[PATCH 09/13] drm/i915: don't use gtt_pwrite on LLC cached objects

Daniel Vetter
2011-11-06T19:13:56Z

~120 µs instead fo ~210 µs to write 1mb on my snb. I like this.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/i915_gem.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0048917..8fd175c 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -842,6 +842,7 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
ret = i915_gem_phys_pwrite(dev, obj, args, file);
goto out;
} else if (obj->gtt_space &&
+ obj->cache_level == I915_CACHE_NONE &&
obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
ret = i915_gem_object_pin(obj, 0, true);
if (ret)
--
1.7.6.4