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drm/i915/gt: Track the overall awake/busy time
Since we wake the GT up before executing a request, and go to sleep as soon as it is retired, the GT wake time not only represents how long the device is powered up, but also provides a summary, albeit an overestimate, of the device runtime (i.e. the rc0 time to compare against rc6 time). v2: s/busy/awake/ v3: software-gt-awake-time and I915_PMU_SOFTWARE_GT_AWAKE_TIME Signed-off-by: Chris Wilson <[email protected]> Reviewed-by: Tvrtko Ursulin <[email protected]> Cc: Matthew Brost <[email protected]> Reported-by: kernel test robot <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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