perf data: Add support for setting ordered_events queue size

Adding support to limit the size of ordered_events queue, so we could
control allocation size of perf data files without proper finished round
events.

Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jeremie Galarneau <jgalar@efficios.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1429372220-6406-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index 4f942b3..b35c8d6 100644 (file)
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -74,6 +74,9 @@ struct convert {
 
        u64                     events_size;
        u64                     events_count;
+
+       /* Ordered events configured queue size. */
+       u64                     queue_size;
 };
 
 static int value_set(struct bt_ctf_field_type *type,
@@ -968,6 +971,18 @@ static int ctf_writer__flush_streams(struct ctf_writer *cw)
        return ret;
 }
 
+static int convert__config(const char *var, const char *value, void *cb)
+{
+       struct convert *c = cb;
+
+       if (!strcmp(var, "convert.queue-size")) {
+               c->queue_size = perf_config_u64(var, value);
+               return 0;
+       }
+
+       return perf_default_config(var, value, cb);
+}
+
 int bt_convert__perf2ctf(const char *input, const char *path, bool force)
 {
        struct perf_session *session;
@@ -994,6 +1009,8 @@ int bt_convert__perf2ctf(const char *input, const char *path, bool force)
        struct ctf_writer *cw = &c.writer;
        int err = -1;
 
+       perf_config(convert__config, &c);
+
        /* CTF writer */
        if (ctf_writer__init(cw, path))
                return -1;
@@ -1003,6 +1020,11 @@ int bt_convert__perf2ctf(const char *input, const char *path, bool force)
        if (!session)
                goto free_writer;
 
+       if (c.queue_size) {
+               ordered_events__set_alloc_size(&session->ordered_events,
+                                              c.queue_size);
+       }
+
        /* CTF writer env/clock setup  */
        if (ctf_writer__setup_env(cw, session))
                goto free_session;