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Subject[PATCH 10/17] perf tools: Create ordered-events object
Date
Move ordered events code into separated object ordered-events.[ch].

Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
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>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/Makefile.perf | 2 +
tools/perf/util/ordered-events.c | 193 +++++++++++++++++++++++++++++++++++++
tools/perf/util/ordered-events.h | 43 +++++++++
tools/perf/util/session.c | 203 ---------------------------------------
tools/perf/util/session.h | 17 +---
5 files changed, 239 insertions(+), 219 deletions(-)
create mode 100644 tools/perf/util/ordered-events.c
create mode 100644 tools/perf/util/ordered-events.h

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 9670a16..1351cfe 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -263,6 +263,7 @@ LIB_H += util/xyarray.h
LIB_H += util/header.h
LIB_H += util/help.h
LIB_H += util/session.h
+LIB_H += util/ordered-events.h
LIB_H += util/strbuf.h
LIB_H += util/strlist.h
LIB_H += util/strfilter.h
@@ -345,6 +346,7 @@ LIB_OBJS += $(OUTPUT)util/machine.o
LIB_OBJS += $(OUTPUT)util/map.o
LIB_OBJS += $(OUTPUT)util/pstack.o
LIB_OBJS += $(OUTPUT)util/session.o
+LIB_OBJS += $(OUTPUT)util/ordered-events.o
LIB_OBJS += $(OUTPUT)util/comm.o
LIB_OBJS += $(OUTPUT)util/thread.o
LIB_OBJS += $(OUTPUT)util/thread_map.o
diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
new file mode 100644
index 0000000..2d943eb
--- /dev/null
+++ b/tools/perf/util/ordered-events.c
@@ -0,0 +1,193 @@
+#include <linux/list.h>
+#include "ordered-events.h"
+#include "evlist.h"
+#include "session.h"
+#include "asm/bug.h"
+
+static void queue_event(struct ordered_events_queue *q, struct ordered_event *new)
+{
+ struct ordered_event *last = q->last;
+ u64 timestamp = new->timestamp;
+ struct list_head *p;
+
+ ++q->nr_events;
+ q->last = new;
+
+ if (!last) {
+ list_add(&new->list, &q->events);
+ q->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 clqe to
+ * this.
+ */
+ if (last->timestamp <= timestamp) {
+ while (last->timestamp <= timestamp) {
+ p = last->list.next;
+ if (p == &q->events) {
+ list_add_tail(&new->list, &q->events);
+ q->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 == &q->events) {
+ list_add(&new->list, &q->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_queue *q)
+{
+ struct list_head *cache = &q->cache;
+ struct ordered_event *new = NULL;
+
+ if (!list_empty(cache)) {
+ new = list_entry(cache->next, struct ordered_event, list);
+ list_del(&new->list);
+ } else if (q->buffer) {
+ new = q->buffer + q->buffer_idx;
+ if (++q->buffer_idx == MAX_SAMPLE_BUFFER)
+ q->buffer = NULL;
+ } else if (q->cur_alloc_size < q->max_alloc_size) {
+ size_t size = MAX_SAMPLE_BUFFER * sizeof(*new);
+
+ q->buffer = malloc(size);
+ if (!q->buffer)
+ return NULL;
+
+ q->cur_alloc_size += size;
+ list_add(&q->buffer->list, &q->to_free);
+ q->buffer_idx = 2;
+ new = q->buffer + 1;
+ }
+
+ return new;
+}
+
+struct ordered_event*
+ordered_events_get(struct ordered_events_queue *q, u64 timestamp)
+{
+ struct ordered_event *new;
+
+ new = alloc_event(q);
+ if (new) {
+ new->timestamp = timestamp;
+ queue_event(q, new);
+ }
+
+ return new;
+}
+
+void
+ordered_event_put(struct ordered_events_queue *q, struct ordered_event *iter)
+{
