Commit-ID: 8d99a6ceebe862ac4afd832cdab332ee7b3b5599
Gitweb: http://git.kernel.org/tip/8d99a6ceebe862ac4afd832cdab332ee7b3b5599
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Wed, 11 Jun 2014 15:09:35 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 12 Aug 2014 12:02:57 -0300
perf tools: Limit ordered events queue size
Add limit to the ordered events queue allocation. This way we will be
able to control the size of the queue buffers.
There's no limit at the moment (it's set to (u64) -1). The config code
will come in following patches.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: David Ahern <dsahern@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jean Pihet <jean.pihet@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-lw1ny3mk4ctb6su5ght5rsng@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/session.c | 12 +++++++++---
tools/perf/util/session.h | 2 ++
2 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 72c7b0d..8d4538c 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -78,6 +78,8 @@ struct perf_session *perf_session__new(struct perf_data_file *file,
INIT_LIST_HEAD(&session->ordered_events.events);
INIT_LIST_HEAD(&session->ordered_events.cache);
INIT_LIST_HEAD(&session->ordered_events.to_free);
+ session->ordered_events.max_alloc_size = (u64) -1;
+ session->ordered_events.cur_alloc_size = 0;
machines__init(&session->machines);
if (file) {
@@ -518,7 +520,7 @@ static void queue_event(struct ordered_events *oe, struct ordered_event *new)
static struct ordered_event *alloc_event(struct ordered_events *oe)
{
struct list_head *cache = &oe->cache;
- struct ordered_event *new;
+ struct ordered_event *new = NULL;
if (!list_empty(cache)) {
new = list_entry(cache->next, struct ordered_event, list);
@@ -527,10 +529,14 @@ static struct ordered_event *alloc_event(struct ordered_events *oe)
new = oe->buffer + oe->buffer_idx;
if (++oe->buffer_idx == MAX_SAMPLE_BUFFER)
oe->buffer = NULL;
- } else {
- oe->buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
+ } else if (oe->cur_alloc_size < oe->max_alloc_size) {
+ size_t size = MAX_SAMPLE_BUFFER * sizeof(*new);
+
+ oe->buffer = malloc(size);
if (!oe->buffer)
return NULL;
+
+ oe->cur_alloc_size += size;
list_add(&oe->buffer->list, &oe->to_free);
/* First entry is abused to maintain the to_free list. */
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 419eb50..e2fbaf2 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -20,6 +20,8 @@ struct ordered_events {
u64 last_flush;
u64 next_flush;
u64 max_timestamp;
+ u64 max_alloc_size;
+ u64 cur_alloc_size;
struct list_head events;
struct list_head cache;
struct list_head to_free;
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|