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, 7 deletions

diff --git a/source/blender/blenkernel/intern/particle.c b/source/blender/blenkernel/intern/particle.c
index 0e35fa5d19f..48e0a493ee0 100644
--- a/source/blender/blenkernel/intern/particle.c
+++ b/source/blender/blenkernel/intern/particle.c
@@ -2787,9 +2787,7 @@ static void psys_thread_create_path(ParticleTask *task,
   }
 }
 
-static void exec_child_path_cache(TaskPool *__restrict UNUSED(pool),
-                                  void *taskdata,
-                                  int UNUSED(threadid))
+static void exec_child_path_cache(TaskPool *__restrict UNUSED(pool), void *taskdata)
 {
   ParticleTask *task = taskdata;
   ParticleThreadContext *ctx = task->ctx;
@@ -2810,7 +2808,6 @@ void psys_cache_child_paths(ParticleSimulationData *sim,
                             const bool editupdate,
                             const bool use_render_params)
 {
-  TaskScheduler *task_scheduler;
   TaskPool *task_pool;
   ParticleThreadContext ctx;
   ParticleTask *tasks_parent, *tasks_child;
@@ -2826,8 +2823,7 @@ void psys_cache_child_paths(ParticleSimulationData *sim,
     return;
   }
 
-  task_scheduler = BLI_task_scheduler_get();
-  task_pool = BLI_task_pool_create(task_scheduler, &ctx, TASK_PRIORITY_LOW);
+  task_pool = BLI_task_pool_create(&ctx, TASK_PRIORITY_LOW);
   totchild = ctx.totchild;
   totparent = ctx.totparent;
 
@@ -3377,7 +3373,6 @@ void psys_cache_edit_paths(Depsgraph *depsgraph,
 
   TaskParallelSettings settings;
   BLI_parallel_range_settings_defaults(&settings);
-  settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
   BLI_task_parallel_range(0, edit->totpoint, &iter_data, psys_cache_edit_paths_iter, &settings);
 
   edit->totcached = totpart;