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, 9 insertions, 6 deletions

diff --git a/source/blender/editors/sculpt_paint/sculpt_face_set.c b/source/blender/editors/sculpt_paint/sculpt_face_set.c
index c8769523823..e58ffb2c9e6 100644
--- a/source/blender/editors/sculpt_paint/sculpt_face_set.c
+++ b/source/blender/editors/sculpt_paint/sculpt_face_set.c
@@ -87,6 +87,7 @@ static void do_draw_face_sets_brush_task_cb_ex(void *__restrict userdata,
   SculptBrushTest test;
   SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape(
       ss, &test, data->brush->falloff_shape);
+  const int thread_id = BLI_task_parallel_thread_id(tls);
 
   BKE_pbvh_vertex_iter_begin(ss->pbvh, data->nodes[n], vd, PBVH_ITER_UNIQUE)
   {
@@ -107,7 +108,7 @@ static void do_draw_face_sets_brush_task_cb_ex(void *__restrict userdata,
                                                                       vd.fno,
                                                                       vd.mask ? *vd.mask : 0.0f,
                                                                       vd.index,
-                                                                      tls->thread_id);
+                                                                      thread_id);
 
           if (fade > 0.05f && ss->face_sets[vert_map->indices[j]] > 0) {
             ss->face_sets[vert_map->indices[j]] = abs(ss->cache->paint_face_set);
@@ -127,7 +128,7 @@ static void do_draw_face_sets_brush_task_cb_ex(void *__restrict userdata,
                                                                       vd.fno,
                                                                       vd.mask ? *vd.mask : 0.0f,
                                                                       vd.index,
-                                                                      tls->thread_id);
+                                                                      thread_id);
 
           if (fade > 0.05f) {
             SCULPT_vertex_face_set_set(ss, vd.index, ss->cache->paint_face_set);
@@ -160,6 +161,8 @@ static void do_relax_face_sets_brush_task_cb_ex(void *__restrict userdata,
     bstrength *= 2.0f;
   }
 
+  const int thread_id = BLI_task_parallel_thread_id(tls);
+
   BKE_pbvh_vertex_iter_begin(ss->pbvh, data->nodes[n], vd, PBVH_ITER_UNIQUE)
   {
     if (sculpt_brush_test_sq_fn(&test, vd.co)) {
@@ -172,7 +175,7 @@ static void do_relax_face_sets_brush_task_cb_ex(void *__restrict userdata,
                                                                     vd.fno,
                                                                     vd.mask ? *vd.mask : 0.0f,
                                                                     vd.index,
-                                                                    tls->thread_id);
+                                                                    thread_id);
 
         SCULPT_relax_vertex(ss, &vd, fade * bstrength, relax_face_sets, vd.co);
         if (vd.mvert) {
@@ -211,15 +214,15 @@ void SCULPT_do_draw_face_sets_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, in
       .nodes = nodes,
   };
 
-  PBVHParallelSettings settings;
+  TaskParallelSettings settings;
   BKE_pbvh_parallel_range_settings(&settings, (sd->flags & SCULPT_USE_OPENMP), totnode);
   if (ss->cache->alt_smooth) {
     for (int i = 0; i < 4; i++) {
-      BKE_pbvh_parallel_range(0, totnode, &data, do_relax_face_sets_brush_task_cb_ex, &settings);
+      BLI_task_parallel_range(0, totnode, &data, do_relax_face_sets_brush_task_cb_ex, &settings);
     }
   }
   else {
-    BKE_pbvh_parallel_range(0, totnode, &data, do_draw_face_sets_brush_task_cb_ex, &settings);
+    BLI_task_parallel_range(0, totnode, &data, do_draw_face_sets_brush_task_cb_ex, &settings);
   }
 }