PGI User Forum
 SearchSearch   MemberlistMemberlist     RegisterRegister   ProfileProfile    Log inLog in 

CUDA-x86.

Different performance for cc20 and cc13
Goto page Previous  1, 2
 
Post new topic   Reply to topic    PGI User Forum Forum Index -> Accelerator Programming
View previous topic :: View next topic  
Author Message
toepfer



Joined: 04 Dec 2007
Posts: 50

PostPosted: Wed Jun 20, 2012 4:10 pm    Post subject: Reply with quote

There is no way to pass these NVCC options through the PGI drivers. However, I
believe we support the options that you are trying to use. Use the following suboptions to the -ta=nvidia option:

    *) fastmath: enable the fast math library, which includes faster but lower precision
    implementations of certain math functions

    *) flushz: enable flush-to-zero mode
Back to top
View user's profile
_sayan_



Joined: 07 Apr 2012
Posts: 29

PostPosted: Thu Jun 21, 2012 8:49 am    Post subject: Reply with quote

Thank you very much for your advise. I do see a noticeable difference in performance when I use
Code:
-ta=nvidia,cc20,flushz,fastmath
.
May I ask why is it not possible to pass NVCC options to PGI driver? I think it could increase the flexibility of the compiler.
Back to top
View user's profile
Display posts from previous:   
Post new topic   Reply to topic    PGI User Forum Forum Index -> Accelerator Programming All times are GMT - 7 Hours
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © phpBB Group