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Message-ID: <20150331145739.GJ9438@kernel.org>
Date: Tue, 31 Mar 2015 11:57:39 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Jiri Olsa <jolsa@...hat.com>
Cc: David Ahern <dsahern@...il.com>,
Stephane Eranian <eranian@...gle.com>,
Jiri Olsa <jolsa@...nel.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] perf script segfault
Em Tue, Mar 31, 2015 at 11:37:44AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Mar 31, 2015 at 04:25:57PM +0200, Jiri Olsa escreveu:
> > I was just replying to the poluted ordered_events .. I haven't tracked
> :-) Yeah, that was kinda a layering violation, its good that we can
> remove it from there, as for evlist... I did a quick check and yeah, we
> can remove it from ordered_events and move the perf_evlist__parse to
> the deliver event function, where it will be obtained from perf_session
> that was obtained from container_of (oe), its just one statistic that
> remains, but yeah, probably with some work that can as well be removed.
> We could then think of this as needed while isolating those
> ordered_events code out of perf_session, to make it useable by other
> tools (my initial intent as for trace to use it), but in the end result,
> after the deliver_event was introduced, it is not needed anymore.
> Yeah, machines can as well be obtained from perf_session.
> > the segfault totaly.. we can change that after your fix of course ;-)
> :-)
So, can you take a look at this, that is your patch, rebased on top of
the fix, plus removing the pollution in ordered_events? Compile tested
only, testing now...
- Arnaldo
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index c4ffe2bd0738..09b9e8d3fcf7 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -242,7 +242,6 @@ struct events_stats {
u32 nr_invalid_chains;
u32 nr_unknown_id;
u32 nr_unprocessable_samples;
- u32 nr_unordered_events;
};
struct attr_event {
diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
index 6002fa3fcf77..52be201b9b25 100644
--- a/tools/perf/util/ordered-events.c
+++ b/tools/perf/util/ordered-events.c
@@ -2,7 +2,6 @@
#include <linux/compiler.h>
#include <linux/string.h>
#include "ordered-events.h"
-#include "evlist.h"
#include "session.h"
#include "asm/bug.h"
#include "debug.h"
@@ -167,7 +166,7 @@ int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
oe->last_flush_type);
- oe->evlist->stats.nr_unordered_events++;
+ oe->nr_unordered_events++;
}
oevent = ordered_events__new_event(oe, timestamp, event);
@@ -187,7 +186,6 @@ static int __ordered_events__flush(struct ordered_events *oe)
{
struct list_head *head = &oe->events;
struct ordered_event *tmp, *iter;
- struct perf_sample sample;
u64 limit = oe->next_flush;
u64 last_ts = oe->last ? oe->last->timestamp : 0ULL;
bool show_progress = limit == ULLONG_MAX;
@@ -206,15 +204,9 @@ static int __ordered_events__flush(struct ordered_events *oe)
if (iter->timestamp > limit)
break;
-
- ret = perf_evlist__parse_sample(oe->evlist, iter->event, &sample);
+ ret = oe->deliver(oe, iter);
if (ret)
- pr_err("Can't parse sample, err = %d\n", ret);
- else {
- ret = oe->deliver(oe, iter, &sample);
- if (ret)
- return ret;
- }
+ return ret;
ordered_events__delete(oe, iter);
oe->last_flush = iter->timestamp;
@@ -292,18 +284,13 @@ int ordered_events__flush(struct ordered_events *oe, enum oe_flush how)
return err;
}
-void ordered_events__init(struct ordered_events *oe, struct machines *machines,
- struct perf_evlist *evlist, struct perf_tool *tool,
- ordered_events__deliver_t deliver)
+void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver)
{
INIT_LIST_HEAD(&oe->events);
INIT_LIST_HEAD(&oe->cache);
INIT_LIST_HEAD(&oe->to_free);
oe->max_alloc_size = (u64) -1;
oe->cur_alloc_size = 0;
- oe->evlist = evlist;
- oe->machines = machines;
- oe->tool = tool;
oe->deliver = deliver;
}
diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
index 173e13f28c08..f403991e3bfd 100644
--- a/tools/perf/util/ordered-events.h
+++ b/tools/perf/util/ordered-events.h
@@ -3,10 +3,7 @@
#include <linux/types.h>
-struct perf_tool;
-struct perf_evlist;
struct perf_sample;
-struct machines;
struct ordered_event {
u64 timestamp;
@@ -25,8 +22,7 @@ enum oe_flush {
struct ordered_events;
typedef int (*ordered_events__deliver_t)(struct ordered_events *oe,
- struct ordered_event *event,
- struct perf_sample *sample);
+ struct ordered_event *event);
struct ordered_events {
u64 last_flush;
@@ -39,13 +35,11 @@ struct ordered_events {
struct list_head to_free;
struct ordered_event *buffer;
struct ordered_event *last;
- struct machines *machines;
- struct perf_evlist *evlist;
- struct perf_tool *tool;
ordered_events__deliver_t deliver;
int buffer_idx;
unsigned int nr_events;
enum oe_flush last_flush_type;
+ u32 nr_unordered_events;
bool copy_on_queue;
};
@@ -53,9 +47,7 @@ int ordered_events__queue(struct ordered_events *oe, union perf_event *event,
struct perf_sample *sample, u64 file_offset);
