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Andi Kleenacmel
Andi Kleen
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acmel
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tools script: Add --call-trace and --call-ret-trace
Add short cut options to print PT call trace and call-ret-trace, for calls and call and returns. Roughly corresponds to ftrace function tracer and function graph tracer. Just makes these common use cases nicer to use. % perf record -a -e intel_pt// sleep 1 % perf script --call-trace perf 900 [000] 194167.205652203: ([kernel.kallsyms]) perf_pmu_enable perf 900 [000] 194167.205652203: ([kernel.kallsyms]) __x86_indirect_thunk_rax perf 900 [000] 194167.205652203: ([kernel.kallsyms]) event_filter_match perf 900 [000] 194167.205652203: ([kernel.kallsyms]) group_sched_in perf 900 [000] 194167.205652203: ([kernel.kallsyms]) __x86_indirect_thunk_rax perf 900 [000] 194167.205652203: ([kernel.kallsyms]) event_sched_in.isra.107 perf 900 [000] 194167.205652203: ([kernel.kallsyms]) perf_event_set_state.part.71 perf 900 [000] 194167.205652203: ([kernel.kallsyms]) perf_event_update_time perf 900 [000] 194167.205652203: ([kernel.kallsyms]) perf_pmu_disable perf 900 [000] 194167.205652203: ([kernel.kallsyms]) perf_log_itrace_start perf 900 [000] 194167.205652203: ([kernel.kallsyms]) __x86_indirect_thunk_rax perf 900 [000] 194167.205652203: ([kernel.kallsyms]) perf_event_update_userpage % perf script --call-ret-trace perf 900 [000] 194167.205652203: tr strt ([unknown]) pt_config perf 900 [000] 194167.205652203: return ([kernel.kallsyms]) pt_config perf 900 [000] 194167.205652203: return ([kernel.kallsyms]) pt_event_add perf 900 [000] 194167.205652203: call ([kernel.kallsyms]) perf_pmu_enable perf 900 [000] 194167.205652203: return ([kernel.kallsyms]) perf_pmu_nop_void perf 900 [000] 194167.205652203: return ([kernel.kallsyms]) event_sched_in.isra.107 perf 900 [000] 194167.205652203: call ([kernel.kallsyms]) __x86_indirect_thunk_rax perf 900 [000] 194167.205652203: return ([kernel.kallsyms]) perf_pmu_nop_int perf 900 [000] 194167.205652203: return ([kernel.kallsyms]) group_sched_in perf 900 [000] 194167.205652203: call ([kernel.kallsyms]) event_filter_match perf 900 [000] 194167.205652203: return ([kernel.kallsyms]) event_filter_match perf 900 [000] 194167.205652203: call ([kernel.kallsyms]) group_sched_in perf 900 [000] 194167.205652203: call ([kernel.kallsyms]) __x86_indirect_thunk_rax perf 900 [000] 194167.205652203: return ([kernel.kallsyms]) perf_pmu_nop_txn perf 900 [000] 194167.205652203: call ([kernel.kallsyms]) event_sched_in.isra.107 perf 900 [000] 194167.205652203: call ([kernel.kallsyms]) perf_event_set_state.part.71 Signed-off-by: Andi Kleen <ak@linux.intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Leo Yan <leo.yan@linaro.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Kim Phillips <kim.phillips@arm.com> Link: http://lkml.kernel.org/r/20180920180540.14039-4-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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‎tools/perf/Documentation/perf-script.txt

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@@ -390,6 +390,13 @@ include::itrace.txt[]
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--xed::
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Run xed disassembler on output. Requires installing the xed disassembler.
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--call-trace::
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Show call stream for intel_pt traces. The CPUs are interleaved, but
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can be filtered with -C.
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--call-ret-trace::
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Show call and return stream for intel_pt traces.
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SEE ALSO
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--------
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linkperf:perf-record[1], linkperf:perf-script-perl[1],

‎tools/perf/builtin-script.c

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@@ -3122,6 +3122,26 @@ static int parse_xed(const struct option *opt __maybe_unused,
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return 0;
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}
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static int parse_call_trace(const struct option *opt __maybe_unused,
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const char *str __maybe_unused,
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int unset __maybe_unused)
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{
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parse_output_fields(NULL, "-ip,-addr,-event,-period,+callindent", 0);
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itrace_parse_synth_opts(opt, "cewp", 0);
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nanosecs = true;
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return 0;
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}
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static int parse_callret_trace(const struct option *opt __maybe_unused,
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const char *str __maybe_unused,
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int unset __maybe_unused)
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{
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parse_output_fields(NULL, "-ip,-addr,-event,-period,+callindent,+flags", 0);
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itrace_parse_synth_opts(opt, "crewp", 0);
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nanosecs = true;
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return 0;
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}
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int cmd_script(int argc, const char **argv)
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{
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bool show_full_info = false;
@@ -3213,6 +3233,10 @@ int cmd_script(int argc, const char **argv)
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"Decode instructions from itrace", parse_insn_trace),
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OPT_CALLBACK_OPTARG(0, "xed", NULL, NULL, NULL,
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"Run xed disassembler on output", parse_xed),
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OPT_CALLBACK_OPTARG(0, "call-trace", &itrace_synth_opts, NULL, NULL,
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"Decode calls from from itrace", parse_call_trace),
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OPT_CALLBACK_OPTARG(0, "call-ret-trace", &itrace_synth_opts, NULL, NULL,
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"Decode calls and returns from itrace", parse_callret_trace),
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OPT_STRING(0, "stop-bt", &symbol_conf.bt_stop_list_str, "symbol[,symbol...]",
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"Stop display of callgraph at these symbols"),
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OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),

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