[Bug 90112] [BSW bisected] OglGSCloth/Lightsmark/CS/ Portal/ Half Life 2 games performance decreased by 15%-45%

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90112

--- Comment #39 from Chris Wilson <chris at chris-wilson.co.uk> ---
byt OglGSCloth

Note that chv doesn't use the full RPS autotuning. You can try

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5eed3caba483..ef733d164cec 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4120,7 +4120,7 @@ static bool valleyview_set_rps(struct drm_i915_private
*dev_priv, u8 val)
                if (vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val))
                        return false;

-               if (!IS_CHERRYVIEW(dev_priv))
+               if (1)
                        gen6_set_rps_thresholds(dev_priv, val);

                dev_priv->rps.cur_freq = val;

and see if that makes any difference

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