Re: [Fastlibnt-devel] ssfft progress report

[Development l. f. F. <fas...@li...>]

Also try:

-falign-loops=16 
-falign-functions=16 
-falign-labels=16 
-falign-jumps=16 

which are apparently all useful on the G5.

Bill.

--- Development list for FLINT
<fas...@li...> wrote:

> Are you compiling with all the G5 compiler options:
> 
> -mcpu=970 -mtune=970 -mpowerpc64 
> 
> Also, what version of gcc do you have on your G5? 
> 
> Apparently at the Apple developer site you can
> download a version specially tuned for the G5. Dunno
> if it is better than just the latest gcc from the
> web
> though. Never used a MAC.
> 
> Bill.
> 
> --- Development list for FLINT
> <fas...@li...> wrote:
> 
> > 
> > On Apr 17, 2007, at 7:52 AM, Development list for
> > FLINT wrote:
> > 
> > > Have you got the L1 cache size set correctly for
> > the
> > > G5? Isn't it 32000.
> > 
> > That's not the issue. The G5 speed problems are
> > across the board,  
> > including cases that easily fit into L1.
> > 
> > I just ran a subset of test cases again on the G5
> > just as a sanity  
> > check. Got similar results.
> > 
> > Interestingly, on the G5, the case n = 3 is
> actually
> > pretty good. On  
> > the other platforms, n = 3 was generally quite
> poor.
> > 
> > David
> > 
> > 
> >
>
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> 
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