Re: [RFCv2] perf: proposed perf_event_open() manpage

[Arnaldo Carvalho de Melo]

Em Tue, Nov 06, 2012 at 05:53:27PM -0500, Vince Weaver escreveu:
> .TP
> .IR "mmap"
> The
> .I mmap
> bit enables recording of extra information to a
> mmap'd ring-buffer.
> This is
> described below in subsection MMAP Layout.

Enables the recording of exec mmap events, its counterpart, for data
maps is...

> .IR "mmap_data" " (Since Linux 2.6.36)"
> Include mmap events in the ring_buffer.

That will include mmap events for data maps.
 
> .TP
> .IR "sample_id_all" " (Since Linux 2.6.38)"
> If set, then all sample ID info (TID, TIME, ID, CPU, STREAM_ID)
> will be provided.

No, it will obey sample_type for non SAMPLE PERF_RECORD_ events,
so if you want timestamps in all events so that you can detect
reordering, use it a sample_type with PERF_SAMPLE_TIME and
sample_id_all.
 
I'll read it again tomorrow, thanks for writing it!

- Arnaldo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/