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Compilation speed of different compiler versions.

 
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alfvenwave



Joined: 08 Apr 2010
Posts: 79

PostPosted: Tue Oct 12, 2010 8:56 am    Post subject: Compilation speed of different compiler versions. Reply with quote

PGF90 ver. 10.06-0 takes ~100 times longer to compile my code than ver 10.1-1.

Is this a problem with 10.6, i.e. if we go to 10.8 will we still have to endure very long compilation times?

This may be due to the Fermi libraries of course, i.e. nothing to do with Portland code.

Let me know, as it will affect our upgrade strategy....

Cheers,

Rob.
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mkcolg



Joined: 30 Jun 2004
Posts: 6211
Location: The Portland Group Inc.

PostPosted: Thu Oct 14, 2010 3:23 pm    Post subject: Reply with quote

Hi Rob,

I'm not aware of any reports about very long compile times with 10.6. Can you please send PGI Customer Service (trs@pgroup.com) an example code which exhibits the behavior?

Thanks,
Mat
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alfvenwave



Joined: 08 Apr 2010
Posts: 79

PostPosted: Fri Oct 22, 2010 1:59 am    Post subject: Reply with quote

Code sent to PGI Technical support showing 10 times slower compile time for 10.9-0 compared with 10.2-1.

PGI created TPR 17294 to address.

Solution provided by PGI:

"Add

-Mcuda=cuda3.1

to your compile line, and things should speed up considerably. The ptxas assembler is much much faster in the 3.1 toolkit."

Thanks,

Rob.
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