# Opencv parallel framework **URL:** \ **Category:** C++\ **Tags:** build\ **Created:** [November 16, 2022, 7:29am UTC](https://forum.opencv.org/t/opencv-parallel-framework/10983 "2022-11-16T07:29:33Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![HEUBITLYJ](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/heubitlyj/32/6515_2.png) [@HEUBITLYJ](https://forum.opencv.org/u/HEUBITLYJ)\ **Post date:** [November 16, 2022, 7:29am UTC](https://forum.opencv.org/t/opencv-parallel-framework/10983/1 "2022-11-16T07:29:33Z")
Hello，i am trying to accerate my application on windows with intel cpu。As far as i know，opencv support parallel framework such as： TBB、HPX、OPENMP …，i am using the opencv download from github, and the cv::getBuildInformation()'s output is: ```auto Platform: Timestamp: 2021-12-25T04:33:15Z Host: Windows 10.0.19041 AMD64 CMake: 3.16.4 CMake generator: Visual Studio 15 2017 CMake build tool: C:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/MSBuild/15.0/Bin/MSBuild.exe MSVC: 1916 Configuration: Debug Release CPU/HW features: Baseline: SSE SSE2 SSE3 requested: SSE3 Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX SSE4_1 (16 files): + SSSE3 SSE4_1 SSE4_2 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 (0 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX AVX (4 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX AVX2 (31 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX512_SKX (5 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX C/C++: Built as dynamic libs?: YES C++ standard: 11 C++ Compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe (ver 19.16.27042.0) C++ flags (Release): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /MP2 /MD /O2 /Ob2 /DNDEBUG C++ flags (Debug): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /MP2 /MDd /Zi /Ob0 /Od /RTC1 C Compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x64/cl.exe C flags (Release): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP2 /MD /O2 /Ob2 /DNDEBUG C flags (Debug): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP2 /MDd /Zi /Ob0 /Od /RTC1 Linker flags (Release): /machine:x64 /INCREMENTAL:NO Linker flags (Debug): /machine:x64 /debug /INCREMENTAL ccache: NO Precompiled headers: NO Extra dependencies: 3rdparty dependencies: OpenCV modules: To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo stitching video videoio world Disabled: python2 python3 Disabled by dependency: - Unavailable: java ts Applications: apps Documentation: NO Non-free algorithms: NO Windows RT support: NO GUI: Win32 UI: YES VTK support: NO Media I/O: ZLib: build (ver 1.2.11) JPEG: build-libjpeg-turbo (ver 2.1.2-62) WEBP: build (ver encoder: 0x020f) PNG: build (ver 1.6.37) TIFF: build (ver 42 - 4.2.0) JPEG 2000: build (ver 2.4.0) OpenEXR: build (ver 2.3.0) HDR: YES SUNRASTER: YES PXM: YES PFM: YES Video I/O: DC1394: NO FFMPEG: YES (prebuilt binaries) avcodec: YES (58.134.100) avformat: YES (58.76.100) avutil: YES (56.70.100) swscale: YES (5.9.100) avresample: YES (4.0.0) GStreamer: NO DirectShow: YES Media Foundation: YES DXVA: YES Parallel framework: Concurrency Trace: YES (with Intel ITT) ``` what i want to ask is: 1. is opencv is using the parallel framework when running? 2. how can i know which kind of parallel framwork is opencv using? 3. how can i select the parallel framework when opencv is running, so i can compare the performance? ---
**Author:** ![berak](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@berak](https://forum.opencv.org/u/berak)\ **Post date:** [November 16, 2022, 7:35am UTC](https://forum.opencv.org/t/opencv-parallel-framework/10983/2 "2022-11-16T07:35:08Z")
please, be so kind to replace the useless screenshot with TEXT, thank you. ---
**Author:** ![HEUBITLYJ](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/heubitlyj/32/6515_2.png) [@HEUBITLYJ](https://forum.opencv.org/u/HEUBITLYJ)\ **Post date:** [November 16, 2022, 7:37am UTC](https://forum.opencv.org/t/opencv-parallel-framework/10983/3 "2022-11-16T07:37:56Z")
ok. i have replace pic to txt ---
**Author:** ![HEUBITLYJ](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/heubitlyj/32/6515_2.png) [@HEUBITLYJ](https://forum.opencv.org/u/HEUBITLYJ)\ **Post date:** [November 16, 2022, 8:03am UTC](https://forum.opencv.org/t/opencv-parallel-framework/10983/4 "2022-11-16T08:03:36Z")
> [@berak](#): > > please, be so kind to replace the useless screenshot with TEXT, thank you. thanks for reply,can you help me with the three problems? ---
