Taking the RFC off this series.
To quite the vTune team that tried the previous version :
"It reduces data collection overhead in VTune by 11x. It is great!"
The GPA team's report on the previous version was a drop in CPU
consumption from 17~20% down to 2~3%.
This version includes :
- a fix for an issue reported by Chris on the IMR register access
on Haswell
- the ability to completely disable the i915 OA head/tail polling
- a new ioctl on the perf stream file descript (not the i915 drm
master/render node) to force i915 to look at the OA head/tail
register (see explanation in last patch).
Cheers,
Lionel Landwerlin (7):
drm/i915/perf: rework aging tail workaround
drm/i915/perf: reset pollin when perf stream is enabled
drm/i915/perf: only append status when data is available
drm/i915/perf: add new open param to configure polling of OA buffer
drm/i915: handle interrupts from the OA unit
drm/i915/perf: add interrupt enabling parameter
drm/i915/perf: add flushing ioctl
drivers/gpu/drm/i915/i915_drv.h | 59 +++-
drivers/gpu/drm/i915/i915_irq.c | 39 ++-
drivers/gpu/drm/i915/i915_perf.c | 388 +++++++++++++++---------
drivers/gpu/drm/i915/i915_reg.h | 7 +
drivers/gpu/drm/i915/intel_ringbuffer.c | 2 +
include/uapi/drm/i915_drm.h | 35 +++
6 files changed, 357 insertions(+), 173 deletions(-)
--
2.20.1
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