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

[Jiri Olsa]

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


thanks,
jirka