**Author:** ![crackwitz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/crackwitz/32/14_2.png) [@crackwitz](https://forum.opencv.org/u/crackwitz)\ **Post date:** [November 16, 2022, 10:43am UTC](https://forum.opencv.org/t/opencv-parallel-framework/10983/5 "2022-11-16T10:43:40Z")
Parallelization framework is currently not runtime-selectable but there is work to make it so. I don’t know how far that has progressed. You can always use OpenCL through OpenCV’s “transparent” API. Wrap your data in `UMat` and use with regular OpenCV functions. ---
**Author:** ![HEUBITLYJ](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/heubitlyj/32/6515_2.png) [@HEUBITLYJ](https://forum.opencv.org/u/HEUBITLYJ)\ **Post date:** [November 16, 2022, 12:36pm UTC](https://forum.opencv.org/t/opencv-parallel-framework/10983/6 "2022-11-16T12:36:51Z")
Thanks fot reply， looking forward to this work finish。 After a day of trying， i successfully compile opencv with TBB， ```auto Platform: Timestamp: 2022-11-16T10:45:07Z Host: Windows 10.0.19044 AMD64 CMake: 3.24.0-rc5 CMake generator: Visual Studio 17 2022 CMake build tool: C:/Program Files/Microsoft Visual Studio/2022/Community/MSBuild/Current/Bin/amd64/MSBuild.exe MSVC: 1934 Configuration: Debug Release CPU/HW features: Baseline: SSE SSE2 SSE3 requested: SSE3 Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX SSE4_1 (18 files): + SSSE3 SSE4_1 SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX AVX (5 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX AVX2 (34 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX512_SKX (8 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX C/C++: Built as dynamic libs?: YES C++ standard: 11 C++ Compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.34.31933/bin/Hostx64/x64/cl.exe (ver 19.34.31933.0) C++ flags (Release): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP -openmp /MD /O2 /Ob2 /DNDEBUG C++ flags (Debug): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /wd4819 /MP -openmp /MDd /Zi /Ob0 /Od /RTC1 C Compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.34.31933/bin/Hostx64/x64/cl.exe C flags (Release): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP -openmp /MD /O2 /Ob2 /DNDEBUG C flags (Debug): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP -openmp /MDd /Zi /Ob0 /Od /RTC1 Linker flags (Release): /machine:x64 /INCREMENTAL:NO Linker flags (Debug): /machine:x64 /debug /INCREMENTAL ccache: NO Precompiled headers: NO Extra dependencies: 3rdparty dependencies: OpenCV modules: To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching ts video videoio world Disabled: - Disabled by dependency: - Unavailable: java python2 python2 Applications: tests perf_tests examples apps Documentation: NO Non-free algorithms: NO Windows RT support: NO GUI: Win32 UI: YES VTK support: NO Media I/O: ZLib: build (ver 1.2.12) JPEG: build-libjpeg-turbo (ver 2.1.3-62) SIMD Support Request: YES SIMD Support: NO WEBP: build (ver encoder: 0x020f) PNG: build (ver 1.6.37) TIFF: build (ver 42 - 4.2.0) JPEG 2000: build (ver 2.4.0) OpenEXR: build (ver 2.3.0) HDR: YES SUNRASTER: YES PXM: YES PFM: YES Video I/O: DC1394: NO FFMPEG: YES (prebuilt binaries) avcodec: YES (58.134.100) avformat: YES (58.76.100) avutil: YES (56.70.100) swscale: YES (5.9.100) avresample: YES (4.0.0) GStreamer: NO DirectShow: YES Media Foundation: YES DXVA: YES Parallel framework: TBB (ver 2021.7 interface 12070) Trace: YES (with Intel ITT) Other third-party libraries: Intel IPP: 2020.0.0 Gold [2020.0.0] at: C:/lib/opencv/build/3rdparty/ippicv/ippicv_win/icv Intel IPP IW: sources (2020.0.0) at: C:/lib/opencv/build/3rdparty/ippicv/ippicv_win/iw Lapack: NO Eigen: NO Custom HAL: NO Protobuf: build (3.19.1) OpenCL: YES (NVD3D11) Include path: C:/lib/opencv/3rdparty/include/opencl/1.2 Link libraries: Dynamic load Python 3: Interpreter: C:/Users/lyj11/AppData/Local/Programs/Python/Python310/python.exe (ver 3.10.7) Libraries: C:/Users/lyj11/AppData/Local/Programs/Python/Python310/libs/python310.lib (ver 3.10.7) numpy: C:/Users/lyj11/AppData/Local/Programs/Python/Python310/lib/site-packages/numpy/core/include (ver 1.23.3) install path: C:/Users/lyj11/AppData/Local/Programs/Python/Python310/Lib/site-packages/cv2/python-3.10 Python (for build): C:/Users/lyj11/AppData/Local/Programs/Python/Python310/python.exe Java: ant: NO JNI: NO Java wrappers: NO Java tests: NO ``` And in my benchmark， with Parallel framework: Concurrency，it cost 350us ； with Parallel framework: TBB，it cost 800us ； is it reasonable？ ---
**Author:** ![HEUBITLYJ](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/heubitlyj/32/6515_2.png) [@HEUBITLYJ](https://forum.opencv.org/u/HEUBITLYJ)\ **Post date:** [November 17, 2022, 11:32am UTC](https://forum.opencv.org/t/opencv-parallel-framework/10983/7 "2022-11-17T11:32:42Z")
hello, is TBB faster than Concurrency? in my test TBB is mush slower than Concurrency