From: Namhyung Kim Date: Wed, 16 Nov 2016 06:06:28 +0000 (+0900) Subject: perf evsel: Support printing callchains with arrows X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=69b7e48070ca2ecee7498166259b5826b22e8b2e;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Namhyung Kim Acked-by: Jiri Olsa Cc: Andi Kleen Cc: David Ahern Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/20161116060634.28477-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- 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; } }