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Re: [PATCH 5/9] perf tools: Introduce 'P' modifier

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On Mon, Oct 05, 2015 at 12:13:48PM -0600, David Ahern wrote:
> On 10/5/15 12:06 PM, Jiri Olsa wrote:
> >The 'P' will cause the event to get maximum possible
> >detected precise level.
> >
> >Following record:
> >   $ perf record -e cycles:P ...
> >
> >will detect maximum precise level for 'cycles' event
> >and use it.
> >
> 
> Does the end result (which precise level is used) get saved to the header
> and displayed to the user properly?

yep..

[jolsa@krava perf]$ ./perf record -e cycles:P ls

...

[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.014 MB perf.data (8 samples) ]
[jolsa@krava perf]$ ./perf evlist
cycles:P
[jolsa@krava perf]$ ./perf evlist -v
cycles:P: size: 112, ...  precise_ip: 2  ...

[jolsa@krava perf]$ ./perf report --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 8  of event 'cycles:P'
# Event count (approx.): 4270406
#
# Overhead  Command  Shared Object     Symbol                    
...


jirka
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[PATCH 0/9] perf tools: Various fixes Jiri Olsa <jolsa@kernel.org> - 2015-10-05 20:10 +0200
  [PATCH 6/9] perf tests: Add parsing test for 'P' modifier Jiri Olsa <jolsa@kernel.org> - 2015-10-05 20:10 +0200
    [tip:perf/core] perf tests: Add parsing test for 'P' modifier tip-bot for Jiri Olsa <tipbot@zytor.com> - 2015-10-06 09:20 +0200
  [PATCH 1/9] tools lib api fs: Do not use PATH_MAX + 1 Jiri Olsa <jolsa@kernel.org> - 2015-10-05 20:10 +0200
    [tip:perf/core] tools lib api fs: No need to use PATH_MAX + 1 tip-bot for Jiri Olsa <tipbot@zytor.com> - 2015-10-06 09:20 +0200
  [PATCH 5/9] perf tools: Introduce 'P' modifier Jiri Olsa <jolsa@kernel.org> - 2015-10-05 20:10 +0200
    Re: [PATCH 5/9] perf tools: Introduce 'P' modifier David Ahern <dsahern@gmail.com> - 2015-10-05 20:20 +0200
      Re: [PATCH 5/9] perf tools: Introduce 'P' modifier Jiri Olsa <jolsa@redhat.com> - 2015-10-05 20:40 +0200
        Re: [PATCH 5/9] perf tools: Introduce 'P' modifier Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-10-05 21:10 +0200
    Re: [PATCH 5/9] perf tools: Introduce 'P' modifier Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-10-05 21:30 +0200
      Re: [PATCH 5/9] perf tools: Introduce 'P' modifier Jiri Olsa <jolsa@redhat.com> - 2015-10-06 09:10 +0200
    [tip:perf/core] perf tools: Introduce 'P'   modifier to request max precision tip-bot for Jiri Olsa <tipbot@zytor.com> - 2015-10-06 09:20 +0200
  [PATCH 7/9] perf tools: Add support for sorting on the iaddr Jiri Olsa <jolsa@kernel.org> - 2015-10-05 20:10 +0200
    [tip:perf/core] perf tools: Add support for sorting on the iaddr tip-bot for Don Zickus <tipbot@zytor.com> - 2015-10-06 09:20 +0200
  [PATCH 8/9] perf tools: Setup proper width for symbol_iaddr field Jiri Olsa <jolsa@kernel.org> - 2015-10-05 20:10 +0200
    [tip:perf/core] perf tools:   Setup proper width for symbol_iaddr field tip-bot for Jiri Olsa <tipbot@zytor.com> - 2015-10-06 09:20 +0200
  [PATCH 2/9] perf evlist: Display DATA_SRC sample type bit Jiri Olsa <jolsa@kernel.org> - 2015-10-05 20:10 +0200
    [tip:perf/core] perf evlist: Display DATA_SRC sample type bit tip-bot for Jiri Olsa <tipbot@zytor.com> - 2015-10-06 09:20 +0200

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