topic ippFilterRow runs slower when using static libraries in Intel® Integrated Performance Primitives

ippFilterRow runs slower when using static libraries

mikew123 — Tue, 10 Jan 2012 17:41:55 GMT

Hello,

During my testing of the Intel libraries I've noticed that some functions take significantly longer (up to 5x) when statically linking vs dynamic linking. One in particular is ippiFilterRow. When linking with merged static libraries, it takes about 5x longer to execute then it does when linking dynamically. This happens with IPP 3.0, 6.1, and 7.0. Is this normal?

Thanks,

Mike W

ippFilterRow runs slower when using static libraries

pvonkaenel — Tue, 10 Jan 2012 19:15:19 GMT

Hi Mike,

By default the dynamic linked versions of IPP have OpenMP threading enabled - this allows certain routines to run in parallel across multiple cores. The static version can be configured for either threaded or non-threaded execution. Are you using the threaded static libs?

Peter

ippFilterRow runs slower when using static libraries

mikew123 — Tue, 10 Jan 2012 21:43:51 GMT

I am using the non-threaded static libs. I understand that the dynamic linked versions use threading in version 7.0, but is this also the case for older versions? I have reproduced this issue using the static libs using IPP versions 3.0 and 6.1 as well.

ippFilterRow runs slower when using static libraries

igorastakhov — Wed, 11 Jan 2012 08:08:35 GMT

All ippiFilterXXX functions were threaded in Q1 2002, IPP 3.0 was released in 2003 - so all these IPP version have OMP code for 2D filtering functions.

Regards,
Igor

ippFilterRow runs slower when using static libraries

mikew123 — Wed, 11 Jan 2012 13:29:57 GMT

Ah, thank you. That explains it.