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 16/17] perf tools: Limit the ordered events queue by default to 100MB
Date: Fri, 13 Jun 2014 00:08:32 +0200 [thread overview]
Message-ID: <1402610913-19059-17-git-send-email-jolsa@kernel.org> (raw)
In-Reply-To: <1402610913-19059-1-git-send-email-jolsa@kernel.org>
It's still configurable by report.queue-size config option,
but looks like 100MB limit is more sane than no limit at all.
There's some speedup for report on huge data files:
With the limit of 100 MB, I've got around 15% speedup on reporting
of ~10GB perf.data file.
current code:
621,685,704,665 cycles ( +- 0.52% )
873,397,467,969 instructions ( +- 0.00% )
286.133268732 seconds time elapsed ( +- 1.13% )
with patches:
603,933,987,185 cycles ( +- 0.45% )
869,139,445,070 instructions ( +- 0.00% )
245.337510637 seconds time elapsed ( +- 0.49% )
The speed up seems to be mainly in less cycles spent in servicing
page faults.
current code:
4.44% 0.01% perf.old [kernel.kallsyms] [k] page_fault
with patches:
1.45% 0.00% perf [kernel.kallsyms] [k] page_fault
current code (faults event):
6,643,807 faults ( +- 0.36% )
with patches (faults event):
2,214,756 faults ( +- 3.03% )
Also there's lower memory consuption.
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 | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c
index 80f1daa..c47475e 100644
--- a/tools/perf/util/ordered-events.c
+++ b/tools/perf/util/ordered-events.c
@@ -251,7 +251,8 @@ void ordered_events_queue_init(struct ordered_events_queue *q)
INIT_LIST_HEAD(&q->events);
INIT_LIST_HEAD(&q->cache);
INIT_LIST_HEAD(&q->to_free);
- q->max_alloc_size = (u64) -1;
+ /* 100MB limitation by default */
+ q->max_alloc_size = 100 * 1024 * 1024;
q->cur_alloc_size = 0;
}
--
1.8.3.1
next 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 ` Jiri Olsa [this message]
2014-06-12 22:08 ` [PATCH 17/17] perf tools: Allow out of order messages in forced flush Jiri Olsa
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