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perf machine: Optimize a bit the machine__findnew_thread() methods 

In some cases we already have calculated the hash bucket, so reuse it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Lukasz Odzioba <lukasz.odzioba@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-800zehjsyy03er4s4jf0e99v@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2017-09-14 16:16:34 -03:00
parent 91e467bc56
commit 75e45e4320
1 changed files with 3 additions and 3 deletions
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6
tools/perf/util/machine.c
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@ -399,10 +399,10 @@ out_err:
* lookup/new thread inserted.
*/
static struct thread *____machine__findnew_thread(struct machine *machine,
struct threads *threads,
pid_t pid, pid_t tid,
bool create)
{
struct threads *threads = machine__threads(machine, tid);
struct rb_node **p = &threads->entries.rb_node;
struct rb_node *parent = NULL;
struct thread *th;
@ -473,7 +473,7 @@ static struct thread *____machine__findnew_thread(struct machine *machine,
struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid)
{
return ____machine__findnew_thread(machine, pid, tid, true);
return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true);
}
struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
@ -495,7 +495,7 @@ struct thread *machine__find_thread(struct machine *machine, pid_t pid,
struct thread *th;
pthread_rwlock_rdlock(&threads->lock);
th = ____machine__findnew_thread(machine, pid, tid, false);
th = ____machine__findnew_thread(machine, threads, pid, tid, false);
pthread_rwlock_unlock(&threads->lock);
return th;
}