Enable low level request tracing events

configname: CONFIG_DRM_I915_LOW_LEVEL_TRACEPOINTS

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>drm/i915 Debugging
└─>Enable low level request tracing events
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Choose this option to turn on low level request tracing events.
This provides the ability to precisely monitor engine utilisation
and also analyze the request dependency resolving timeline.

Recommended for driver developers only.

If in doubt, say "N".

depends
CONFIG_DRM_I915
CONFIG_EXPERT
CONFIG_HAS_IOMEM