• Adrian Hunter's avatar
    perf tools: Add AUX area tracing index · 99fa2984
    Adrian Hunter authored
    Add an index of AUX area tracing events within a perf.data file.
    
    perf record uses a special user event PERF_RECORD_FINISHED_ROUND to
    enable sorting of events in chunks instead of having to sort all events
    altogether.
    
    AUX area tracing events contain data that can span back to the very
    beginning of the recording period. i.e. they do not obey the rules of
    PERF_RECORD_FINISHED_ROUND.
    
    By adding an index, AUX area tracing events can be found in advance and
    the PERF_RECORD_FINISHED_ROUND approach works as usual.
    
    The index is recorded with the auxtrace feature in the perf.data file.
    A session reads the index but does not process it.  An AUX area decoder
    can queue all the AUX area data in advance using
    auxtrace_queues__process_index() or otherwise process the index in some
    custom manner.
    Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
    Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.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/1430404667-10593-3-git-send-email-adrian.hunter@intel.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    99fa2984
builtin-record.c 28.7 KB