topic Hi Ronifl, in Intel® Integrated Performance Primitives

Rotate/Resize using more thread IPP 2017

Roni_F_ — Wed, 01 Jun 2016 18:17:12 GMT

Using ippiWarpAffineLinear_8u_C3R , ippiResizeNearest_8u_C3R

will it use one thread , or it's possible to set it to use more threads ?

Hi Ronifl,

Ying_H_Intel — Thu, 02 Jun 2016 01:35:14 GMT

Hi Ronifl,

What IPP version are you using? There are some ways to using more threads

1) you can create your own external threading on the function. The external threading is recommended, which is more effective than the internal threading.

for example,

https://software.intel.com/en-us/articles/threading-IPP-resize-with-TBB

2) using IPP internal threading,

Please see more in the article.

https://software.intel.com/en-us/articles/intel-integrated-performance-primitives-intel-ipp-threading-openmp-faq

Best Regards,

Ying

Threading in Intel IPP 8.1 and earlier versions

Threading within the deprecated multi-threaded add-on packages of the Intel IPP library is accomplished by use of the OpenMP* library. Intel IPP 8.0 continues the process of deprecating threading inside Intel IPP functions that was started in version 7.1. Though not installed by default, the threaded libraries can be installed so code written with these libraries will still work as before. However, moving to external threading is recommended.

Hi Ronifl,

Valentin_K_Intel — Thu, 02 Jun 2016 07:05:40 GMT

Hi Ronifl,

The functions ippiWarpAffineLinear_8u_C3R and ippiResizeNearest_8u_C3R do not support internal threading.

However these functions can be used for image processing by tiles with external threading.

Resizing a Tiled Image with One Prior Initialization: https://software.intel.com/en-us/node/504353#TILING_IMAGE_WITH_ONE_INIT

Warping a Tiled Image with One Prior Initialization: https://software.intel.com/en-us/node/529049#TILED_IMAGE_WITH_ONE_INIT

Best regards,
Valentin