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Commit 03cd1fed authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf script: Add a setting for maximum stack depth 



Add a setting for maximum stack depth in preparation for allowing for
synthesized callchains.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-19-git-send-email-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 96b40f3c

tools/perf/builtin-script.c

+4 −2
Original line number Diff line number Diff line
@@ -33,6 +33,8 @@ static bool nanosecs; 
static const char		*cpu_list;

static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);



static unsigned int scripting_max_stack = PERF_MAX_STACK_DEPTH;



enum perf_output_field {

	PERF_OUTPUT_COMM            = 1U << 0,

	PERF_OUTPUT_TID             = 1U << 1,
@@ -475,7 +477,7 @@ static void print_sample_bts(union perf_event *event, 
			}

		}

		perf_evsel__print_ip(evsel, sample, al, print_opts,

				     PERF_MAX_STACK_DEPTH);

				     scripting_max_stack);

	}



	/* print branch_to information */
@@ -552,7 +554,7 @@ static void process_event(union perf_event *event, struct perf_sample *sample, 


		perf_evsel__print_ip(evsel, sample, al,

				     output[attr->type].print_ip_opts,

				     PERF_MAX_STACK_DEPTH);

				     scripting_max_stack);

	}



	if (PRINT_FIELD(IREGS))

tools/perf/util/session.c

+1 −1
Original line number Diff line number Diff line
@@ -1800,7 +1800,7 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample, 


		if (thread__resolve_callchain(al->thread, evsel,

					      sample, NULL, NULL,

					      PERF_MAX_STACK_DEPTH) != 0) {

					      stack_depth) != 0) {

			if (verbose)

				error("Failed to resolve callchain. Skipping\n");

			return;