Intel® Integrated Performance Primitives
Deliberate problems developing high-performance vision, signal, security, and storage applications.
6731 Discussions

IPP vector length is very important...

danijeldomazet
Beginner
‎12-19-2003 11:16 AM
770 Views
I guess I know why I had trouble with some IPPs. It's the length!!! Be very carefull with it!
For example ippsDotProd function is faster only ifvector length is higher than ~30 (on my Pentium 4)! The longer the vector the more speed gain you have... see the graph below.
0 Kudos

Link Copied

1 Reply
Ying_S_Intel
Employee
‎12-31-2003 06:43 AM
770 Views
What data typeof ippsDotProd functionin your test? Which version of IPP are you using? If you think the performance is impacted bythe length of vector in ippsDotProd functions, please submit an issue to Intel Premier Support, aslo it would be helpful if you can supply a small test case that can reproduce the problem.

Thanks,
Ying Song
Intel IPP
0 Kudos
Copy link
Reply

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.