Commit 490c8cc9 authored May 08, 2019 by Jiri Olsa Committed by Arnaldo Carvalho de Melo May 28, 2019

perf script: Add --show-bpf-events to show eBPF related events



Add the --show-bpf-events command line option to show the eBPF related events:

  PERF_RECORD_KSYMBOL
  PERF_RECORD_BPF_EVENT

Usage:

  # perf record -a
  ...
  # perf script --show-bpf-events
  ...
  swapper     0 [000]     0.000000: PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc0ef971d len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
  swapper     0 [000]     0.000000: PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 36
  ...

Committer testing:

  # perf script --show-bpf-events | egrep -i 'PERF_RECORD_(BPF|KSY)'
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc029a6c3 len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 47
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc029c1ae len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 48
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc02ddd1c len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 49
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc02dfc11 len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 50
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc045da0a len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 51
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc04ef4b4 len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 52
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc09e15da len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 53
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc0d2b1a3 len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 54
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc0fd9850 len 381 type 1 flags 0x0 name bpf_prog_819967866022f1e1_sys_enter
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 179
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc0feb1ec len 191 type 1 flags 0x0 name bpf_prog_c1bd85c092d6e4aa_sys_exit
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 180
  ^C[root@quaco pt]# perf evlist
  intel_pt//ku
  dummy:u
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-11-jolsa@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 4f600bcf

tools/perf/Documentation/perf-script.txt

+3 −0

Original line number	Diff line number	Diff line
		@@ -313,6 +313,9 @@ OPTIONS
		--show-round-events
		Display finished round events i.e. events of type PERF_RECORD_FINISHED_ROUND.

		--show-bpf-events
		Display bpf events i.e. events of type PERF_RECORD_KSYMBOL and PERF_RECORD_BPF_EVENT.

		--demangle::
		Demangle symbol names to human readable form. It's enabled by default,
		disable with --no-demangle.

tools/perf/builtin-script.c

+42 −0

Original line number	Diff line number	Diff line
		@@ -1606,6 +1606,7 @@ struct perf_script {
		bool show_namespace_events;
		bool show_lost_events;
		bool show_round_events;
		bool show_bpf_events;
		bool allocated;
		bool per_event_dump;
		struct cpu_map *cpus;
		@@ -2318,6 +2319,41 @@ process_finished_round_event(struct perf_tool *tool __maybe_unused,
		return 0;
		}

		static int
		process_bpf_events(struct perf_tool *tool __maybe_unused,
		union perf_event *event,
		struct perf_sample *sample,
		struct machine *machine)
		{
		struct thread *thread;
		struct perf_script *script = container_of(tool, struct perf_script, tool);
		struct perf_session *session = script->session;
		struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);

		if (machine__process_ksymbol(machine, event, sample) < 0)
		return -1;

		if (!evsel->attr.sample_id_all) {
		perf_event__fprintf(event, stdout);
		return 0;
		}

		thread = machine__findnew_thread(machine, sample->pid, sample->tid);
		if (thread == NULL) {
		pr_debug("problem processing MMAP event, skipping it.\n");
		return -1;
		}

		if (!filter_cpu(sample)) {
		perf_sample__fprintf_start(sample, thread, evsel,
		event->header.type, stdout);
		perf_event__fprintf(event, stdout);
		}

		thread__put(thread);
		return 0;
		}

		static void sig_handler(int sig __maybe_unused)
		{
		session_done = 1;
		@@ -2420,6 +2456,10 @@ static int __cmd_script(struct perf_script *script)
		script->tool.ordered_events = false;
		script->tool.finished_round = process_finished_round_event;
		}
		if (script->show_bpf_events) {
		script->tool.ksymbol = process_bpf_events;
		script->tool.bpf_event = process_bpf_events;
		}

		if (perf_script__setup_per_event_dump(script)) {
		pr_err("Couldn't create the per event dump files\n");
		@@ -3439,6 +3479,8 @@ int cmd_script(int argc, const char **argv)
		"Show lost events (if recorded)"),
		OPT_BOOLEAN('\0', "show-round-events", &script.show_round_events,
		"Show round events (if recorded)"),
		OPT_BOOLEAN('\0', "show-bpf-events", &script.show_bpf_events,
		"Show bpf related events (if recorded)"),
		OPT_BOOLEAN('\0', "per-event-dump", &script.per_event_dump,
		"Dump trace output to files named by the monitored events"),
		OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),

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