From: Jiri Olsa <jolsa@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: Jiri Olsa <jolsa@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Corey Ashford <cjashfor@linux.vnet.ibm.com>,
David Ahern <dsahern@gmail.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
Jean Pihet <jean.pihet@linaro.org>,
Namhyung Kim <namhyung@kernel.org>,
Paul Mackerras <paulus@samba.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 17/17] perf tools: Allow out of order messages in forced flush
Date: Fri, 13 Jun 2014 00:08:33 +0200 [thread overview]
Message-ID: <1402610913-19059-18-git-send-email-jolsa@kernel.org> (raw)
In-Reply-To: <1402610913-19059-1-git-send-email-jolsa@kernel.org>
In forced flush (OEQ_FLUSH__HALF) we break the rules of the
flush timestamp via PERF_RECORD_FINISHED_ROUND event, so
we could get out of order event.
Do not force error in this case and also changing the
output warning to use WARN_ONCE.
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/util/ordered-events.c | 4 ++++
tools/perf/util/ordered-events.h | 2 ++
tools/perf/util/session.c | 8 ++++++--
3 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
index c47475e..f92c2d0 100644
--- a/tools/perf/util/ordered-events.c
+++ b/tools/perf/util/ordered-events.c
@@ -212,12 +212,14 @@ int ordered_events_flush(struct perf_session *s, struct perf_tool *tool,
}
case OEQ_FLUSH__ROUND:
+ case OEQ_FLUSH__NONE:
default:
break;
};
if (unlikely(debug_sample_queue)) {
static const char * const str[] = {
+ "NONE",
"FINAL",
"ROUND",
"HALF ",
@@ -234,6 +236,8 @@ int ordered_events_flush(struct perf_session *s, struct perf_tool *tool,
if (!err) {
if (how == OEQ_FLUSH__ROUND)
q->next_flush = q->max_timestamp;
+
+ q->last_flush_type = how;
}
if (unlikely(debug_sample_queue)) {
diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
index 8a717de..7e92688 100644
--- a/tools/perf/util/ordered-events.h
+++ b/tools/perf/util/ordered-events.h
@@ -14,6 +14,7 @@ struct ordered_event {
};
enum oeq_flush {
+ OEQ_FLUSH__NONE,
OEQ_FLUSH__FINAL,
OEQ_FLUSH__ROUND,
OEQ_FLUSH__HALF,
@@ -32,6 +33,7 @@ struct ordered_events_queue {
struct ordered_event *last;
int buffer_idx;
unsigned int nr_events;
+ enum oeq_flush last_flush_type;
};
struct ordered_event *ordered_events_get(struct ordered_events_queue *q,
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 26bedac..a954702 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -15,6 +15,7 @@
#include "cpumap.h"
#include "perf_regs.h"
#include "vdso.h"
+#include "asm/bug.h"
static int perf_session__open(struct perf_session *session)
{
@@ -502,8 +503,11 @@ int perf_session_queue_event(struct perf_session *s, union perf_event *event,
return -ETIME;
if (timestamp < s->ordered_events.last_flush) {
- printf("Warning: Timestamp below last timeslice flush\n");
- return -EINVAL;
+ WARN_ONCE(1, "Timestamp below last timeslice flush\n");
+
+ /* We could get out of order messages after forced flush. */
+ if (q->last_flush_type != OEQ_FLUSH__HALF)
+ return -EINVAL;
}
new = ordered_events_get(q, timestamp);
--
1.8.3.1
prev parent reply other threads:[~2014-06-12 22:10 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-12 22:08 [PATCH 00/17] perf tools: Factor ordered samples queue Jiri Olsa
2014-06-12 22:08 ` [PATCH 01/17] perf tools: Always force PERF_RECORD_FINISHED_ROUND event Jiri Olsa
2014-06-13 11:51 ` Namhyung Kim
2014-06-15 17:17 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 02/17] perf tools: Fix accounting of ordered samples queue Jiri Olsa
2014-06-12 22:08 ` [PATCH 03/17] perf tools: Rename ordered_samples to ordered_events Jiri Olsa
2014-06-12 22:08 ` [PATCH 04/17] perf tools: Rename ordered_events_queue members Jiri Olsa
2014-06-12 22:08 ` [PATCH 05/17] perf tools: Add ordered_events_(get|put) interface Jiri Olsa
2014-06-13 12:05 ` Namhyung Kim
2014-06-15 17:27 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 06/17] perf tools: Factor ordered_events_flush to be more generic Jiri Olsa
2014-06-12 22:08 ` [PATCH 07/17] perf tools: Limit ordered events queue size Jiri Olsa
2014-06-12 22:08 ` [PATCH 08/17] perf tools: Flush ordered events in case of allocation failure Jiri Olsa
2014-06-12 22:08 ` [PATCH 09/17] perf tools: Make perf_session_deliver_event global Jiri Olsa
2014-06-12 22:08 ` [PATCH 10/17] perf tools: Create ordered-events object Jiri Olsa
2014-06-12 22:08 ` [PATCH 11/17] perf tools: Add ordered_events_queue_init function Jiri Olsa
2014-06-12 22:08 ` [PATCH 12/17] perf tools: Add ordered_events_queue_free function Jiri Olsa
2014-06-12 22:08 ` [PATCH 13/17] perf tools: Add perf_config_u64 function Jiri Olsa
2014-06-13 12:07 ` Namhyung Kim
2014-06-15 17:48 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 14/17] perf tools: Add report.queue-size config file option Jiri Olsa
2014-06-13 12:08 ` Namhyung Kim
2014-06-15 17:54 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 15/17] perf tools: Add debug prints for ordered events queue Jiri Olsa
2014-06-13 12:12 ` Namhyung Kim
2014-06-15 17:58 ` Jiri Olsa
2014-06-12 22:08 ` [PATCH 16/17] perf tools: Limit the ordered events queue by default to 100MB Jiri Olsa
2014-06-12 22:08 ` Jiri Olsa [this message]
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