[Intel-gfx] [PATCH 00/14] i915 perf support for command stream based OA, GPU and workload metrics capture

[Sagar Arun Kamble]

This is follow up series based on reviews for
https://patchwork.freedesktop.org/series/28104/

Major change is assignment of samples at the time of request submission
onto HW instead of assigning at user submission time. Restructured
patches to make some of the earlier code-heavy patches little lighter
by modularizing them. Added base i-g-t testcase dapc for testing exposed
sample fields like PID, Timestamps, CTX ID etc.

Reiterating the intent of this series:
1. Collection of OA reports associated with the render command stream, which
are collected around batchbuffer boundaries.
2. Collect other metadata such as ctx_id, pid, tag etc. with the samples,
and thus we can establish the association of samples collected with the
corresponding process/workload.
3. Collection of GPU performance metrics associated with the command stream of
a particular engine. These metrics include timestamps of work submission and
completion on engines, mmio metrics, etc. These metrics are are collected
around batchbuffer boundaries.

Functionality to be added in future patches:
1. GPU/CPU cross-timestamp sync patches need to be reworked as requested by
   kernel maintainers.
2. Some of the data types being collected through these patches can be done in
   the userspace and that is yet to be finalized. Based on that some of the
   functionality from this series can be pruned.

Cc: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>

Sagar Arun Kamble (2):
  drm/i915: Define CTX_ID property for perf sampling
  drm/i915: Link perf stream structures with Engines

Sourab Gupta (12):
  drm/i915: Add ctx getparam ioctl parameter to retrieve ctx unique id
  drm/i915: Expose OA sample source to userspace
  drm/i915: Framework for capturing command stream based OA reports.
  drm/i915: Flush periodic samples, in case of no pending CS sample
    requests
  drm/i915: Inform userspace about command stream OA buf overflow
  drm/i915: Populate ctx ID for periodic OA reports
  drm/i915: Add support for having pid output with OA report
  drm/i915: Add support for emitting execbuffer tags through OA counter
    reports
  drm/i915: Add support for collecting timestamps on all gpu engines
  drm/i915: Extract raw GPU timestamps from OA reports to forward in
    perf samples
  drm/i915: Async check for streams data availability with hrtimer
    rescheduling
  drm/i915: Support for capturing MMIO register values

 drivers/gpu/drm/i915/i915_drv.h            |  176 ++-
 drivers/gpu/drm/i915/i915_gem.c            |    1 +
 drivers/gpu/drm/i915/i915_gem_context.c    |    3 +
 drivers/gpu/drm/i915/i915_gem_execbuffer.c |   11 +
 drivers/gpu/drm/i915/i915_gem_request.c    |    2 +
 drivers/gpu/drm/i915/i915_gem_request.h    |   10 +
 drivers/gpu/drm/i915/i915_perf.c           | 1904 ++++++++++++++++++++++++----
 drivers/gpu/drm/i915/i915_reg.h            |    6 +
 drivers/gpu/drm/i915/intel_engine_cs.c     |    4 +
 drivers/gpu/drm/i915/intel_ringbuffer.c    |    2 +
 drivers/gpu/drm/i915/intel_ringbuffer.h    |   11 +
 include/uapi/drm/i915_drm.h                |   69 +
 12 files changed, 1935 insertions(+), 264 deletions(-)

-- 
1.9.1