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Groups > linux.kernel > #1605244
| From | Arnaldo Carvalho de Melo <acme@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 09/11] perf stat: Correct --no-aggr description |
| Date | 2017-03-21 02:30 +0100 |
| Message-ID | <tngMx-4Et-13@gated-at.bofh.it> (permalink) |
| References | <tngCR-4AF-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Description of --no-aggr in perf-stat man page is outdated. --no-aggr
can also be used while profiling specific set of cpus. For ex,
$ perf stat -e cycles,instructions -C 1-2 --no-aggr -- sleep 1
Performance counter stats for 'CPU(s) 1-2':
CPU1 5,94,92,795 cycles
CPU2 2,69,72,403 cycles
CPU1 2,02,08,327 instructions # 0.34 insn per cycle
CPU2 73,17,123 instructions # 0.12 insn per cycle
1.000989132 seconds time elapsed
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1490013438-5713-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-stat.txt | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index aecf2a87e7d6..978548138624 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -94,8 +94,7 @@ to activate system-wide monitoring. Default is to count on all CPUs.
-A::
--no-aggr::
-Do not aggregate counts across all monitored CPUs in system-wide mode (-a).
-This option is only valid in system-wide mode.
+Do not aggregate counts across all monitored CPUs.
-n::
--null::
--
2.9.3
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[GIT PULL 00/11] perf/core improvements and fixes Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-03-21 02:20 +0100
[PATCH 01/11] perf lock: Subcommands should include common options Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-03-21 02:20 +0100
[PATCH 10/11] perf probe: Fix concat_probe_trace_events Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-03-21 02:30 +0100
[PATCH 05/11] tools include: Sync {,tools/}include/uapi/linux/perf_event.h Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-03-21 02:30 +0100
[PATCH 09/11] perf stat: Correct --no-aggr description Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-03-21 02:30 +0100
Re: [GIT PULL 00/11] perf/core improvements and fixes Ingo Molnar <mingo@kernel.org> - 2017-03-21 07:50 +0100
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