On Tue, Jun 13, 2017 at 11:54 AM, Jiri Olsa <jo...@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
