diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2016-11-16 07:06:28 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-11-23 14:44:07 +0100 |
| commit | 69b7e48070ca2ecee7498166259b5826b22e8b2e (patch) | |
| tree | 8c2915fe3fe520f872ecf61fbe5a20161f0dca87 /tools/perf | |
| parent | perf symbols: Print symbol offsets conditionally (diff) | |
| download | linux-69b7e48070ca2ecee7498166259b5826b22e8b2e.tar.xz linux-69b7e48070ca2ecee7498166259b5826b22e8b2e.zip | |
perf evsel: Support printing callchains with arrows
The EVSEL__PRINT_CALLCHAIN_ARROW options can be used to print callchains
with arrows for readability. It will be used 'sched timehist' command
like below:
__schedule <- schedule <- schedule_timeout <- rcu_gp_kthread <- kthread <- ret_from_fork
__schedule <- schedule <- schedule_timeout <- rcu_gp_kthread <- kthread <- ret_from_fork
__schedule <- schedule <- worker_thread <- kthread <- ret_from_fork
Suggested-and-Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20161116060634.28477-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/evsel.h | 1 | ||||
| -rw-r--r-- | tools/perf/util/evsel_fprintf.c | 6 |
2 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 8cd7cd227483..27fa3a343577 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -391,6 +391,7 @@ int perf_evsel__fprintf(struct perf_evsel *evsel, #define EVSEL__PRINT_ONELINE (1<<4) #define EVSEL__PRINT_SRCLINE (1<<5) #define EVSEL__PRINT_UNKNOWN_AS_ADDR (1<<6) +#define EVSEL__PRINT_CALLCHAIN_ARROW (1<<7) struct callchain_cursor; diff --git a/tools/perf/util/evsel_fprintf.c b/tools/perf/util/evsel_fprintf.c index ccb602397b60..53bb614feafb 100644 --- a/tools/perf/util/evsel_fprintf.c +++ b/tools/perf/util/evsel_fprintf.c @@ -108,7 +108,9 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment, int print_oneline = print_opts & EVSEL__PRINT_ONELINE; 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; char s = print_oneline ? ' ' : '\t'; + bool first = true; if (sample->callchain) { struct addr_location node_al; @@ -124,6 +126,9 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment, printed += fprintf(fp, "%-*.*s", left_alignment, left_alignment, " "); + if (print_arrow && !first) + printed += fprintf(fp, " <-"); + if (print_ip) printed += fprintf(fp, "%c%16" PRIx64, s, node->ip); @@ -158,6 +163,7 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment, printed += fprintf(fp, "\n"); callchain_cursor_advance(cursor); + first = false; } } |