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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@kernel.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-lw1ny3mk4ctb6su5ght5rsng@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2014-06-11 15:09:35 +02:00 committed by Arnaldo Carvalho de Melo
parent d8836b5d17
commit 8d99a6ceeb
2 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
tools/perf/util/session.c
View File

@ -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. */

2
tools/perf/util/session.h
View File

@ -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;