linux-kernel - [RFC PATCH v5 0/3] Make eBPF programs output data to perf

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Message-ID: <1436839171-31527-1-git-send-email-hekuang@huawei.com>
Date:	Tue, 14 Jul 2015 01:59:28 +0000
From:	He Kuang <hekuang@...wei.com>
To:	<rostedt@...dmis.org>, <ast@...mgrid.com>,
	<masami.hiramatsu.pt@...achi.com>, <acme@...nel.org>,
	<a.p.zijlstra@...llo.nl>, <mingo@...hat.com>,
	<namhyung@...nel.org>, <jolsa@...nel.org>
CC:	<wangnan0@...wei.com>, <pi3orama@....com>,
	<linux-kernel@...r.kernel.org>, <hekuang@...wei.com>
Subject: [RFC PATCH v5 0/3] Make eBPF programs output data to perf

Hi,

Previous patch v4 url:
http://thread.gmane.org/gmane.linux.kernel/1993353

This version we output bpf trace events in a hex array, the results
for three u64 integers in previous sample changed to this:

  dd 1042 [000] 1296.122951: bpf:bpf_output_data: 7a ca aa c6 2d 01 00
  00 95 87 ec ca 2d 01 00 00 1b bd 41 04 00 00 00 00

Users can interpret their own formats and get the result:

  last=0x12dc6aaca7a, cur=0x12dcaec8795, del=0x441bd1b

v3-v4:
 - Change u64 array in trace event to u8.
 - Remove misleading 'perf event' in subject.

Thank you.

He Kuang (3):
  tracing/events: Fix wrong sample output by storing array length
    instead of size
  tools lib traceevent: Add function to get dynamic arrays length
  bpf: Introduce function for outputing trace event data

 include/trace/events/bpf.h                         | 30 +++++++++++++
 include/trace/trace_events.h                       |  5 ++-
 include/uapi/linux/bpf.h                           |  7 +++
 kernel/trace/bpf_trace.c                           | 23 ++++++++++
 samples/bpf/bpf_helpers.h                          |  2 +
 tools/lib/traceevent/event-parse.c                 | 52 ++++++++++++++++++++++
 tools/lib/traceevent/event-parse.h                 |  1 +
 .../util/scripting-engines/trace-event-python.c    |  1 +
 8 files changed, 119 insertions(+), 2 deletions(-)
 create mode 100644 include/trace/events/bpf.h

-- 
1.8.5.2

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