+ list_del(&iter->list);
+ list_add(&iter->list, &q->cache);
+ q->nr_events--;
+}
+
+static int __ordered_events_flush(struct perf_session *s,
+ struct perf_tool *tool)
+{
+ struct ordered_events_queue *q = &s->ordered_events;
+ struct list_head *head = &q->events;
+ struct ordered_event *tmp, *iter;
+ struct perf_sample sample;
+ u64 limit = q->next_flush;
+ u64 last_ts = q->last ? q->last->timestamp : 0ULL;
+ bool show_progress = limit == ULLONG_MAX;
+ struct ui_progress prog;
+ int ret;
+
+ if (!tool->ordered_events || !limit)
+ return 0;
+
+ if (show_progress)
+ ui_progress__init(&prog, q->nr_events, "Processing time ordered events...");
+
+ list_for_each_entry_safe(iter, tmp, head, list) {
+ if (session_done())
+ return 0;
+
+ if (iter->timestamp > limit)
+ break;
+
+ ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
+ if (ret)
+ pr_err("Can't parse sample, err = %d\n", ret);
+ else {
+ ret = perf_session_deliver_event(s, iter->event, &sample, tool,
+ iter->file_offset);
+ if (ret)
+ return ret;
+ }
+
+ ordered_event_put(q, iter);
+ q->last_flush = iter->timestamp;
+
+ if (show_progress)
+ ui_progress__update(&prog, 1);
+ }
+
+ if (list_empty(head))
+ q->last = NULL;
+ else if (last_ts <= limit)
+ q->last = list_entry(head->prev, struct ordered_event, list);
+
+ return 0;
+}
+
+int ordered_events_flush(struct perf_session *s, struct perf_tool *tool,
+ enum oeq_flush how)
+{
+ struct ordered_events_queue *q = &s->ordered_events;
+ int err;
+
+ switch (how) {
+ case OEQ_FLUSH__FINAL:
+ q->next_flush = ULLONG_MAX;
+ break;
+
+ case OEQ_FLUSH__HALF:
+ {
+ struct ordered_event *first, *last;
+ struct list_head *head = &q->events;
+
+ first = list_entry(head->next, struct ordered_event, list);
+ last = q->last;
+
+ if (WARN_ONCE(!last || list_empty(head), "empty queue"))
+ return 0;
+
+ q->next_flush = first->timestamp;
+ q->next_flush += (last->timestamp - first->timestamp) / 2;
+ break;
+ }
+
+ case OEQ_FLUSH__ROUND:
+ default:
+ break;
+ };
+
+ err = __ordered_events_flush(s, tool);
+
+ if (!err) {
+ if (how == OEQ_FLUSH__ROUND)
+ q->next_flush = q->max_timestamp;
+ }
+
+ return err;
+}
diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
new file mode 100644
index 0000000..c0dc00e
--- /dev/null
+++ b/tools/perf/util/ordered-events.h
@@ -0,0 +1,43 @@
+#ifndef __ORDERED_EVENTS_H
+#define __ORDERED_EVENTS_H
+
+#include <linux/types.h>
+#include "tool.h"
+
+struct perf_session;
+
+struct ordered_event {
+ u64 timestamp;
+ u64 file_offset;
+ union perf_event *event;
+ struct list_head list;
+};
+
+enum oeq_flush {
+ OEQ_FLUSH__FINAL,
+ OEQ_FLUSH__ROUND,
+ OEQ_FLUSH__HALF,
+};
+
+struct ordered_events_queue {
+ 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;
+ struct ordered_event *buffer;
+ struct ordered_event *last;
+ int buffer_idx;
+ unsigned int nr_events;
+};
+
+struct ordered_event *ordered_events_get(struct ordered_events_queue *q,
+ u64 timestamp);
+void ordered_event_put(struct ordered_events_queue *q,
+ struct ordered_event *iter);
+int ordered_events_flush(struct perf_session *s, struct perf_tool *tool,
+ enum oeq_flush how);
+#endif /* __ORDERED_EVENTS_H */
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 08aa245..0548d72 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -15,7 +15,6 @@
#include "cpumap.h"
#include "perf_regs.h"
#include "vdso.h"
-#include "asm/bug.h"

