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| author |   Adrian Hunter <adrian.hunter@intel.com> | 2014-07-14 13:02:25 +0300 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-07-16 17:57:33 -0300 |
| commit | 1fcb8768636d38cb6fdfeef83a5ee596c4bd9c56 (patch) | |
| tree | ffefb332e8e0e035201fbe4b0f4cef9301ac76d1 /tools/perf/util/thread.c | |
| parent | perf script: Provide additional sample information on generic events (diff) | |
| download | wireguard-linux-1fcb8768636d38cb6fdfeef83a5ee596c4bd9c56.tar.xz wireguard-linux-1fcb8768636d38cb6fdfeef83a5ee596c4bd9c56.zip | |
perf machine: Fix the value used for unknown pids
The value used for unknown pids cannot be zero because that is used by
the "idle" task.
Use -1 instead. Also handle the unknown pid case when creating map
groups.
Note that, threads with an unknown pid should not occur because fork (or
synthesized) events precede the thread's existence.
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/1405332185-4050-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/thread.c')
| -rw-r--r-- | tools/perf/util/thread.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c index 2fde0d5e40b5..7a32f447a8e7 100644 --- a/tools/perf/util/thread.c +++ b/tools/perf/util/thread.c @@ -13,7 +13,7 @@ int thread__init_map_groups(struct thread *thread, struct machine *machine) struct thread *leader; pid_t pid = thread->pid_; - if (pid == thread->tid) { + if (pid == thread->tid || pid == -1) { thread->mg = map_groups__new(); } else { leader = machine__findnew_thread(machine, pid, pid); |