On an Ivybridge i7-3720qm with 1600MHz DDR3, with 32 fences,
Upload rate for 2 linear surfaces: 8134MiB/s -> 8154MiB/s
Upload rate for 2 tiled surfaces: 8625MiB/s -> 8632MiB/s
Upload rate for 4 linear surfaces: 8127MiB/s -> 8134MiB/s
Upload rate for 4 tiled surfaces: 8602MiB/s -> 8629MiB/s
Upload rate for 8 linear surfaces: 8124MiB/s -> 8137MiB/s
Upload rate for 8 tiled surfaces: 8603MiB/s -> 8624MiB/s
Upload rate for 16 linear surfaces: 8123MiB/s -> 8128MiB/s
Upload rate for 16 tiled surfaces: 8606MiB/s -> 8618MiB/s
Upload rate for 32 linear surfaces: 8121MiB/s -> 8128MiB/s
Upload rate for 32 tiled surfaces: 8605MiB/s -> 8614MiB/s
Upload rate for 64 linear surfaces: 8121MiB/s -> 8127MiB/s
Upload rate for 64 tiled surfaces: 3017MiB/s -> 5202MiB/s
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Testcase: igt/gem_fence_upload/performance
Testcase: igt/gem_mmap_gtt
Reviewed-by: Brad Volkin <bradley.d.volkin@xxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
---
drivers/gpu/drm/i915/i915_gem.c | 23 ++++++-----------------
1 file changed, 6 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 7ab8e0039790..90d772f72276 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1667,25 +1667,14 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
pfn = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
pfn >>= PAGE_SHIFT;
- if (!obj->fault_mappable) {
- unsigned long size = min_t(unsigned long,
- vma->vm_end - vma->vm_start,
- obj->base.size);
- int i;
+ ret = remap_io_mapping(vma,
+ vma->vm_start, pfn, vma->vm_end - vma->vm_start,
+ dev_priv->gtt.mappable);
+ if (ret)
+ goto unpin;
- for (i = 0; i < size >> PAGE_SHIFT; i++) {
- ret = vm_insert_pfn(vma,
- (unsigned long)vma->vm_start + i * PAGE_SIZE,
- pfn + i);
- if (ret)
- break;
- }
+ obj->fault_mappable = true;
- obj->fault_mappable = true;
- } else
- ret = vm_insert_pfn(vma,
- (unsigned long)vmf->virtual_address,
- pfn + page_offset);
unpin:
i915_gem_object_ggtt_unpin(obj);
unlock:
--
2.1.4
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