void ordered_events__delete(struct ordered_events *oe, struct ordered_event *event);
int ordered_events__flush(struct ordered_events *oe, enum oe_flush how);
-void ordered_events__init(struct ordered_events *oe, struct machines *machines,
- struct perf_evlist *evlsit, struct perf_tool *tool,
- ordered_events__deliver_t deliver);
+void ordered_events__init(struct ordered_events *oe, ordered_events__deliver_t deliver);
void ordered_events__free(struct ordered_events *oe);
static inline
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 89c66797abe4..dcdd63bd967b 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -93,11 +93,20 @@ static void perf_session__set_comm_exec(struct perf_session *session)
}
static int ordered_events__deliver_event(struct ordered_events *oe,
- struct ordered_event *event,
- struct perf_sample *sample)
+ struct ordered_event *event)
{
- return machines__deliver_event(oe->machines, oe->evlist, event->event,
- sample, oe->tool, event->file_offset);
+ struct perf_sample sample;
+ struct perf_session *session = container_of(oe, struct perf_session,
+ ordered_events);
+ int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
+
+ if (ret) {
+ pr_err("Can't parse sample, err = %d\n", ret);
+ return ret;
+ }
+
+ return machines__deliver_event(&session->machines, session->evlist, event->event,
+ &sample, session->tool, event->file_offset);
}
struct perf_session *perf_session__new(struct perf_data_file *file,
@@ -109,9 +118,9 @@ struct perf_session *perf_session__new(struct perf_data_file *file,
goto out;
session->repipe = repipe;
+ session->tool = tool;
machines__init(&session->machines);
- ordered_events__init(&session->ordered_events, &session->machines,
- session->evlist, tool, ordered_events__deliver_event);
+ ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
if (file) {
if (perf_data_file__open(file))
@@ -940,7 +949,7 @@ static s64 perf_session__process_user_event(struct perf_session *session,
u64 file_offset)
{
struct ordered_events *oe = &session->ordered_events;
- struct perf_tool *tool = oe->tool;
+ struct perf_tool *tool = session->tool;
int fd = perf_data_file__fd(session->file);
int err;
@@ -981,7 +990,7 @@ int perf_session__deliver_synth_event(struct perf_session *session,
struct perf_sample *sample)
{
struct perf_evlist *evlist = session->evlist;
- struct perf_tool *tool = session->ordered_events.tool;
+ struct perf_tool *tool = session->tool;
events_stats__inc(&evlist->stats, event->header.type);
@@ -1059,7 +1068,7 @@ static s64 perf_session__process_event(struct perf_session *session,
union perf_event *event, u64 file_offset)
{
struct perf_evlist *evlist = session->evlist;
- struct perf_tool *tool = session->ordered_events.tool;
+ struct perf_tool *tool = session->tool;
struct perf_sample sample;
int ret;
@@ -1154,9 +1163,12 @@ static void perf_tool__warn_about_errors(const struct perf_tool *tool,
"Do you have a KVM guest running and not using 'perf kvm'?\n",
stats->nr_unprocessable_samples);
}
+}
- if (stats->nr_unordered_events != 0)
- ui__warning("%u out of order events recorded.\n", stats->nr_unordered_events);
+static void ordered_events__warn_about_errors(struct ordered_events *oe)
+{
+ if (oe->nr_unordered_events != 0)
+ ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
}
volatile int session_done;
@@ -1164,7 +1176,7 @@ volatile int session_done;
static int __perf_session__process_pipe_events(struct perf_session *session)
{
struct ordered_events *oe = &session->ordered_events;
- struct perf_tool *tool = oe->tool;
+ struct perf_tool *tool = session->tool;
int fd = perf_data_file__fd(session->file);
union perf_event *event;
uint32_t size, cur_size = 0;
@@ -1248,6 +1260,7 @@ done:
out_err:
free(buf);
perf_tool__warn_about_errors(tool, &session->evlist->stats);
+ ordered_events__warn_about_errors(&session->ordered_events);
ordered_events__free(&session->ordered_events);
return err;
}
@@ -1297,7 +1310,7 @@ static int __perf_session__process_events(struct perf_session *session,
u64 file_size)
{
struct ordered_events *oe = &session->ordered_events;
- struct perf_tool *tool = oe->tool;
+ struct perf_tool *tool = session->tool;
int fd = perf_data_file__fd(session->file);
u64 head, page_offset, file_offset, file_pos, size;
int err, mmap_prot, mmap_flags, map_idx = 0;
@@ -1394,6 +1407,7 @@ out:
out_err:
ui_progress__finish();
perf_tool__warn_about_errors(tool, &session->evlist->stats);
+ ordered_events__warn_about_errors(&session->ordered_events);
ordered_events__free(&session->ordered_events);
session->one_mmap = false;
return err;
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 1310998f8318..d5fa7b7916ef 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -26,6 +26,7 @@ struct perf_session {
u64 one_mmap_offset;
struct ordered_events ordered_events;
struct perf_data_file *file;
+ struct perf_tool *tool;
};
#define PRINT_IP_OPT_IP (1<<0)
--
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