Cycles: use TBB for task pools and task scheduler

No significant performance improvement is expected, but it means we have a
single thread pool throughout Blender. And it should make adding more
parallellization in the future easier.

After previous refactoring commits this is basically a drop-in replacement.
One difference is that the task pool had a mechanism for scheduling tasks to
the front of the queue to minimize memory usage. TBB has a smarter algorithm
to balance depth-first and breadth-first scheduling of tasks and we assume that
removes the need to manually provide hints to the scheduler.

Fixes T77533

1 files changed, 1 insertions, 1 deletions

diff --git a/intern/cycles/bvh/bvh_sort.cpp b/intern/cycles/bvh/bvh_sort.cpp
index 5bdded354bc..b01785b547a 100644
--- a/intern/cycles/bvh/bvh_sort.cpp
+++ b/intern/cycles/bvh/bvh_sort.cpp
@@ -147,7 +147,7 @@ static void bvh_reference_sort_threaded(TaskPool *task_pool,
     if (left < end) {
       if (start < right) {
         task_pool->push(
-            function_bind(bvh_reference_sort_threaded, task_pool, data, left, end, compare), true);
+            function_bind(bvh_reference_sort_threaded, task_pool, data, left, end, compare));
       }
       else {
         start = left;