Commit 69b7e480 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo

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: default avatarIngo Molnar <mingo@kernel.org>
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Acked-by: default avatarJiri 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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a8763445
......@@ -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;
......
......@@ -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;
}
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment