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perf/urgent fixes:

Browse Source 
- In some cases where perf_event.fork.{pid,tid} should be used we were instead
   using perf_event.comm.{pid,tid}, which is not a problem for for the 'pid'
   case, that sits in the same place in these union_perf_event members, but
   comm.tid sits where fork.ppid is, oops.
 
   These cases were considered as (potentially) problematic:
 
    - 'perf script' with !sample_id_all, i.e. only non old kernels without
       perf_event_attr.sample_id_all.
 
    - intel_pt could be affected when decoding without timestamps, as the exit
      event is only used to flush out data which anyway gets flushed at the
      end of the session.
 
    - intel_bts also uses the exit event to flush data which would probably not
      cause errors as it would get flushed at the end of the session instead.
 
   Fix it. (Adrian Hunter)
 
 - Due to relaxing the compiler checks for bison generated files, we missed
   updating one parse_events_add_pmu() caller when this function had its
   prototype changed, fix it. (Jiri Olsa)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

  - In some cases where perf_event.fork.{pid,tid} should be used we were instead
    using perf_event.comm.{pid,tid}, which is not a problem for for the 'pid'
    case, that sits in the same place in these union_perf_event members, but
    comm.tid sits where fork.ppid is, oops.

    These cases were considered as (potentially) problematic:

     - 'perf script' with !sample_id_all, i.e. only non old kernels without
        perf_event_attr.sample_id_all.

     - intel_pt could be affected when decoding without timestamps, as the exit
       event is only used to flush out data which anyway gets flushed at the
       end of the session.

     - intel_bts also uses the exit event to flush data which would probably not
       cause errors as it would get flushed at the end of the session instead.

    Fix it. (Adrian Hunter)

  - Due to relaxing the compiler checks for bison generated files, we missed
    updating one parse_events_add_pmu() caller when this function had its
    prototype changed, fix it. (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-09-04 11:00:56 +02:00
commit 21adf76e90
4 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
tools/perf/builtin-script.c
View File

@ -768,8 +768,8 @@ static int process_exit_event(struct perf_tool *tool,
if (!evsel->attr.sample_id_all) {
sample->cpu = 0;
sample->time = 0;
sample->tid = event->comm.tid;
sample->pid = event->comm.pid;
sample->tid = event->fork.tid;
sample->pid = event->fork.pid;
}
print_sample_start(sample, thread, evsel);
perf_event__fprintf(event, stdout);

2
tools/perf/util/intel-bts.c
View File

@ -623,7 +623,7 @@ static int intel_bts_process_event(struct perf_session *session,
if (err)
return err;
if (event->header.type == PERF_RECORD_EXIT) {
err = intel_bts_process_tid_exit(bts, event->comm.tid);
err = intel_bts_process_tid_exit(bts, event->fork.tid);
if (err)
return err;
}

2
tools/perf/util/intel-pt.c
View File

@ -1494,7 +1494,7 @@ static int intel_pt_process_event(struct perf_session *session,
if (pt->timeless_decoding) {
if (event->header.type == PERF_RECORD_EXIT) {
err = intel_pt_process_timeless_queues(pt,
event->comm.tid,
event->fork.tid,
sample->time);
}
} else if (timestamp) {

2
tools/perf/util/parse-events.y
View File

@ -255,7 +255,7 @@ PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF sep_dc
list_add_tail(&term->list, head);
ALLOC_LIST(list);
ABORT_ON(parse_events_add_pmu(list, &data->idx, "cpu", head));
ABORT_ON(parse_events_add_pmu(data, list, "cpu", head));
parse_events__free_terms(head);
$$ = list;
}