static int perf_session__open(struct perf_session *session)
{
@@ -449,19 +448,6 @@ static perf_event__swap_op perf_event__swap_ops[] = {
[PERF_RECORD_HEADER_MAX] = NULL,
};

-struct ordered_event {
- u64 timestamp;
- u64 file_offset;
- union perf_event *event;
- struct list_head list;
-};
-
-enum oeq_flush {
- OEQ_FLUSH__FINAL,
- OEQ_FLUSH__ROUND,
- OEQ_FLUSH__HALF,
-};
-
static void perf_session_free_sample_buffers(struct perf_session *session)
{
struct ordered_events_queue *q = &session->ordered_events;
@@ -475,195 +461,6 @@ static void perf_session_free_sample_buffers(struct perf_session *session)
}
}

-/* The queue is ordered by time */
-static void queue_event(struct ordered_events_queue *q, struct ordered_event *new)
-{
- struct ordered_event *last = q->last;
- u64 timestamp = new->timestamp;
- struct list_head *p;
-
- ++q->nr_events;
- q->last = new;
-
- if (!last) {
- list_add(&new->list, &q->events);
- q->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 clqe to
- * this.
- */
- if (last->timestamp <= timestamp) {
- while (last->timestamp <= timestamp) {
- p = last->list.next;
- if (p == &q->events) {
- list_add_tail(&new->list, &q->events);
- q->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 == &q->events) {
- list_add(&new->list, &q->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_queue *q)
-{
- struct list_head *cache = &q->cache;
- struct ordered_event *new = NULL;
-
- if (!list_empty(cache)) {
- new = list_entry(cache->next, struct ordered_event, list);
- list_del(&new->list);
- } else if (q->buffer) {
- new = q->buffer + q->buffer_idx;
- if (++q->buffer_idx == MAX_SAMPLE_BUFFER)
- q->buffer = NULL;
- } else if (q->cur_alloc_size < q->max_alloc_size) {
- size_t size = MAX_SAMPLE_BUFFER * sizeof(*new);
-
- q->buffer = malloc(size);
- if (!q->buffer)
- return NULL;
-
- q->cur_alloc_size += size;
- list_add(&q->buffer->list, &q->to_free);
- q->buffer_idx = 2;
- new = q->buffer + 1;
- }
-
- return new;
-}
-
-static struct ordered_event*
-ordered_events_get(struct ordered_events_queue *q, u64 timestamp)
-{
- struct ordered_event *new;
-
- new = alloc_event(q);
- if (new) {
- new->timestamp = timestamp;
- queue_event(q, new);
- }
-
- return new;
-}
-
-static void
-ordered_event_put(struct ordered_events_queue *q, struct ordered_event *iter)
-{
- list_del(&iter->list);
- list_add(&iter->list, &q->cache);
- q->nr_events--;
-}
-
-static int __ordered_events_flush(struct perf_session *s,
- struct perf_tool *tool)
-{
- struct ordered_events_queue *q = &s->ordered_events;
- struct list_head *head = &q->events;
- struct ordered_event *tmp, *iter;
- struct perf_sample sample;
- u64 limit = q->next_flush;
- u64 last_ts = q->last ? q->last->timestamp : 0ULL;
- bool show_progress = limit == ULLONG_MAX;
- struct ui_progress prog;
- int ret;
-
- if (!tool->ordered_events || !limit)
- return 0;
-
- if (show_progress)
- ui_progress__init(&prog, q->nr_events, "Processing time ordered events...");
-
- list_for_each_entry_safe(iter, tmp, head, list) {
- if (session_done())
- return 0;
-
- if (iter->timestamp > limit)
- break;
-
- ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
- if (ret)
- pr_err("Can't parse sample, err = %d\n", ret);
- else {
- ret = perf_session_deliver_event(s, iter->event, &sample, tool,
- iter->file_offset);
- if (ret)
- return ret;
- }
-
- ordered_event_put(q, iter);
- q->last_flush = iter->timestamp;
-
- if (show_progress)
- ui_progress__update(&prog, 1);
- }
-
- if (list_empty(head))
- q->last = NULL;
- else if (last_ts <= limit)
- q->last = list_entry(head->prev, struct ordered_event, list);
-
- return 0;
-}
-
-static int ordered_events_flush(struct perf_session *s, struct perf_tool *tool,
- enum oeq_flush how)
-{
- struct ordered_events_queue *q = &s->ordered_events;
- int err;
-
- switch (how) {
- case OEQ_FLUSH__FINAL:
- q->next_flush = ULLONG_MAX;
- break;
-
- case OEQ_FLUSH__HALF:
- {
- struct ordered_event *first, *last;
- struct list_head *head = &q->events;
-
- first = list_entry(head->next, struct ordered_event, list);
- last = q->last;
-
- if (WARN_ONCE(!last || list_empty(head), "empty queue"))
- return 0;
-
- q->next_flush = first->timestamp;
- q->next_flush += (last->timestamp - first->timestamp) / 2;
- break;
- }
-
- case OEQ_FLUSH__ROUND:
- default:
- break;
- };
-
- err = __ordered_events_flush(s, tool);
-
- if (!err) {
- if (how == OEQ_FLUSH__ROUND)
- q->next_flush = q->max_timestamp;
- }
-
- return err;
-}
-
/*
* When perf record finishes a pass on every buffers, it records this pseudo
* event.
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 58acad4..f8dcbf9 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -9,28 +9,13 @@
#include "symbol.h"
#include "thread.h"
#include "data.h"
+#include "ordered-events.h"
#include <linux/rbtree.h>
#include <linux/perf_event.h>

-struct ordered_event;
struct ip_callchain;
struct thread;

-struct ordered_events_queue {
- 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;
- struct ordered_event *buffer;
- struct ordered_event *last;
- int buffer_idx;
- unsigned int nr_events;
-};
-
struct perf_session {
struct perf_header header;
struct machines machines;
--
1.8.3.1


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