Messages in this thread | | | From | David Carrillo-Cisneros <> | Date | Tue, 13 Jun 2017 23:44:20 -0700 | Subject | 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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