topic cpuinfo -- for exampe - you in Intel® Integrated Performance Primitives

MulScale very slow

Sascha — Wed, 18 Sep 2013 19:57:51 GMT

Hi all,

I found out that some functions are very slow, for example the function ippiMulScale_8u_C3IR takes up to 4ms by using 1920x1080 image on Intel Core i5 CPU, 8GB RAM. (I'm using IPP 7.0 static linked).
Any suggestion?

Hi Sascha,

Igor_A_Intel — Wed, 25 Sep 2013 07:09:51 GMT

Hi Sascha,

"very slow" is not a measure - which performance do you expect for this function? If 4 ms is "slow" - what is "normal" for you? Could you provide a reproducible with full cpuinfo output for you cpu + ippiLibVersion output? Our PS shows 0.57 cpu clock per pixel per channel for this function that is 1.3 ms for 2.6 GHz Core CPU. Do you call ippInit?

regards, Igor.

Hi Sascha,

Igor_A_Intel — Wed, 25 Sep 2013 07:09:52 GMT

Hi Sascha,

regards, Igor.

Hi Sascha,

Igor_A_Intel — Wed, 25 Sep 2013 07:10:01 GMT

Hi Sascha,

regards, Igor.

Hi Igor,

Sascha — Wed, 25 Sep 2013 10:21:37 GMT

Hi Igor,

"normal" is 0ms, I mean <1ms. But maybe it is not possible with the IPP. How can I get full cpuinfo and ippiLibVersion?

cpuinfo -- for exampe - you

Gennady_F_Intel — Wed, 25 Sep 2013 13:23:49 GMT

cpuinfo -- for exampe - you use CPU-Z utility ( for free).

ippiLibVersion - pls use this code:

void libinfo(void) { const IppLibraryVersion* lib = ippiGetLibVersion(); printf(“%s %s %d.%d.%d.%d\n”, lib->Name, lib->Version, lib->major, lib->minor, lib->majorBuild, lib->build); }

Hi,

Sascha — Thu, 26 Sep 2013 06:54:46 GMT

Hi,

ippiGetLibVersion: ippip8_l.lib+ 7.0 build 205.58 7.0.205.1054

cpuinfo: attached