From: Andi Kleen <andi@firstfloor.org>
To: acme@kernel.org
Cc: jolsa@kernel.org, linux-kernel@vger.kernel.org,
eranian@google.com, namhyung@kernel.org
Subject: perf, tools: Refactor and support interval and CSV metrics v3
Date: Fri, 7 Aug 2015 17:51:52 -0700 [thread overview]
Message-ID: <1438995119-10531-1-git-send-email-andi@firstfloor.org> (raw)
[v2: Addressed (near) all review feedback. No manpage updates so far.
Add support for --per-core metrics. Various cleanups.]
[v3: Everything compiles again. Some more cleanups. Updated to latest tip tree.]
Currently perf stat does not support printing computed metrics for interval (-I xxx)
or CSV (-x,) mode. For example IPC or TSX metrics over time are quite useful to know.
This patch implements them. The main obstacle was that the
metrics printing was all open coded all over the metrics computation code.
The second patch refactors the metrics printing to work through call backs that
can be more easily changed. This also cleans up the metrics printing significantly.
The indentation is now handled through printf, no more need to manually count spaces.
Then based on that it implements metrics printing for CSV and interval mode.
Example output:
% perf stat -I1000 -a sleep 1
# time counts unit events metric multiplex
1.001301370 12020.049593 task-clock (msec) (100.00%)
1.001301370 3,952 context-switches # 0.329 K/sec (100.00%)
1.001301370 69 cpu-migrations # 0.006 K/sec (100.00%)
1.001301370 76 page-faults # 0.006 K/sec
1.001301370 386,582,789 cycles # 0.032 GHz (100.00%)
1.001301370 716,441,544 stalled-cycles-frontend # 185.33% frontend cycles idle (100.00%)
1.001301370 <not supported> stalled-cycles-backend
1.001301370 101,751,678 instructions # 0.26 insn per cycle
1.001301370 # 7.04 stalled cycles per insn (100.00%)
1.001301370 20,914,692 branches # 1.740 M/sec (100.00%)
1.001301370 1,943,630 branch-misses # 9.29% of all branches
CSV mode
% perf stat -x, -I1000 -a sleep 1
1.000852081,12016.143006,,task-clock
1.000852081,4457,,context-switches,12015168277,100.00,0.371,K/sec
1.000852081,50,,cpu-migrations,12014024424,100.00,0.004,K/sec
1.000852081,76,,page-faults,12013076716,100.00,0.006,K/sec
1.000852081,515854373,,cycles,12011235336,100.00,0.043,GHz
1.000852081,1030742150,,stalled-cycles-frontend,12010984057,100.00,199.81,frontend cycles idle
1.000852081,<not supported>,,stalled-cycles-backend,0,100.00
1.000852081,116782495,,instructions,12011130729,100.00,0.23,insn per cycle
1.000852081,,,,12011130729,100.00,8.83,stalled cycles per insn
1.000852081,23748237,,branches,12010745125,100.00,1.976,M/sec
1.000852081,1976560,,branch-misses,12010501884,100.00,8.32,of all branches
Available in
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc-2.6 perf/stat-metrics-3
next reply other threads:[~2015-08-08 0:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-08 0:51 Andi Kleen [this message]
2015-08-08 0:51 ` [PATCH 1/7] perf, tools, stat: Move sw clock metrics printout to stat-shadow Andi Kleen
2015-08-08 17:40 ` Jiri Olsa
2015-08-08 0:51 ` [PATCH 2/7] perf, tools, stat: Abstract stat metrics printing Andi Kleen
2015-08-08 17:40 ` Jiri Olsa
2015-08-08 0:51 ` [PATCH 3/7] perf, tools, stat: Add support for metrics in interval mode Andi Kleen
2015-08-08 0:51 ` [PATCH 4/7] perf, tools, stat: Move noise/running printing into printout Andi Kleen
2015-08-08 0:51 ` [PATCH 5/7] perf, tools, stat: Implement CSV metrics output Andi Kleen
2015-08-08 0:51 ` [PATCH 6/7] perf, tools, stat: Move non counting counter printing to printout Andi Kleen
2015-08-08 0:51 ` [PATCH 7/7] perf, tools: Support metrics in --per-core/socket mode Andi Kleen
2015-09-02 23:35 perf, tools: Refactor and support interval and CSV metrics v3 Andi Kleen
2015-09-03 13:17 ` Jiri Olsa
2015-09-03 13:36 ` Andi Kleen
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