perf session: Add hooks to allow transparent decoding of AUX area tracing data
authorAdrian Hunter <adrian.hunter@intel.com>
Thu, 9 Apr 2015 15:53:48 +0000 (18:53 +0300)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 29 Apr 2015 13:37:53 +0000 (10:37 -0300)
commitc446870d80f37281a927b5f6984bd47397a7cb03
tree8f6fd133fb0f790176b6776eb41a902a8741f548
parente9bf54d25f4f64c410c2aca644749a3325b96f5a
perf session: Add hooks to allow transparent decoding of AUX area tracing data

Hook into session processing so that AUX area decoding can synthesize
events transparently to the tools.

The advantages of transparent decoding are that tools can be used
directly with perf.data files containing AUX area tracing data, which is
easier for the user and more efficient than having a separate decoding
tool.

This will work as follows:

1. Tools will feed auxtrace events to the decoder using
   perf_tool->auxtrace() (support for that still to come).

2. The decoder can process side-band events as needed due
   to the auxtrace->process_event() hook.

3. The decoder can deliver synthesized events into the
   event stream using perf_session__deliver_synth_event().

Note the expectation is that decoding will work on data that is
time-ordered with respect to the per-cpu or per-thread contexts that
were recorded.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-9-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/auxtrace.h
tools/perf/util/session.c
tools/perf/util/session.h