diff options
Diffstat (limited to 'source/blender/blenlib/BLI_task.h')
| -rw-r--r-- | source/blender/blenlib/BLI_task.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_task.h b/source/blender/blenlib/BLI_task.h index b4c374d3fe7..0f78d2f4361 100644 --- a/source/blender/blenlib/BLI_task.h +++ b/source/blender/blenlib/BLI_task.h @@ -167,6 +167,17 @@ typedef struct ParallelRangeSettings { * processed. */ TaskParallelRangeFuncFinalize func_finalize; + /* Minimum allowed number of range iterators to be handled by a single + * thread. This allows to achieve following: + * - Reduce amount of threading overhead. + * - Partially occupy thread pool with ranges which are computationally + * expensive, but which are smaller than amount of available threads. + * For example, it's possible to multi-thread [0 .. 64] range into 4 + * thread which will be doing 16 iterators each. + * This is a preferred way to tell scheduler when to start threading than + * having a global use_threading switch based on just range size. + */ + int min_iter_per_thread; } ParallelRangeSettings; BLI_INLINE void BLI_parallel_range_settings_defaults( @@ -203,6 +214,11 @@ BLI_INLINE void BLI_parallel_range_settings_defaults( memset(settings, 0, sizeof(*settings)); settings->use_threading = true; settings->scheduling_mode = TASK_SCHEDULING_STATIC; + /* NOTE: Current value mimics old behavior, but it's not ideal by any + * means. Would be cool to find a common value which will work good enough + * for both static and dynamic scheduling. + */ + settings->min_iter_per_thread = 1; } #ifdef __cplusplus |