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9dc9a95f03
linux_dsm_epyc7002/tools/perf/Documentation
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Alexey Budankov 9dc9a95f03 perf stat: Enable 1ms interval for printing event counters values 
Currently print count interval for performance counters values is
limited by 10ms so reading the values at frequencies higher than 100Hz
is restricted by the tool.

This change makes perf stat -I possible on frequencies up to 1KHz and,
to some extent, makes perf stat -I to be on-par with perf record
sampling profiling.

When running perf stat -I for monitoring e.g. PCIe uncore counters and
at the same time profiling some I/O workload by perf record e.g. for
cpu-cycles and context switches, it is then possible to observe
consolidated CPU/OS/IO(Uncore) performance picture for that workload.

Tool overhead warning printed when specifying -v option can be missed
due to screen scrolling in case you have output to the console
so message is moved into help available by running perf stat -h.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/b842ad6a-d606-32e4-afe5-974071b5198e@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-04-12 09:29:31 -03:00
..
android.txt perf tools: Update android build documentation 2016-07-04 20:27:27 -03:00
asciidoc.conf perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
Build.txt perf build: Add build documentation 2015-02-12 17:53:00 -03:00
callchain-overhead-calculation.txt perf tools: Document --children option in more detail 2015-04-29 10:38:06 -03:00
examples.txt perf record: Remove -f/--force option 2013-07-08 17:37:25 -03:00
intel-bts.txt perf tools: Add Intel BTS support 2015-08-21 11:34:10 -03:00
intel-pt.txt perf intel-pt: Fix syntax in documentation of config option 2017-09-01 14:45:59 -03:00
itrace.txt perf auxtrace: Add itrace option to output power events 2017-06-27 12:09:58 -03:00
jit-interface.txt perf symbols: Add description of JIT interface 2012-08-13 14:55:02 -03:00
jitdump-specification.txt perf jit: Add jitdump format specification document 2016-10-24 11:07:41 -03:00
Makefile perf tools: Really install manpages via 'make install-man' 2017-08-22 13:24:53 -03:00
manpage-1.72.xsl perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
manpage-base.xsl perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
manpage-bold-literal.xsl perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
manpage-normal.xsl perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
manpage-suppress-sp.xsl perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
perf-annotate.txt perf annotate: Introduce --ignore-vmlinux command line option 2018-03-21 12:53:42 -03:00
perf-archive.txt perf archive: Remove duplicated 'runs' in man page 2013-12-09 15:21:45 -03:00
perf-bench.txt perf bench mem: Rename 'routine' to 'function' 2015-10-19 16:10:25 -03:00
perf-buildid-cache.txt perf buildid-cache: Document missing --force option 2017-11-16 14:50:07 -03:00
perf-buildid-list.txt perf report: Accept fifos as input file 2011-12-23 17:01:03 -02:00
perf-c2c.txt perf c2c record: Record physical addresses in samples 2018-03-16 13:52:57 -03:00
perf-config.txt perf diff: Add diff.compute config option 2017-02-13 14:29:37 -03:00
perf-data.txt perf tools: Correct title markers for asciidoctor 2018-03-07 10:26:32 -03:00
perf-diff.txt perf diff: Add -q/--quiet option 2017-02-20 11:47:08 -03:00
perf-evlist.txt perf evlist: Document missing --force option 2017-11-16 14:50:07 -03:00
perf-ftrace.txt perf tools: Correct title markers for asciidoctor 2018-03-07 10:26:32 -03:00
perf-help.txt perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
perf-inject.txt perf inject: Document missing options 2017-11-16 14:50:05 -03:00
perf-kallsyms.txt perf tools: Correct title markers for asciidoctor 2018-03-07 10:26:32 -03:00
perf-kmem.txt perf kmem: Document a missing option & an argument 2018-02-16 14:55:42 -03:00
perf-kvm.txt perf tools: Configurable per thread proc map processing time out 2015-06-19 18:27:13 -03:00
perf-list.txt perf pmu: Support wildcards on pmu name in dynamic pmu events 2018-03-08 10:05:25 -03:00
perf-lock.txt perf lock: Document missing options 2017-11-16 14:50:04 -03:00
perf-mem.txt perf mem: Document a missing option 2018-02-16 14:55:42 -03:00
perf-probe.txt perf probe: Support escaped character in parser 2017-12-27 12:15:55 -03:00
perf-record.txt perf record: Throttle user defined frequencies to the maximum allowed 2018-03-05 09:58:44 -03:00
perf-report.txt perf tools: Add a "dso_size" sort order 2018-04-02 07:57:37 -03:00
perf-sched.txt perf tools: Correct title markers for asciidoctor 2018-03-07 10:26:32 -03:00
perf-script-perl.txt perf tools: Correct title markers for asciidoctor 2018-03-07 10:26:32 -03:00
perf-script-python.txt perf script python: Remove dups in documentation examples 2017-06-07 20:36:12 -03:00
perf-script.txt perf script: Add --show-round-event to display PERF_RECORD_FINISHED_ROUND 2018-02-16 10:09:23 -03:00
perf-stat.txt perf stat: Enable 1ms interval for printing event counters values 2018-04-12 09:29:31 -03:00
perf-test.txt perf test: Add -F/--dont-fork option 2016-06-30 18:27:45 -03:00
perf-timechart.txt perf timechart: Document missing --force option 2017-11-16 14:50:06 -03:00
perf-top.txt perf top: Document --ignore-vmlinux 2018-03-19 13:51:52 -03:00
perf-trace.txt perf trace: Show only failing syscalls 2018-04-02 07:57:37 -03:00
perf-version.txt perf version: Add man page 2018-04-02 13:52:23 -03:00
perf.data-file-format.txt perf tools: Update quipper information 2018-03-08 11:30:54 -03:00
perf.txt perf tools: Handle -h and -v options 2015-10-05 16:36:18 -03:00
perfconfig.example perf config: Show default report configuration in example and docs 2016-09-01 09:44:13 -03:00
tips.txt perf c2c: Add a tip about cacheline events 2017-12-05 15:43:55 -03:00