Primitivas Intel® Integrated Performance

Join the Intel® Parallel Studio XE 2018 Beta program

We would like to invite you to participate in the Intel® Parallel Studio XE 2018 Beta program. In this beta test, you will gain early access to new features and analysis techniques. Try them out, tell us what you love and what to improve, so we can make our products better for you. 

Registration is easy. Complete the pre-beta survey, register, and download the beta software:
Intel® Parallel Studio XE 2018 Pre-Beta survey

Intel IPP 2017 Update 3 is now available

Intel® IPP 2017 Update 3 is now available. This release increased ZLIB compression performance,  added the new functions in ZLIB to support the user-defined Huffman tables:

What's New in Intel® IPP 2017 Update 3:

  • Fixed some known problems in Intel® IPP Cryptography functions.

  • Added support for Microsoft Visual Studio* 2017 on Windows*.

How the frequencies are normalized for ippsFIRGenBandpass_64f

Dear all,

I would like to use IPP band pass filter function

ippsFIRGenBandpass_64f(rLowFreq, rHighFreq, taps, tapslen, ippWinBartlett, ippTrue, pBuffer) )

However rLowFreq and rHighFreq are normalized frequency between [0,0.5]. Could you confirm how the frequency normalization should be done? Is it

f / fmax / 2

In my calculation window?

Thanks and regards,

Tianhua

Opencv+IPP+VC6

Hi dear IPP team members,

I am david and a industrial device software engineer.

Now we have a plan to using IPP to achieve the speed up work of our software.

What does LGLOOPgas_2 mean

Hi Intel Engineers,

I am now trying to use IPP 2018 Beta Updata1 to replace IPP 7.0.

From the vTune Memory Access, a brand new function (called LGLOOPgas_2) came up, which consumes the most clockticks.

I had never seen this function from IPP 7.0, and could not find any related information about it from the internet. Due to its high consuming of clockticks, high CPI Rate(10.966), and high Back-End Bound(95.0%), I am curious about what this function is doing.

High CPU usage in linux for MPEG4 and H264 encoders

Hello,

We see high cpu usage for MPEG4 and H264 encoding in Linux when compared to Windows. We are using IPP 2015.6.233 with 8.0 UMC samples.

System: Pentium CPU G4400 @3.30GHz x 2 with Intel HD Graphics 510. 

Ran umc_video_enc_con (with usleep for 142 milliseconds to process 7 FPS) on both Windows and Linux with input as YUY2 file.

Single Thread

Linux:

1% cpu for MPEG4, Encoding: 2.18 (192 FPS), Conversion 0.08

3% cpu for H264, Encoding: 14,03 (30 FPS), Conversion 0.10

unresolved typeref token (01000024) for 'FFTSpec_C_64fc'

Hi,

I'm calling the function ippsFFTInit_C_64fc() with a double pointer to IppsFFTSpec_C_64fc as one of the function parameters.

I'm facing this annoying warning - Warning LNK4248 unresolved typeref token (01000024) for 'FFTSpec_C_64fc'; image may not run.

I understand that I get this warning due to the fact that IppsFFTSpec_C_64fc  is a typedef of struct FFTSpec_C_64fc (ipptypes.h) and struct FFTSpec_C_64fc has no definition.

Division by infinity problem

Hello,

I am using IPP 2017 update 3 as single-threaded static library on Visual Studio 2015. My runtime environments are:

  • Intel® Core™ i7-3770 CPU @ 3.40GHz on Windows 7,
  • Intel® Xeon® CPU E5-1650 v4 @ 3.60GHz on Windows 10.

I found a problem with division of finite number by infinity (like 1/inf) with the following functions:

  • ippsDiv_32f,
  • ippsDiv_32f_I,
  • ippiDiv_32f_C1R,
  • ippiDiv_32f_C1IR

As the result of operation I receive NaN instead of 0.

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