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Re: [PATCH v4 00/16] perf tool: add meta-data header support for pipe-mode

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On Tue, Jun 13, 2017 at 11:54 AM, Jiri Olsa <jolsa@redhat.com> wrote:
> On Mon, Jun 12, 2017 at 09:29:16PM -0700, David Carrillo-Cisneros wrote:
>> v4: - Limit write_* functions to page_size.
>>     - Fixed bugs spotted by Jiri.
>>     - Add information about pipe-mode to some error messages.
>
> hum, looks like we have pipe report broken.. on arnaldo's perf/core branch:
>
> [jolsa@krava perf]$ ./perf record ls | ./perf report
> # To display the perf.data header info, please use --header/--header-only options.
> #
>
> ...
>
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.000 MB (null) ]
> #
> # Total Lost Samples: 0
> #
> # Samples: 10  of event 'cycles:uhH'
> # Event count (approx.): 1810081
> #
> # Overhead  Trace output
> # ........  ............
> #
>    100.00%  N/A

I saw this bug before, that time I bisected it to commit d49dadea7862
("perf tools: Make 'trace' or 'trace_fields' sort key default for
tracepoint events") from Dec 2015 but didn't have time to look further
into it ...

David

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[PATCH v4 00/16] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 16/16] perf header: add event desc to pipe-mode header David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 03/16] perf header: fail on write_padded error David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 13/16] perf header: change FEAT_OP* macros David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 02/16] perf header: add PROCESS_STR_FUN macro David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 10/16] perf header: use struct feat_fd in read header records David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 07/16] perf header: use struct feat_fd for print David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 01/16] perf header: encapsulate read and swap David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 04/16] perf util: add const modifier to buf in "writen" function David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 11/16] perf header: make write_pmu_mappings pipe-mode friendly David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 09/16] perf header: don't pass struct perf_file_section to process_##_feat David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
    Re: [PATCH v4 09/16] perf header: don't pass struct  perf_file_section to process_##_feat Jiri Olsa <jolsa@redhat.com> - 2017-06-13 21:00 +0200
      Re: [PATCH v4 09/16] perf header: don't pass struct perf_file_section  to process_##_feat David Carrillo-Cisneros <davidcc@google.com> - 2017-06-14 04:00 +0200
  [PATCH v4 12/16] perf header: add a buffer to struct feat_fd David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
    Re: [PATCH v4 12/16] perf header: add a buffer to struct feat_fd Jiri Olsa <jolsa@redhat.com> - 2017-06-13 21:00 +0200
      Re: [PATCH v4 12/16] perf header: add a buffer to struct feat_fd David Carrillo-Cisneros <davidcc@google.com> - 2017-06-14 04:00 +0200
  [PATCH v4 14/16] perf tool: add show_feature_header to perf_tool David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
    Re: [PATCH v4 14/16] perf tool: add show_feature_header to perf_tool Jiri Olsa <jolsa@redhat.com> - 2017-06-13 21:00 +0200
  [PATCH v4 06/16] perf header: add struct feat_fd for write David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  [PATCH v4 08/16] perf header: use struct feat_fd to process header records David Carrillo-Cisneros <davidcc@google.com> - 2017-06-13 06:40 +0200
  Re: [PATCH v4 00/16] perf tool: add meta-data header support for  pipe-mode Jiri Olsa <jolsa@redhat.com> - 2017-06-13 21:00 +0200
    Re: [PATCH v4 00/16] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros <davidcc@google.com> - 2017-06-14 08:50 +0200
  Re: [PATCH v4 00/16] perf tool: add meta-data header support for  pipe-mode Jiri Olsa <jolsa@redhat.com> - 2017-06-13 21:00 +0200
    Re: [PATCH v4 00/16] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros <davidcc@google.com> - 2017-06-14 09:00 +0200
      Re: [PATCH v4 00/16] perf tool: add meta-data header support for  pipe-mode Jiri Olsa <jolsa@redhat.com> - 2017-06-14 09:30 +0200
        Re: [PATCH v4 00/16] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros <davidcc@google.com> - 2017-06-14 20:40 +0200

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