[PATCH v5 0/8] i915 PMU and engine busy stats

Tvrtko Ursulin
2017-09-25T15:15:53Z

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

Fifth spin of the i915 PMU series.

Just some small cleanups across a few patches and a rebase to latest drm-tip.

Patches 1-2 are small refactors to make the following work easier.

Patch 3 is the main bit.

Patch 4 is a small optimisation on top, to only run the sampling timer when it
is required. (Depending on GPU awake status and active PMU counters.)

Patches 5-7 add software engine busyness tracking, which is then used from the
PMU in patch 7. This allows more efficient and more accurate engine busyness
metric.

And finally patch 8 is an additional optimisation which hides the whole cost
of the software engine busyness tracking behind a single nop instruction in
the off case.

Tvrtko Ursulin (8):
drm/i915: Convert intel_rc6_residency_us to ns
drm/i915: Extract intel_get_cagf
drm/i915/pmu: Expose a PMU interface for perf queries
drm/i915/pmu: Suspend sampling when GPU is idle
drm/i915: Wrap context schedule notification
drm/i915: Engine busy time tracking
drm/i915/pmu: Wire up engine busy stats to PMU
drm/i915: Gate engine stats collection with a static key

drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/i915_debugfs.c | 9 +-
drivers/gpu/drm/i915/i915_drv.c | 2 +
drivers/gpu/drm/i915/i915_drv.h | 96 +++-
drivers/gpu/drm/i915/i915_gem.c | 1 +
drivers/gpu/drm/i915/i915_gem_request.c | 1 +
drivers/gpu/drm/i915/i915_pmu.c | 855 ++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_reg.h | 3 +
drivers/gpu/drm/i915/i915_sysfs.c | 20 +-
drivers/gpu/drm/i915/intel_engine_cs.c | 136 +++++
drivers/gpu/drm/i915/intel_lrc.c | 19 +-
drivers/gpu/drm/i915/intel_pm.c | 41 +-
drivers/gpu/drm/i915/intel_ringbuffer.h | 147 ++++++
include/uapi/drm/i915_drm.h | 57 +++
14 files changed, 1353 insertions(+), 35 deletions(-)
create mode 100644 drivers/gpu/drm/i915/i915_pmu.c

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2.9.5