IA-32 vs Intel 64 Performance

[Lamp]

hi,

is there any report for performance between IA-32 and Intel 64 lib?

currently we are upgrading our OS to 64 bit, but the test result is not good, seems IPP Intel 64 is slower than IA-32.

we are using:

Windows XP Professional 64 bit edition
Visual Studio 2008
IPP 7.0.3 intel64

before it was:
Windows XP Professional 32 bit
Visual Studio 2008
IPP6.1.3 IA-32

The testing CPU is Intel E8400, also a 64bit CPU,
Any suggestion?

[Chao_Y_Intel]

Hello,

Which IPP function are you testing? It does not expect to have obvious performance difference between 32 bit and 64 bit in the hardware.

But in a few functions, IPP had specific optimization for one of them, while the other may not.

If you could provide the function, that may help to have further check.

Thanks,
Chao

[Lamp]

Sorry, it's because I install 2 OS on the samecomputer, the speed goes down.
I never know thattwo OS will slow down the computer....After test it again, Intel 64 is better than IA-32.


By the way, Dmip.Graph has problem when we port to 64 bit, there are LNK2001 error for Compile() and Execute() methods, also there are two other errorwhen including dmip.h.

Regards

[Chao_Y_Intel]

Hi,

Glad to know you find the problem. For DMIP error, possiblly you can post in a new thread, so we can track it and fix for future release.

Thanks,
Chao