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| author | Namhyung Kim <namhyung@kernel.org> | 2016-12-08 17:47:51 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-12-15 22:25:44 +0300 |
| commit | 3bc2fa9cb829ccf6527e7117d9af769d93ee6d39 (patch) | |
| tree | 5dbb24c56276a631354c2d2473c405903b7700d2 | |
| parent | 96039c7c52e03b7d6dd773664e74b79e3ae9856a (diff) | |
| download | linux-3bc2fa9cb829ccf6527e7117d9af769d93ee6d39.tar.xz | |
perf sched timehist: Introduce struct idle_time_data
The struct idle_time_data is to keep idle stats with callchains entering
to the idle task. The normal thread_runtime calculation is done
transparently since it extends the struct thread_runtime.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20161208144755.16673-3-namhyung@kernel.org
[ Align struct field names ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/builtin-sched.c | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 966eddce1609..e108b0f6a246 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -230,6 +230,15 @@ struct evsel_runtime { u32 ncpu; /* highest cpu slot allocated */ }; +/* per cpu idle time data */ +struct idle_thread_runtime { + struct thread_runtime tr; + struct thread *last_thread; + struct rb_root sorted_root; + struct callchain_root callchain; + struct callchain_cursor cursor; +}; + /* track idle times per cpu */ static struct thread **idle_threads; static int idle_max_cpu; @@ -1997,13 +2006,31 @@ static void save_task_callchain(struct perf_sched *sched, } } +static int init_idle_thread(struct thread *thread) +{ + struct idle_thread_runtime *itr; + + thread__set_comm(thread, idle_comm, 0); + + itr = zalloc(sizeof(*itr)); + if (itr == NULL) + return -ENOMEM; + + init_stats(&itr->tr.run_stats); + callchain_init(&itr->callchain); + callchain_cursor_reset(&itr->cursor); + thread__set_priv(thread, itr); + + return 0; +} + /* * Track idle stats per cpu by maintaining a local thread * struct for the idle task on each cpu. */ static int init_idle_threads(int ncpu) { - int i; + int i, ret; idle_threads = zalloc(ncpu * sizeof(struct thread *)); if (!idle_threads) @@ -2017,7 +2044,9 @@ static int init_idle_threads(int ncpu) if (idle_threads[i] == NULL) return -ENOMEM; - thread__set_comm(idle_threads[i], idle_comm, 0); + ret = init_idle_thread(idle_threads[i]); + if (ret < 0) + return ret; } return 0; @@ -2064,8 +2093,8 @@ static struct thread *get_idle_thread(int cpu) idle_threads[cpu] = thread__new(0, 0); if (idle_threads[cpu]) { - idle_threads[cpu]->tid = 0; - thread__set_comm(idle_threads[cpu], idle_comm, 0); + if (init_idle_thread(idle_threads[cpu]) < 0) + return NULL; } } |