Searched hist:c1c82d267ae8b42de0802c31fabeb843189adb9d (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/gpu/drm/i915/ |
| H A D | i915_pmu.c | diff c1c82d267ae8b42de0802c31fabeb843189adb9d Fri Nov 08 04:35:10 CST 2019 Chris Wilson <chris@chris-wilson.co.uk> drm/i915/pmu: Cheat when reading the actual frequency to avoid fw
We want to avoid taking forcewake when querying the performance stats,
as we wish to avoid perturbing the system under observation. (And with
the forcewake being kept alive for 1ms after use, sampling the frequency
from a 200Hz timer keeps forcewake 40% active.)
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191108103511.20951-1-chris@chris-wilson.co.uk
|