[RFC PATCH 0/6] perf: Add AUX data sampling

[Alexander Shishkin]

Hi Peter,

This is an RFC, I'm not sending the tooling bits in this series,
although they can be found here [1].

This series introduces AUX data sampling for perf events, which in
case of our instruction/branch tracing PMUs like Intel PT, BTS, CS
ETM means execution flow history leading up to a perf event's
overflow.

The bulk of code is in 4/6, which adds attribute fields, creates
kernel events to generate the AUX data, takes samples and takes care
of all the tricky. 1/6 and 6/6 may also be considered separately from
this series. In particular, I suspect that 6/6 applies today to the
architectures that deliver PMIs as IRQs. Mathieu?

[1] https://git.kernel.org/cgit/linux/kernel/git/ash/linux.git/log/?h=perf-aux-sampling

Alexander Shishkin (6):
  perf: Move mlock accounting to ring buffer allocation
  perf: Add api to (de-)allocate AUX buffers for kernel counters
  perf: Add a helper for looking up pmus by type
  perf: Add infrastructure for using AUX data in perf samples
  perf: Disable PMU around address filter adjustment
  perf: Disable IRQs in address filter sync path

 include/linux/perf_event.h      |  12 ++
 include/uapi/linux/perf_event.h |  16 +-
 kernel/events/core.c            | 419 +++++++++++++++++++++++++++++++++-------
 kernel/events/internal.h        |  24 ++-
 kernel/events/ring_buffer.c     | 210 ++++++++++++++++++--
 5 files changed, 598 insertions(+), 83 deletions(-)

-- 
2.9.3