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perf script: Add a setting for maximum stack depth

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

Signed-off-by: Adrian 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-09-25 16:15:49 +03:00 committed by Arnaldo Carvalho de Melo
parent 96b40f3c05
commit 03cd1fed2b
2 changed files with 5 additions and 3 deletions
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6
tools/perf/builtin-script.c
View file

@ -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))

2
tools/perf/util/session.c
View file

@ -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;