lkml.org 
[lkml]   [2013]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 26/34] perf script: Print comm, fork and exit events also
    Date
    From: Namhyung Kim <namhyung@kernel.org>

    If --show-task-events option is given, also print internal COMM, FORK
    and EXIT events. It would be helpful for debugging.

    $ perf script --show-task-events
    ...
    swapper 0 [009] 3350640.335261: sched:sched_switch: prev_comm=swapper/9
    sleep 9486 [009] 3350640.335509: PERF_RECORD_COMM: sleep:9486
    sleep 9486 [009] 3350640.335806: sched:sched_stat_runtime: comm=sleep pid=9486
    firefox 2635 [003] 3350641.275896: PERF_RECORD_FORK(2635:9487):(2635:2635)
    firefox 2635 [003] 3350641.275896: sched:sched_process_fork: comm=firefox pid=2635
    sleep 9486 [009] 3350641.336009: PERF_RECORD_EXIT(9486:9486):(9486:9486)

    Signed-off-by: Namhyung Kim <namhyung@kernel.org>
    Suggested-by: Frederic Weisbecker <fweisbec@gmail.com>
    Reviewed-by: David Ahern <dsahern@gmail.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Namhyung Kim <namhyung.kim@lge.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Link: http://lkml.kernel.org/r/1385455873-25865-1-git-send-email-namhyung@kernel.org
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/perf/Documentation/perf-script.txt | 3 +
    tools/perf/builtin-script.c | 105 +++++++++++++++++++++++++++++++
    2 files changed, 108 insertions(+)

    diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
    index e9cbfcddfa3f..67af9b77ea78 100644
    --- a/tools/perf/Documentation/perf-script.txt
    +++ b/tools/perf/Documentation/perf-script.txt
    @@ -203,6 +203,9 @@ OPTIONS
    --show-kernel-path::
    Try to resolve the path of [kernel.kallsyms]

    +--show-task-events
    + Display task related events (e.g. FORK, COMM, EXIT).
    +
    SEE ALSO
    --------
    linkperf:perf-record[1], linkperf:perf-script-perl[1],
    diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
    index 9f3ba4404a14..e2b9aff6506e 100644
    --- a/tools/perf/builtin-script.c
    +++ b/tools/perf/builtin-script.c
    @@ -572,6 +572,7 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
    struct perf_script {
    struct perf_tool tool;
    struct perf_session *session;
    + bool show_task_events;
    };

    static int process_attr(struct perf_tool *tool, union perf_event *event,
    @@ -602,6 +603,101 @@ static int process_attr(struct perf_tool *tool, union perf_event *event,
    return perf_evsel__check_attr(evsel, scr->session);
    }

    +static int process_comm_event(struct perf_tool *tool,
    + 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__first(session->evlist);
    + int ret = -1;
    +
    + thread = machine__findnew_thread(machine, event->comm.pid, event->comm.tid);
    + if (thread == NULL) {
    + pr_debug("problem processing COMM event, skipping it.\n");
    + return -1;
    + }
    +
    + if (perf_event__process_comm(tool, event, sample, machine) < 0)
    + goto out;
    +
    + if (!evsel->attr.sample_id_all) {
    + sample->cpu = 0;
    + sample->time = 0;
    + sample->tid = event->comm.tid;
    + sample->pid = event->comm.pid;
    + }
    + print_sample_start(sample, thread, evsel);
    + perf_event__fprintf(event, stdout);
    + ret = 0;
    +
    +out:
    + return ret;
    +}
    +
    +static int process_fork_event(struct perf_tool *tool,
    + 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__first(session->evlist);
    +
    + if (perf_event__process_fork(tool, event, sample, machine) < 0)
    + return -1;
    +
    + thread = machine__findnew_thread(machine, event->fork.pid, event->fork.tid);
    + if (thread == NULL) {
    + pr_debug("problem processing FORK event, skipping it.\n");
    + return -1;
    + }
    +
    + if (!evsel->attr.sample_id_all) {
    + sample->cpu = 0;
    + sample->time = event->fork.time;
    + sample->tid = event->fork.tid;
    + sample->pid = event->fork.pid;
    + }
    + print_sample_start(sample, thread, evsel);
    + perf_event__fprintf(event, stdout);
    +
    + return 0;
    +}
    +static int process_exit_event(struct perf_tool *tool,
    + 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__first(session->evlist);
    +
    + thread = machine__findnew_thread(machine, event->fork.pid, event->fork.tid);
    + if (thread == NULL) {
    + pr_debug("problem processing EXIT event, skipping it.\n");
    + return -1;
    + }
    +
    + if (!evsel->attr.sample_id_all) {
    + sample->cpu = 0;
    + sample->time = 0;
    + sample->tid = event->comm.tid;
    + sample->pid = event->comm.pid;
    + }
    + print_sample_start(sample, thread, evsel);
    + perf_event__fprintf(event, stdout);
    +
    + if (perf_event__process_exit(tool, event, sample, machine) < 0)
    + return -1;
    +
    + return 0;
    +}
    +
    static void sig_handler(int sig __maybe_unused)
    {
    session_done = 1;
    @@ -613,6 +709,13 @@ static int __cmd_script(struct perf_script *script)

    signal(SIGINT, sig_handler);

    + /* override event processing functions */
    + if (script->show_task_events) {
    + script->tool.comm = process_comm_event;
    + script->tool.fork = process_fork_event;
    + script->tool.exit = process_exit_event;
    + }
    +
    ret = perf_session__process_events(script->session, &script->tool);

    if (debug_mode)
    @@ -1375,6 +1478,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
    "display extended information from perf.data file"),
    OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
    "Show the path of [kernel.kallsyms]"),
    + OPT_BOOLEAN('\0', "show-task-events", &script.show_task_events,
    + "Show the fork/comm/exit events"),
    OPT_END()
    };
    const char * const script_usage[] = {
    --
    1.8.1.4


    \
     
     \ /
      Last update: 2013-11-27 21:41    [W:4.242 / U:0.176 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site