diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2014-11-11 17:16:41 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-11-19 18:37:26 +0300 |
| commit | a84808083688d82d7f1e5786ccf5df0ff7d448cb (patch) | |
| tree | 681fb4c9ae7320ab1192f92e1c153ab35c90bf8e /tools/perf | |
| parent | 4b34f19b66ad29f10af90ad396131adbd16d737f (diff) | |
| download | linux-a84808083688d82d7f1e5786ccf5df0ff7d448cb.tar.xz | |
perf tools: Only override the default :tid comm entry
Events may still be ordered even if there are no timestamps e.g. if the
data is recorded per-thread.
Also synthesized COMM events have a timestamp of zero.
Consequently it is better to keep comm entries even if they have a
timestamp of zero.
However, when a struct thread is created the command string is not known
and a comm entry with a string of the form ":<tid>" is used.
In that case thread->comm_set is false and the comm entry should be
overridden.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1415715423-15563-4-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/thread.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c index a2157f0ef1df..9ebc8b1f9be5 100644 --- a/tools/perf/util/thread.c +++ b/tools/perf/util/thread.c @@ -103,15 +103,14 @@ struct comm *thread__exec_comm(const struct thread *thread) return last; } -/* CHECKME: time should always be 0 if event aren't ordered */ int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp, bool exec) { struct comm *new, *curr = thread__comm(thread); int err; - /* Override latest entry if it had no specific time coverage */ - if (!curr->start && !curr->exec) { + /* Override the default :tid entry */ + if (!thread->comm_set) { err = comm__override(curr, str, timestamp, exec); if (err) return err; |