Mesa (master): panfrost: Always align strides to cache line (64)

[GitLab Mirror]

Module: Mesa
Branch: master
Commit: a38583e352e4718aaf6f8947bf385407128b137e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a38583e352e4718aaf6f8947bf385407128b137e

Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date:   Fri Jun  7 08:58:16 2019 -0700

panfrost: Always align strides to cache line (64)

(Performance tweak.)

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>

---

 src/gallium/drivers/panfrost/pan_resource.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/panfrost/pan_resource.c b/src/gallium/drivers/panfrost/pan_resource.c
index 23a05ee43cc..9e8f305c849 100644
--- a/src/gallium/drivers/panfrost/pan_resource.c
+++ b/src/gallium/drivers/panfrost/pan_resource.c
@@ -210,7 +210,13 @@ panfrost_setup_slices(const struct pipe_resource *tmpl, struct panfrost_bo *bo)
                 }
 
                 slice->offset = offset;
-                slice->stride = bytes_per_pixel * effective_width;
+
+                /* Compute the would-be stride */
+                unsigned stride = bytes_per_pixel * effective_width;
+
+                /* ..but cache-line align it for performance */
+                stride = ALIGN(stride, 64);
+                slice->stride = stride;
 
                 offset += slice->stride * effective_height;