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Message-Id: <1406300177-31805-6-git-send-email-jolsa@kernel.org>
Date: Fri, 25 Jul 2014 16:56:03 +0200
From: Jiri Olsa <jolsa@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Jiri Olsa <jolsa@...nel.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...nel.org>,
Jean Pihet <jean.pihet@...aro.org>,
Namhyung Kim <namhyung@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [PATCH 05/19] perf tools: Add ordered_events_(new|delete) interface
Adding new ordered events interface to new|delete event buffer:
ordered_events_new - allocate event buffer from the cache
ordered_events_delete - return event buffer to the cache
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jean Pihet <jean.pihet@...aro.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
tools/perf/util/session.c | 169 +++++++++++++++++++++++++++-------------------
1 file changed, 98 insertions(+), 71 deletions(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index ab7a2084d0bf..12b72bc90125 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -466,6 +466,100 @@ static void perf_session_free_sample_buffers(struct perf_session *session)
}
}
+/* The queue is ordered by time */
+static void queue_event(struct ordered_events *oe, struct ordered_event *new)
+{
+ struct ordered_event *last = oe->last;
+ u64 timestamp = new->timestamp;
+ struct list_head *p;
+
+ ++oe->nr_events;
+ oe->last = new;
+
+ if (!last) {
+ list_add(&new->list, &oe->events);
+ oe->max_timestamp = timestamp;
+ return;
+ }
+
+ /*
+ * last event might point to some random place in the list as it's
+ * the last queued event. We expect that the new event is close to
+ * this.
+ */
+ if (last->timestamp <= timestamp) {
+ while (last->timestamp <= timestamp) {
+ p = last->list.next;
+ if (p == &oe->events) {
+ list_add_tail(&new->list, &oe->events);
+ oe->max_timestamp = timestamp;
+ return;
+ }
+ last = list_entry(p, struct ordered_event, list);
+ }
+ list_add_tail(&new->list, &last->list);
+ } else {
+ while (last->timestamp > timestamp) {
+ p = last->list.prev;
+ if (p == &oe->events) {
+ list_add(&new->list, &oe->events);
+ return;
+ }
+ last = list_entry(p, struct ordered_event, list);
+ }
+ list_add(&new->list, &last->list);
+ }
+}
+
+#define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct ordered_event))
+static struct ordered_event *alloc_event(struct ordered_events *oe)
+{
+ struct list_head *cache = &oe->cache;
+ struct ordered_event *new;
+
+ if (!list_empty(cache)) {
+ new = list_entry(cache->next, struct ordered_event, list);
+ list_del(&new->list);
+ } else if (oe->buffer) {
+ 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));
+ if (!oe->buffer)
+ return NULL;
+ list_add(&oe->buffer->list, &oe->to_free);
+
+ /* First entry is abused to maintain the to_free list. */
+ oe->buffer_idx = 2;
+ new = oe->buffer + 1;
+ }
+
+ return new;
+}
+
+static struct ordered_event*
+ordered_events_new(struct ordered_events *oe, u64 timestamp)
+{
+ struct ordered_event *new;
+
+ new = alloc_event(oe);
+ if (new) {
+ new->timestamp = timestamp;
+ queue_event(oe, new);
+ }
+
+ return new;
+}
+
+static void
+ordered_events_delete(struct ordered_events *oe, struct ordered_event *event)
+{
+ list_del(&event->list);
+ list_add(&event->list, &oe->cache);
+ oe->nr_events--;
+}
+
static int perf_session_deliver_event(struct perf_session *session,
union perf_event *event,
struct perf_sample *sample,
@@ -508,10 +602,8 @@ static int ordered_events_flush(struct perf_session *s,
return ret;
}
+ ordered_events_delete(oe, iter);
oe->last_flush = iter->timestamp;
- list_del(&iter->list);
- list_add(&iter->list, &oe->cache);
- oe->nr_events--;
if (show_progress)
ui_progress__update(&prog, 1);
@@ -575,59 +667,10 @@ static int process_finished_round(struct perf_tool *tool,
return ret;
}
-/* The queue is ordered by time */
-static void __queue_event(struct ordered_event *new, struct perf_session *s)
-{
- struct ordered_events *oe = &s->ordered_events;
- struct ordered_event *last = oe->last;
- u64 timestamp = new->timestamp;
- struct list_head *p;
-
- ++oe->nr_events;
- oe->last = new;
-
- if (!last) {
- list_add(&new->list, &oe->events);
- oe->max_timestamp = timestamp;
- return;
- }
-
- /*
- * last event might point to some random place in the list as it's
- * the last queued event. We expect that the new event is close to
- * this.
- */
- if (last->timestamp <= timestamp) {
- while (last->timestamp <= timestamp) {
- p = last->list.next;
- if (p == &oe->events) {
- list_add_tail(&new->list, &oe->events);
- oe->max_timestamp = timestamp;
- return;
- }
- last = list_entry(p, struct ordered_event, list);
- }
- list_add_tail(&new->list, &last->list);
- } else {
- while (last->timestamp > timestamp) {
- p = last->list.prev;
- if (p == &oe->events) {
- list_add(&new->list, &oe->events);
- return;
- }
- last = list_entry(p, struct ordered_event, list);
- }
- list_add(&new->list, &last->list);
- }
-}
-
-#define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct ordered_event))
-
int perf_session_queue_event(struct perf_session *s, union perf_event *event,
struct perf_sample *sample, u64 file_offset)
{
struct ordered_events *oe = &s->ordered_events;
- struct list_head *cache = &oe->cache;
u64 timestamp = sample->time;
struct ordered_event *new;
@@ -639,28 +682,12 @@ int perf_session_queue_event(struct perf_session *s, union perf_event *event,
return -EINVAL;
}
- if (!list_empty(cache)) {
- new = list_entry(cache->next, struct ordered_event, list);
- list_del(&new->list);
- } else if (oe->buffer) {
- 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));
- if (!oe->buffer)
- return -ENOMEM;
- list_add(&oe->buffer->list, &oe->to_free);
- oe->buffer_idx = 2;
- new = oe->buffer + 1;
- }
+ new = ordered_events_new(oe, timestamp);
+ if (!new)
+ return -ENOMEM;
- new->timestamp = timestamp;
new->file_offset = file_offset;
new->event = event;
-
- __queue_event(new, s);
-
return 0;
}
--
1.8.3.1
--
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