__PRINT_SKIP_IGNORED	(1<<8)



struct callchain_cursor;

tools/perf/util/evsel_fprintf.c

+6 −1
Original line number Diff line number Diff line
@@ -109,6 +109,7 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment, 
	int print_srcline = print_opts & EVSEL__PRINT_SRCLINE;

	int print_unknown_as_addr = print_opts & EVSEL__PRINT_UNKNOWN_AS_ADDR;

	int print_arrow = print_opts & EVSEL__PRINT_CALLCHAIN_ARROW;

	int print_skip_ignored = print_opts & EVSEL__PRINT_SKIP_IGNORED;

	char s = print_oneline ? ' ' : '\t';

	bool first = true;
@@ -124,6 +125,9 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment, 
			if (!node)

				break;



			if (node->sym && node->sym->ignore && print_skip_ignored)

				goto next;



			printed += fprintf(fp, "%-*.*s", left_alignment, left_alignment, " ");



			if (print_arrow && !first)
@@ -162,8 +166,9 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment, 
			if (!print_oneline)

				printed += fprintf(fp, "\n");



			callchain_cursor_advance(cursor);

			first = false;

next:

			callchain_cursor_advance(cursor);

		}

	}

CRA Git | Maintained and supported by SUSTech CRA and CCSE