Task: Use TBB as Task Scheduler

This patch enables TBB as the default task scheduler. TBB stands for Threading Building Blocks and is developed by Intel. The library contains several threading patters. This patch maps blenders BLI_task_* function to their counterpart. After this patch we can add more patterns. A promising one is TBB:graph that can be used for depsgraph, draw manager and compositor.

Performance changes depends on the actual hardware. It was tested on different hardwares from laptops to workstations and we didn't detected any downgrade of the performance.
* Linux Xeon E5-2699 v4 got FPS boost from 12 to 17 using Spring's 04_010_A.anim.blend.
* AMD Ryzen Threadripper 2990WX 32-Core Animation playback goes from 9.5-10.5 FPS to 13.0-14.0 FPS on Agent 327 , 10_03_B.anim.blend.

Reviewed By: brecht, sergey

Differential Revision: https://developer.blender.org/D7475

1 files changed, 2 insertions, 21 deletions

diff --git a/source/blender/blenkernel/BKE_pbvh.h b/source/blender/blenkernel/BKE_pbvh.h
index 94f0e544a6b..6b0861769c3 100644
--- a/source/blender/blenkernel/BKE_pbvh.h
+++ b/source/blender/blenkernel/BKE_pbvh.h
@@ -49,6 +49,7 @@ struct PBVH;
 struct PBVHNode;
 struct SubdivCCG;
 struct TaskParallelTLS;
+struct TaskParallelSettings;
 
 typedef struct PBVH PBVH;
 typedef struct PBVHNode PBVHNode;
@@ -456,30 +457,10 @@ bool pbvh_has_face_sets(PBVH *bvh);
 void pbvh_show_face_sets_set(PBVH *bvh, bool show_face_sets);
 
 /* Parallelization */
-typedef void (*PBVHParallelRangeFunc)(void *__restrict userdata,
-                                      const int iter,
-                                      const struct TaskParallelTLS *__restrict tls);
-typedef void (*PBVHParallelReduceFunc)(const void *__restrict userdata,
-                                       void *__restrict chunk_join,
-                                       void *__restrict chunk);
-
-typedef struct PBVHParallelSettings {
-  bool use_threading;
-  void *userdata_chunk;
-  size_t userdata_chunk_size;
-  PBVHParallelReduceFunc func_reduce;
-} PBVHParallelSettings;
-
-void BKE_pbvh_parallel_range_settings(struct PBVHParallelSettings *settings,
+void BKE_pbvh_parallel_range_settings(struct TaskParallelSettings *settings,
                                       bool use_threading,
                                       int totnode);
 
-void BKE_pbvh_parallel_range(const int start,
-                             const int stop,
-                             void *userdata,
-                             PBVHParallelRangeFunc func,
-                             const struct PBVHParallelSettings *settings);
-
 struct MVert *BKE_pbvh_get_verts(const PBVH *bvh);
 
 #ifdef __cplusplus