fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-25 00:00:11 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

i965: Always use CPU mappings for BOs on LLC platforms.

Browse source 
It looks like there's no big difference for write-only workloads, but
using a CPU map means that if they happen to read without having set the
MAP_READ_BIT, they get 100x the performance for those reads.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt 2014-02-27 10:05:39 -08:00
parent bb63df0c2d
commit 1990da2568
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/mesa/drivers/dri/i965/intel_buffer_objects.c
View file

@ -429,7 +429,7 @@ intel_bufferobj_map_range(struct gl_context * ctx,
if (access & GL_MAP_UNSYNCHRONIZED_BIT)
drm_intel_gem_bo_map_unsynchronized(intel_obj->buffer);
else if (!(access & GL_MAP_READ_BIT)) {
else if (!brw->has_llc && !(access & GL_MAP_READ_BIT)) {
drm_intel_gem_bo_map_gtt(intel_obj->buffer);
intel_bufferobj_mark_inactive(intel_obj);
} else {