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

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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: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2016-11-24 10:11:13 +09:00 committed by Arnaldo Carvalho de Melo
parent dbdebdc538
commit 2d9bbf6eb3
3 changed files with 9 additions and 2 deletions
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3
tools/perf/builtin-sched.c
View File

@ -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:

1
tools/perf/util/evsel.h
View File

@ -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;

7
tools/perf/util/evsel_fprintf.c
View File

@ -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);
}
}