- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I am modifying SETI@home, which uses fft in some portion. To make it faster, I replaced original fft's (actually cdft functions) with IPPs. I seem to need to use ippsFFT* functions with ippAlgHintFast hint and ippAlgHintAccurate. At first ippAlgHintAccurate is used only a few times, then ippAlgHintFast many times.
Then I found it's evidently much slower than the one with ippAlgHintFast in all fft functions. And at the same time the application version with ippAlgHintFast in all ippsFFT* functions is as fast as the one with original dft functions and ippsFFT* with ippAlgHintFast (ie, much faster).
So I suspect this hint values (ippAlgHintFast/Accurate) shouldn't be mixed in an application....am I correct?
Thanks in advance!
Then I found it's evidently much slower than the one with ippAlgHintFast in all fft functions. And at the same time the application version with ippAlgHintFast in all ippsFFT* functions is as fast as the one with original dft functions and ippsFFT* with ippAlgHintFast (ie, much faster).
So I suspect this hint values (ippAlgHintFast/Accurate) shouldn't be mixed in an application....am I correct?
Thanks in advance!
Link Copied
1 Reply
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
we need more information to provide correct answer. So, could you please specify which version of IPP did you use, on which platform and which IPP functions did you call and what were parameters?
Regards,
Vladimir
![](/skins/images/45C6C2D737ED71F4C51F0145C8CB1E9C/responsive_peak/images/icon_anonymous_message.png)
Reply
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page