[intel] Add a driconf option to cache freed buffer objects for reuse.

This is defaulted off as it has potentially large memory costs for a modest
performance gain.  Ideally we will improve DRM performance to the point where
this optimization is not worth the memory cost in any case, or find some
middle ground in caching only limited numbers of certain buffers.  For now,
this provides a modest 4% improvement in openarena on GM965 and 10% in openarena
on GM945.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_bufmgr_ttm.h b/src/mesa/drivers/dri/intel/intel_bufmgr_ttm.h
index 0738839cef..d267a168cd 100644
--- a/src/mesa/drivers/dri/intel/intel_bufmgr_ttm.h
+++ b/src/mesa/drivers/dri/intel/intel_bufmgr_ttm.h
@@ -14,4 +14,7 @@ dri_fence *intel_ttm_fence_create_from_arg(dri_bufmgr *bufmgr, const char *name,
 dri_bufmgr *intel_bufmgr_ttm_init(int fd, unsigned int fence_type,
 				  unsigned int fence_type_flush, int batch_size);
 
+void
+intel_ttm_enable_bo_reuse(dri_bufmgr *bufmgr);
+
 #endif