Metal: MTLMemoryManager implementation includes functions which manage allocation of MTLBuffer resources.

The memory manager includes both a GPUContext-local manager which allocates per-context resources such as Circular Scratch Buffers for temporary data such as uniform updates and resource staging, and a GPUContext-global memory manager which features a pooled memory allocator for efficient re-use of resources, to reduce CPU-overhead of frequent memory allocations.

These Memory Managers act as a simple interface for use by other Metal backend modules and to coordinate the lifetime of buffers, to ensure that GPU-resident resources are correctly tracked and freed when no longer in use.

Note: This also contains dependent DIFF changes from D15027, though these will be removed once D15027 lands.

Authored by Apple: Michael Parkin-White

Ref T96261

Reviewed By: fclem

Maniphest Tasks: T96261

Differential Revision: https://developer.blender.org/D15277

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_render.c b/source/blender/draw/engines/eevee/eevee_render.c
index bef19c589c2..82944f237ea 100644
--- a/source/blender/draw/engines/eevee/eevee_render.c
+++ b/source/blender/draw/engines/eevee/eevee_render.c
@@ -24,6 +24,7 @@
 #include "DEG_depsgraph_query.h"
 
 #include "GPU_capabilities.h"
+#include "GPU_context.h"
 #include "GPU_framebuffer.h"
 #include "GPU_state.h"
 
@@ -646,6 +647,10 @@ void EEVEE_render_draw(EEVEE_Data *vedata, RenderEngine *engine, RenderLayer *rl
     /* XXX Seems to fix TDR issue with NVidia drivers on linux. */
     GPU_finish();
 
+    /* Perform render step between samples to allow
+     * flushing of freed GPUBackend resources. */
+    GPU_render_step();
+
     RE_engine_update_progress(engine, (float)(render_samples++) / (float)tot_sample);
   }
 }