Sculpt/dyntopo: Make the omp threads configurable to overcome performance issues

- autodetect optimal default, which typically avoids HT threads
- can store setting in .blend per scene
- this does not touch general omp max threads, due i found other areas where the calculations are fitting for huge corecount
- Intel notes, some of the older generation processors with HyperThreading would not provide significant performance boost for FPU intensive applications. On those systems you might want to set OMP_NUM_THREADS = total number of cores (not total number of hardware theads).

1 files changed, 10 insertions, 1 deletions

diff --git a/release/scripts/startup/bl_ui/space_view3d_toolbar.py b/release/scripts/startup/bl_ui/space_view3d_toolbar.py
index 99e3ffb490b..70ebf6aac79 100644
--- a/release/scripts/startup/bl_ui/space_view3d_toolbar.py
+++ b/release/scripts/startup/bl_ui/space_view3d_toolbar.py
@@ -1283,7 +1283,8 @@ class VIEW3D_PT_sculpt_options(Panel, View3DPaintPanel):
 
     def draw(self, context):
         layout = self.layout
-
+        scene = context.scene
+		
         toolsettings = context.tool_settings
         sculpt = toolsettings.sculpt
         capabilities = sculpt.brush.sculpt_capabilities
@@ -1293,6 +1294,14 @@ class VIEW3D_PT_sculpt_options(Panel, View3DPaintPanel):
         col.label(text="Gravity:")
         col.prop(sculpt, "gravity", slider=True, text="Factor")
         col.prop(sculpt, "gravity_object")
+		
+        col.separator()
+        col.label(text="OpenMP Threads:")
+        col.row(align=True).prop(scene, "omp_mode", expand=True)
+        sub = col.column(align=True)
+        sub.enabled = scene.omp_mode == 'MANUAL'
+        sub.prop(scene, "omp_num_threads")
+        col.separator()
 
         layout.prop(sculpt, "use_threaded", text="Threaded Sculpt")
         layout.prop(sculpt, "show_low_resolution")