linux/tools/perf/Documentation
Stephane Eranian 13370a9b5b perf stat: Add interval printing
This patch adds a new printing mode for perf stat.  It allows interval
printing. That means perf stat can now print event deltas at regular
time interval.  This is useful to detect phases in programs.

The -I option enables interval printing. It expects an interval duration
in milliseconds. Minimum is 100ms. Once, activated perf stat prints
events deltas since last printout. All modes are supported.

$ perf stat -I 1000 -e cycles noploop 10
noploop for 10 seconds
 #           time             counts events
      1.000109853      2,388,560,546 cycles
      2.000262846      2,393,332,358 cycles
      3.000354131      2,393,176,537 cycles
      4.000439503      2,393,203,790 cycles
      5.000527075      2,393,167,675 cycles
      6.000609052      2,393,203,670 cycles
      7.000691082      2,393,175,678 cycles

The output format makes it easy to feed into a plotting program such as
gnuplot when the -I option is used in combination with the -x option:

$ perf stat -x, -I 1000 -e cycles noploop 10
noploop for 10 seconds
1.000084113,2378775498,cycles
2.000245798,2391056897,cycles
3.000354445,2392089414,cycles
4.000459115,2390936603,cycles
5.000565341,2392108173,cycles

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1359460064-3060-3-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2013-01-30 10:36:53 -03:00
..
android.txt perf tools: Add info about cross compiling for Android ARM 2012-10-31 12:17:49 -02:00
asciidoc.conf
examples.txt mm-tracepoint: fix documentation and examples 2012-01-10 16:30:41 -08:00
jit-interface.txt perf symbols: Add description of JIT interface 2012-08-13 14:55:02 -03:00
Makefile perf tools: Don't check configuration on make tags 2012-12-09 08:46:07 -03:00
manpage-1.72.xsl
manpage-base.xsl
manpage-bold-literal.xsl
manpage-normal.xsl
manpage-suppress-sp.xsl
perf-annotate.txt perf tools: Allow user to indicate path to objdump in command line 2012-09-05 19:41:55 -03:00
perf-archive.txt perf archive: Add documentation 2010-01-20 08:54:58 +01:00
perf-bench.txt perf bench: Fix confused variable namings and descriptions in mem subsystem 2012-07-02 14:35:45 -03:00
perf-buildid-cache.txt perf buildid-cache: Add option to show build ids that are missing in the cache 2012-12-09 08:46:08 -03:00
perf-buildid-list.txt perf report: Accept fifos as input file 2011-12-23 17:01:03 -02:00
perf-diff.txt perf diff: Remove displacement output option 2012-12-09 08:46:07 -03:00
perf-evlist.txt perf evlist: Show event attribute details 2012-05-22 14:30:11 -03:00
perf-help.txt
perf-inject.txt perf inject: Merge sched_stat_* and sched_switch events 2012-10-26 11:22:25 -02:00
perf-kmem.txt perf report: Accept fifos as input file 2011-12-23 17:01:03 -02:00
perf-kvm.txt perf kvm: Events analysis tool 2012-09-21 12:51:22 -03:00
perf-list.txt perf list: Document precise event sampling for AMD IBS 2012-08-08 12:42:21 -03:00
perf-lock.txt perf lock: Document lock info subcommand 2012-01-30 18:30:48 -02:00
perf-probe.txt perf probe: Detect probe target when m/x options are absent 2012-05-11 13:58:53 -03:00
perf-record.txt treewide: Fix typos in various drivers 2012-12-03 11:05:04 +01:00
perf-report.txt perf report: Update documentation for sort keys 2013-01-24 16:40:28 -03:00
perf-sched.txt perf report: Accept fifos as input file 2011-12-23 17:01:03 -02:00
perf-script-perl.txt perf script perl/python: Fix libexec scripts path in Documentation 2012-08-20 09:30:36 -03:00
perf-script-python.txt perf script: Remove workqueue-stats script 2013-01-24 16:40:53 -03:00
perf-script.txt perf script: Add option resolving vmlinux path 2012-01-30 18:13:07 -02:00
perf-stat.txt perf stat: Add interval printing 2013-01-30 10:36:53 -03:00
perf-test.txt perf test: Allow skipping tests 2013-01-24 16:40:53 -03:00
perf-timechart.txt perf report: Accept fifos as input file 2011-12-23 17:01:03 -02:00
perf-top.txt perf top: Use perf_evlist__config() 2012-12-11 17:22:39 -03:00
perf-trace.txt perf trace: Use sched:sched_stat_runtime to provide a thread summary 2012-10-25 10:57:43 -02:00
perf.txt perf: Fix few typos + cosmetics 2010-01-13 17:39:44 +01:00
perfconfig.example perf annotate browser: Read perf config file for settings 2012-05-29 22:06:30 -03:00