diff options
| author | Adrian Hunter | 2014-07-14 12:02:25 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2014-07-16 22:57:33 +0200 |
| commit | 1fcb8768636d38cb6fdfeef83a5ee596c4bd9c56 (patch) | |
| tree | ffefb332e8e0e035201fbe4b0f4cef9301ac76d1 /tools/perf/util/machine.c | |
| parent | perf script: Provide additional sample information on generic events (diff) | |
| download | kernel-qcow2-linux-1fcb8768636d38cb6fdfeef83a5ee596c4bd9c56.tar.gz kernel-qcow2-linux-1fcb8768636d38cb6fdfeef83a5ee596c4bd9c56.tar.xz kernel-qcow2-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/machine.c')
| -rw-r--r-- | tools/perf/util/machine.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index e9b943acaa5e..5b8087728f28 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -34,7 +34,7 @@ int machine__init(struct machine *machine, const char *root_dir, pid_t pid) return -ENOMEM; if (pid != HOST_KERNEL_ID) { - struct thread *thread = machine__findnew_thread(machine, 0, + struct thread *thread = machine__findnew_thread(machine, -1, pid); char comm[64]; @@ -286,7 +286,7 @@ static struct thread *__machine__findnew_thread(struct machine *machine, * the full rbtree: */ if (machine->last_match && machine->last_match->tid == tid) { - if (pid && pid != machine->last_match->pid_) + if (pid != -1 && pid != machine->last_match->pid_) machine->last_match->pid_ = pid; return machine->last_match; } @@ -297,7 +297,7 @@ static struct thread *__machine__findnew_thread(struct machine *machine, if (th->tid == tid) { machine->last_match = th; - if (pid && pid != th->pid_) + if (pid != -1 && pid != th->pid_) th->pid_ = pid; return th; } |